Mineral County, CO — Planting Guide
June to-do list for Mineral County, Colorado
June is a pivotal month for Mineral County, Colorado gardens. Focus on these tasks first and you'll set up the rest of the season for success.
-
Move basil, cucumber, and kale into the garden
Frost risk is low now in Mineral County, Colorado. If you've been covering beds overnight, you can stop.
-
Seed basil, cucumber, and green beans outdoors
Your soil is 41°F — warm enough for these to germinate without babying.
-
Start harvesting radish, cress, and microgreens
Check every 1–2 days. Many of these get tough or go to seed if you wait too long.
July prep starts now
- Transplants going out: alpine strawberries, aronia, and blackberries
- Starting indoors: basil, cucumber, and kale
- First harvests: carrots, lettuce, and radish
- Fall sowing: carrots, kale, and lettuce
Mineral County is in USDA Zone 5a. The average last spring frost is June 10 and the first fall frost is September 13, giving you a growing season of approximately 95 days.
At an elevation of 7,809 ft, Mineral County receives approximately 12.8 in of rainfall annually. Summer highs average 80°F with winter lows around 7°F. The predominant soil type is Loam.
Based on 31 years of NOAA climate station data, the last frost date here varies by 37 days year to year — ranging from May 20 in warm years to June 26 in cold years. The growing season is trending longer by about 2.52 days per decade. Mineral County scores 28/100 (Challenging) on the Microclimate Index.
🌡️ Zone
5a (-20°F to -15°F min)
❄️ Last Frost
June 10
🍂 First Frost
September 13
📅 Growing Season
95 days
⛰️ Elevation
7,809 ft
🌧️ Annual Rainfall
12.8 in
Monthly Watering Calendar for Mineral County
When you'll need to water your garden — based on average monthly rainfall vs. the ~1 inch/week most gardens need.
The practical takeaway: Plants need different amounts of water at different growth stages — heavy at flowering and fruit-set, lighter at establishment. Mineral County's 13" annual rainfall is your starting math; the timing tells you when natural rain will cover you and when you need to step in.
View detailed monthly data
| Month | Avg Rainfall | Rainy Days | Extra Water Needed | Watering Effort |
|---|---|---|---|---|
| Jan | 1 in | 6 days | — | None |
| Feb | 0.8 in | 5 days | — | None |
| Mar | 1.2 in | 7 days | — | None |
| Apr | 1.1 in | 6 days | 3.2 in | Critical |
| May | 1.6 in | 8 days | 2.7 in | High |
| Jun | 0.8 in | 5 days | 3.5 in | Critical |
| Jul | 1 in | 6 days | 3.3 in | Critical |
| Aug | 1.4 in | 6 days | 2.9 in | High |
| Sep | 0.9 in | 6 days | 3.4 in | Critical |
| Oct | 1.2 in | 6 days | 3.1 in | Critical |
| Nov | 0.9 in | 5 days | — | None |
| Dec | 0.8 in | 7 days | — | None |
Annual total: 12.7 in. Water needs vary by crop — tomatoes need ~1.2"/week while herbs like rosemary need only 0.3"/week. Check individual plant pages for crop-specific water budgets that factor in your county's rainfall and soil drainage.
Mineral County Soil Profile
Soil Type
Loam
Soil pH
6.8-8
Drainage
Well Drained
Frost Risk Probability
Based on 31 years of NOAA weather station data from 3 stations
Beginners: Plant frost-sensitive crops (tomatoes, peppers, squash) after the "Safe" date on the left. Harvest or cover them before the "Protect by" date on the right. Hardy crops (lettuce, peas, kale) can go in the yellow transition zones.
How to read this table: "Conservative" means you're safe from frost 9 out of 10 years — best for beginners and frost-sensitive crops. "Average year" is the typical date. "Aggressive" means only 1 in 10 years is that warm — experienced gardeners with frost protection can try these dates.
| Planting Strategy | Last Spring Frost | First Fall Frost | Frost-Free Days |
|---|---|---|---|
| Conservative (safest) | Jun 26 | Sep 30 | 96 days |
| Cautious | Jun 18 | Sep 20 | 94 days |
| Average year | Jun 10 | Sep 13 | 95 days |
| Optimistic | May 29 | Sep 7 | 101 days |
| Aggressive (risky) | May 20 | Aug 13 | 85 days |
Not very — frost dates can vary by ±37 days year-to-year. Use the "Conservative" row in the table below, and keep row covers handy for surprise late frosts.
Yes — growing seasons are getting longer here (about 2.5 days per decade). Spring is arriving earlier than it used to. Good news for gardeners.
Gardening Difficulty Score
Mineral County has challenging growing conditions. Season extension and careful variety selection are essential.
Local Gardening Help in Mineral County
Free expert help is closer than you think. Your county's cooperative extension office connects you with trained gardeners, soil testing labs, and local programs — all specific to Mineral County's climate and soil.
County Extension Office
Mineral County Colorado State University Extension Extension Office
Phone: 970-491-6281
Visit Extension Office Website →
Extension offices are run by land-grant universities and funded by the USDA. Their advice is free, research-based, and tailored to your county's specific conditions.
Master Gardener Program
Free gardening help from trained volunteers
Master Gardeners are community volunteers who complete 40–60 hours of university horticultural training. They answer gardening questions, diagnose plant problems, and offer workshops — all free.
Many extension offices run a Master Gardener hotline where you can call or email with photos of plant problems for free diagnosis.
Soil Testing
Available through your extension office
Before amending your soil, get it tested. Your extension office offers soil testing (typically $10–$25) that tells you exact pH, nutrient levels, and amendment recommendations specific to what you want to grow.
Services Available in Mineral County
Finding local nurseries & garden centers in Mineral County
Why Buy Local
Local nurseries carry plants that are proven to grow in your area. Staff can give you advice specific to Mineral County's soil and climate that big-box stores can't. Plants from local growers are typically hardier because they're already acclimated to your zone.
How to Find Them
Search for "nurseries near Mineral County CO" or "garden center Mineral County" on Google Maps. Also check with your extension office — they often maintain lists of reputable local nurseries and plant sales.
Community gardens & gardening groups
Community gardens are a great way to learn from experienced gardeners in your area, especially if you're limited on space. Search "community garden Mineral County CO" or check your extension office and local parks department. Facebook groups like "Mineral County Gardeners" or "Colorado Gardening" are also excellent for local advice and plant swaps.
What to Plant After Your Harvest
After your first crops finish, use the remaining frost-free days to grow a second round.
Sunlight & Day Length in Mineral County
Monthly daylight hours and peak sun — critical for onion varieties, photoperiod-sensitive plants, and solar garden planning.
The practical takeaway: You can't change the sun. Picking the right day-length-matched varieties for Mineral County matters more than any other "fix" you make — and the seed packet tells you (look for "long-day," "short-day," "day-neutral").
Longest Day
14.6 hours
Summer solstice daylight
Shortest Day
9.4 hours
Winter solstice daylight
Peak Sun Hours
10.3 hr/day peak (summer)
Peak sun hours (green dashed line below) account for cloud cover — this is the usable direct sunlight your garden actually receives. Most vegetables need 6+ peak sun hours.
Onion tip: Your long summer days (14+ hours) support long-day onion varieties like Walla Walla, Sweet Spanish, and Ailsa Craig.
View detailed monthly data
| Month | Daylight Hours | Peak Sun Hours | Day Length |
|---|---|---|---|
| January | 9.7 hr | 5.5 hr | Short day |
| February | 10.6 hr | 6.1 hr | Short day |
| March | 11.7 hr | 7.2 hr | Short day |
| April | 13 hr | 7.2 hr | Neutral |
| May | 14 hr | 8.9 hr | Long day |
| June | 14.6 hr | 10.3 hr | Long day |
| July | 14.4 hr | 9.6 hr | Long day |
| August | 13.5 hr | 8.8 hr | Neutral |
| September | 12.2 hr | 8.9 hr | Neutral |
| October | 11 hr | 7.3 hr | Short day |
| November | 9.9 hr | 5.5 hr | Short day |
| December | 9.4 hr | 5.3 hr | Short day |
Peak sun hours factor in typical cloud cover — use these for solar panel and shade-planning calculations.
Soil Temperature & Composting in Mineral County
Monthly soil temps tell you when to plant warm-season crops, and when your compost pile is actively working.
What this means for you: Most root crops germinate well at 50-60°F. Most fruit-bearing crops want 65-75°F. Mineral County's monthly soil curve maps these windows to actual months.
Plant Warm Crops When
Soil reaches 60°F+
Soil rarely reaches 60°F — use black plastic mulch to warm soil.
Best Month to Compost
Aug
Microbial activity peaks when soil is warm.
Active Composting
1 months
Short season — insulate pile or use indoor vermicomposting.
View detailed monthly data
| Month | Soil 4" Deep | Soil 8" Deep | Compost Activity | Time to Finish |
|---|---|---|---|---|
| Jan | -7°F | 1°F | ❄️ Dormant | ~36 weeks |
| Feb | -5°F | -1°F | ❄️ Dormant | ~36 weeks |
| Mar | 4°F | 5°F | ❄️ Dormant | ~36 weeks |
| Apr | 16°F | 15°F | ❄️ Dormant | ~36 weeks |
| May | 34°F | 28°F | ❄️ Dormant | ~36 weeks |
| Jun | 41°F | 37°F | 🐢 Slow | ~24 weeks |
| Jul | 49°F | 45°F | 🐢 Slow | ~24 weeks |
| Aug | 52°F | 46°F | ♻️ Active | ~14 weeks |
| Sep | 41°F | 42°F | 🐢 Slow | ~24 weeks |
| Oct | 31°F | 33°F | ❄️ Dormant | ~36 weeks |
| Nov | 15°F | 20°F | ❄️ Dormant | ~36 weeks |
| Dec | 1°F | 9°F | ❄️ Dormant | ~36 weeks |
Highlighted rows = soil 60°F+ (safe for warm-season transplants). Compost finishes fastest during peak activity months.
Pest & Disease Pressure in Mineral County
Computed from local climate patterns — warmer, humid conditions increase pest generations and fungal disease risk.
The practical takeaway: Pest pressure scales with warmth and humidity. Hot humid Mineral County sees year-round bugs and fungal disease; cold dry regions see almost none. A high pest score means crop rotation, resistant varieties, and a weekly pest-watch routine from day one.
Insect Pest Pressure
Moderate — common pests appear but manageable with monitoring.
Disease Risk
Low disease risk — dry conditions reduce fungal problems.
Seasonal Risk
View 5 common pests in your area
| Pest | Risk Level | Peak Months |
|---|---|---|
| Aphids | Moderate | May, Jun, Jul, Aug |
| Cabbage worms | Low | Jun, Jul, Aug |
| Colorado potato beetle | Moderate | Jun, Jul |
| Flea beetles | Low | May, Jun, Jul |
| Slugs | Low | May, Jun, Jul, Aug, Sep |
Organic pest management tips
- Maintain healthy soil with regular compost additions to build natural pest resistance
- Practice crop rotation annually to break pest cycles
- Encourage beneficial insects with flowering herbs like dill, fennel, and yarrow
Cover Crops for Mineral County
Cover crops protect bare soil, fix nitrogen, suppress weeds, and improve soil structure — with planting dates calibrated for your area.
Why it matters: Cover crops are the experienced gardener's secret weapon. Mineral County's climate determines which species thrive: clover and vetch in mild winters, cereal rye and Austrian peas in cold ones.
Spring Cover Crops (2 options) — Build soil before the main growing season
| Crop | Plant By | Terminate | N-Fixing | Soil Benefit |
|---|---|---|---|---|
| Buckwheat | Jun 18 | Jul 12 | — | Rapid growth, attracts pollinators, suppresses weeds |
| White clover | May 12 | Jul 19 | ✓ Yes | Living mulch, fixes nitrogen, permanent ground cover |
Summer Cover Crops (1 options) — Fill gaps and suppress weeds between plantings
| Crop | Plant By | Terminate | N-Fixing | Soil Benefit |
|---|---|---|---|---|
| Sunflowers | Jun 26 | Aug 23 | — | Deep roots break compaction, attract pollinators and beneficial insects |
Fall Cover Crops (5 options) — Plant after harvest to protect soil over winter
| Crop | Plant By | Terminate | N-Fixing | Soil Benefit |
|---|---|---|---|---|
| Daikon radish | Jul 24 | May 20 | — | Deep taproot breaks compaction, excellent for clay soils |
| Hairy vetch | Jun 23 | May 20 | ✓ Yes | Excellent nitrogen fixer, good for depleted soils |
| Oats | Aug 14 | May 20 | — | Quick biomass, winterkills in cold zones — no spring tillage needed |
| Winter rye | Jun 13 | May 27 | — | Suppresses weeds, prevents erosion, breaks up compacted soil |
| Winter wheat | Jun 19 | May 27 | — | Erosion control, weed suppression, good biomass |
Wind & Microclimate in Mineral County
What this means for you: A 10 mph wind doesn't feel like much, but it triples leaf transpiration vs. still air. Mineral County's 10.9 mph average means most days are gentle on plants, but consider how a 20+ mph spring gust would affect a flat of seedlings hardened off too quickly.
Wind dries soil, stresses plants, and affects frost patterns. Understanding your exposure helps with garden placement.
Seasonal Wind Speed
Spring: 16 mph Summer: 11 mph
Fall: 13 mph Winter: 14 mph
Prevailing wind: W. Windy area — plant a windbreak hedge on the W side of your garden.
Windbreak Benefit
7.3/10
Strongly recommended — a windbreak (fence, hedge, or row of tall crops like corn or sunflowers) will significantly improve garden yields.
Frost Pocket Risk
High
Hilly terrain with 1,433 ft of elevation range — cold air pools in low spots. Avoid planting frost-sensitive crops in valleys.
Rainwater Harvesting in Mineral County
How much water you can collect, when to collect it, and what size system you need for your garden.
What this means for you: Rainwater is unchlorinated, unfluoridated, and at ambient temperature — plants actually prefer it. Mineral County's 13" annual rainfall means even a small 50-gallon barrel catches enough for a few weeks of garden watering between storms.
Annual Collection
6,329 gal
Per 1,000 sq ft of roof area (at 80% collection efficiency)
Recommended Setup
8 rain barrels (55 gal each)
For a typical 500 sq ft garden. Serious collectors: consider a 2,000 gal tank.
Legal Status
Limited
Your state has quantity limits on rainwater collection — check local regulations before installing large systems.
Best Collection Months
Mar, May, Aug, Oct
Highest rainfall months — your barrels will fill up quickly during these months.
Months to Draw From Storage
Feb, Jun, Sep, Nov, Dec
Dry months when you'll rely on stored water — size your storage for this gap.
Rainwater collection tips for your area
- Your county receives approximately 12.7 inches of rain per year
- A 1,000 sq ft roof can collect roughly 6,329 gallons annually
- Check CO state regulations — rainwater harvesting has quantity limits
- In your dry climate, every drop counts — consider a larger cistern system
- Position collection tanks in shade to reduce evaporation and algae growth
Soil & Growing Conditions in Mineral County
Soil Type
Loam
Soil pH 6.8–8 · Excessively Drained drainage
Good candidate for raised beds to maximise drainage and extend the season.
Watering Needs
Drought stress: 5.5/10
Moderate drought pressure. Drip irrigation and mulching are highly recommended to maintain soil moisture through summer.
Season Tips
95-day frost-free season
A short season means indoor starts are critical for warm-season crops. Prioritise cold-hardy, fast-maturing varieties and use row covers to extend autumn harvests.
Your Free Printable Garden Planner
Plan every bed, every planting, every harvest — in one place. This 22-page printable includes your zone's planting calendar, a month-by-month task list, a seed inventory tracker, a harvest log, and succession-planting charts. Built to print, write in, and actually use all season.
Recommended for Your Garden
Test your soil pH, nitrogen, phosphorus, and potassium levels before planting.
Get instant, accurate soil pH readings to fine-tune your amendments.
Boost soil fertility and structure with rich, well-aged organic compost.
🥬 Vegetables to Grow in Mineral County
105 vegetables that grow well in Zone 5a with planting dates for Mineral County.
Show all 105 vegetables with planting dates
| Plant | Start Indoors | Direct Sow | Transplant | Fall Plant | Harvest | Days to Maturity |
|---|---|---|---|---|---|---|
| Acorn Squash | May 6 | Jun 17 | Jun 24 | — | Sep 16 – Oct 21 | 80–100 |
| Amaranth | Apr 15 | Jun 17 | Jun 24 | — | Sep 23 – Nov 11 | 90–120 |
| Arugula | May 6 | May 27 | Jun 10 | Jul 5 | Jul 15 – Sep 16 | 30–50 |
| Asparagus | — | — | Jun 24 | — | — | 730–1095 |
| Beets | — | May 27 | — | Jul 5 | Jul 22 – Aug 19 | 50–70 |
| Belgian Endive | May 6 | May 27 | Jun 10 | Jul 5 | Sep 30 – Nov 25 | 110–150 |
| Bitter Melon | Apr 15 | Jun 17 | Jun 24 | — | Aug 26 – Oct 7 | 60–90 |
| Black Beans | — | Jun 17 | — | — | Sep 16 – Nov 4 | 90–120 |
| Bok Choy | May 6 | May 27 | Jun 10 | Jul 5 | Jul 22 – Aug 26 | 40–60 |
| Broccoli | May 6 | May 27 | Jun 10 | Jul 5 | Aug 12 – Sep 23 | 60–90 |
| Broccoli Rabe | May 6 | May 27 | Jun 10 | Jul 5 | Jul 22 – Aug 26 | 40–60 |
| Brussels Sprouts | May 6 | May 27 | Jun 10 | Jul 5 | Sep 9 – Nov 4 | 90–130 |
| Butternut Squash | May 6 | Jun 17 | Jun 24 | — | Sep 23 – Oct 28 | 85–110 |
| Cabbage | May 6 | May 27 | Jun 10 | Jul 5 | Aug 12 – Oct 7 | 60–100 |
| Calabash | Apr 15 | Jun 17 | Jun 24 | — | Sep 16 – Nov 11 | 80–120 |
| Carrots | — | May 27 | — | Jul 5 | Jul 29 – Sep 2 | 60–80 |
| Cauliflower | May 6 | May 27 | Jun 10 | Jul 5 | Aug 5 – Oct 7 | 55–100 |
| Celeriac | May 6 | May 27 | Jun 10 | Jul 5 | Sep 23 – Oct 28 | 100–120 |
| Celery | May 6 | May 27 | Jun 10 | Jul 5 | Sep 2 – Oct 28 | 80–120 |
| Celtuce | May 6 | May 27 | Jun 10 | Jul 5 | Aug 12 – Sep 23 | 60–90 |
| Chard | May 6 | May 27 | Jun 10 | Jul 5 | Aug 5 – Sep 23 | 50–60 |
| Chickpeas | May 6 | May 27 | Jun 10 | Jul 5 | Sep 2 – Oct 14 | 80–110 |
| Chicory | May 6 | May 27 | Jun 10 | Jul 5 | Aug 12 – Sep 23 | 60–85 |
| Chinese Cabbage | May 6 | May 27 | Jun 10 | Jul 5 | Aug 5 – Sep 2 | 50–70 |
| Christmas Lima Beans | Apr 15 | Jun 17 | Jun 24 | — | Sep 16 – Oct 21 | 80–100 |
| Collard Greens | May 6 | May 27 | Jun 10 | Jul 5 | Aug 5 – Oct 7 | 55–75 |
| Corn | — | Jun 17 | — | — | Aug 19 – Oct 14 | 60–100 |
| Cowpeas | — | Jun 17 | — | — | Aug 19 – Sep 30 | 60–90 |
| Cress | May 6 | May 27 | Jun 10 | Jul 5 | Jun 24 – Jul 15 | 14–21 |
| Crookneck Squash | May 6 | Jun 17 | Jun 24 | — | Aug 12 – Sep 9 | 45–60 |
| Crosne | — | May 27 | — | Jul 5 | Oct 28 – Nov 11 | 150–200 |
| Cucumber | May 6 | Jun 17 | Jun 24 | — | Aug 19 – Oct 14 | 50–70 |
| Daikon | — | May 27 | — | Jul 5 | Jul 22 – Aug 19 | 50–70 |
| Delicata Squash | May 6 | Jun 17 | Jun 24 | — | Sep 16 – Oct 21 | 80–100 |
| Edamame | — | Jun 17 | — | — | Sep 2 – Oct 14 | 75–100 |
| Eggplant | Apr 1 | Jun 17 | Jun 24 | — | Sep 2 – Nov 4 | 65–85 |
| Endive | May 6 | May 27 | Jun 10 | Jul 5 | Jul 29 – Sep 2 | 45–65 |
| Escarole | May 6 | May 27 | Jun 10 | Jul 5 | Aug 5 – Sep 2 | 50–70 |
| Fava Beans | May 6 | May 27 | Jun 10 | Jul 5 | Aug 26 – Oct 7 | 75–100 |
| Fennel | Apr 15 | Jun 17 | Jun 24 | — | Aug 26 – Oct 7 | 60–90 |
| Garlic | — | — | — | Aug 2 | Nov 1 – Jan 17 | 90–240 |
| Green Beans | — | Jun 17 | — | — | Aug 12 – Oct 7 | 50–65 |
| Horseradish | — | — | Jun 24 | — | Oct 28 – Dec 9 | 120–180 |
| Hot Peppers | Apr 1 | Jun 17 | Jun 24 | — | Sep 2 – Dec 9 | 70–120 |
| Hubbard Squash | May 6 | Jun 17 | Jun 24 | — | Oct 7 – Nov 11 | 100–120 |
| Kabocha | May 6 | Jun 17 | Jun 24 | — | Sep 23 – Oct 21 | 85–100 |
| Kai Lan | May 6 | May 27 | Jun 10 | Jul 5 | Jul 29 – Aug 26 | 45–60 |
| Kale | May 6 | May 27 | Jun 10 | Jul 5 | Aug 5 – Sep 30 | 50–70 |
| Kidney Beans | — | Jun 17 | — | — | Sep 16 – Oct 21 | 85–110 |
| Kohlrabi | May 6 | May 27 | Jun 10 | Jul 5 | Jul 29 – Sep 2 | 45–65 |
| Komatsuna | May 6 | May 27 | Jun 10 | Jul 5 | Jul 15 – Aug 19 | 35–50 |
| Leeks | May 6 | May 27 | Jun 10 | Jul 5 | Sep 9 – Nov 25 | 90–150 |
| Lentils | May 6 | May 27 | Jun 10 | Jul 5 | Sep 2 – Oct 14 | 80–110 |
| Lettuce | May 6 | May 27 | Jun 10 | Jul 5 | Jul 15 – Sep 23 | 30–60 |
| Lima Beans | — | Jun 17 | — | — | Aug 19 – Sep 30 | 60–90 |
| Mache | May 6 | May 27 | Jun 10 | Jul 5 | Jul 22 – Aug 26 | 40–60 |
| Melon | May 6 | Jun 17 | Jun 24 | — | Sep 2 – Oct 21 | 70–100 |
| Microgreens | May 6 | May 27 | Jun 10 | Jul 5 | Jun 17 – Jul 15 | 7–21 |
| Mitsuba | May 6 | May 27 | Jun 3 | Jul 5 | Jul 29 – Sep 23 | 50–70 |
| Mizuna | May 6 | May 27 | Jun 10 | Jul 5 | Jul 15 – Aug 12 | 30–45 |
| Mustard Greens | May 6 | May 27 | Jun 10 | Jul 5 | Jul 15 – Sep 16 | 30–50 |
| Napa Cabbage | May 6 | May 27 | Jun 10 | Jul 5 | Aug 5 – Sep 9 | 55–75 |
| New Zealand Spinach | Apr 15 | Jun 17 | Jun 24 | — | Aug 19 – Sep 16 | 55–70 |
| Okra | Apr 15 | Jun 17 | Jun 24 | — | Aug 19 – Oct 14 | 50–65 |
| Onion | May 6 | May 27 | Jun 10 | Jul 5 | Sep 9 – Oct 28 | 90–120 |
| Pac Choi | May 6 | May 27 | Jun 10 | Jul 5 | Jul 22 – Aug 19 | 40–55 |
| Parsnip | — | May 27 | — | Jul 5 | Sep 9 – Oct 21 | 100–130 |
| Patty Pan Squash | May 6 | Jun 17 | Jun 24 | — | Aug 12 – Sep 9 | 45–60 |
| Peas | May 6 | May 27 | Jun 10 | Jul 5 | Aug 5 – Sep 30 | 55–70 |
| Peppers | Apr 1 | Jun 17 | Jun 24 | — | Aug 26 – Nov 4 | 60–90 |
| Pole Beans | Apr 15 | Jun 17 | Jun 24 | — | Aug 19 – Oct 14 | 55–70 |
| Potatoes | Apr 15 | Jun 17 | Jun 24 | — | Sep 2 – Nov 11 | 70–120 |
| Pumpkin | May 6 | Jun 17 | Jun 24 | — | Sep 23 – Nov 11 | 85–120 |
| Purslane | May 6 | May 27 | Jun 10 | Jul 5 | Jul 22 – Aug 26 | 40–60 |
| Radicchio | May 6 | May 27 | Jun 10 | Jul 5 | Aug 12 – Sep 16 | 60–80 |
| Radish | — | May 27 | — | Jul 5 | Jun 24 – Jul 15 | 22–35 |
| Rhubarb | — | — | Jul 1 | — | — | 365–730 |
| Romanesco | May 6 | May 27 | Jun 10 | Jul 5 | Aug 26 – Oct 7 | 75–100 |
| Rutabaga | — | May 27 | — | Jul 5 | Aug 19 – Sep 23 | 80–100 |
| Salsify | — | May 27 | — | Jul 5 | Sep 9 – Oct 21 | 100–130 |
| Savoy Cabbage | May 6 | May 27 | Jun 10 | Jul 5 | Aug 19 – Oct 14 | 70–110 |
| Scallions | May 6 | May 27 | Jun 10 | Jul 5 | Aug 5 – Sep 2 | 50–70 |
| Scarlet Runner Beans | Apr 15 | Jun 17 | Jun 24 | — | Aug 26 – Sep 30 | 60–80 |
| Shallot | May 6 | May 27 | Jun 10 | Jul 5 | Sep 9 – Oct 28 | 90–120 |
| Shiso | Apr 22 | Jun 17 | Jun 24 | — | Aug 19 – Oct 14 | 50–70 |
| Snap Peas | Apr 15 | Jun 17 | Jun 24 | — | Aug 19 – Oct 14 | 55–70 |
| Snow Peas | May 6 | May 27 | Jun 10 | Jul 5 | Aug 5 – Sep 30 | 50–65 |
| Soybeans | — | Jun 17 | — | — | Sep 9 – Nov 4 | 80–120 |
| Spaghetti Squash | May 6 | Jun 17 | Jun 24 | — | Sep 23 – Oct 21 | 85–100 |
| Spinach | May 6 | May 27 | Jun 10 | Jul 5 | Jul 15 – Sep 16 | 35–50 |
| Squash (Summer) | May 6 | Jun 17 | Jun 24 | — | Aug 12 – Oct 14 | 45–65 |
| Squash (Winter) | May 6 | Jun 17 | Jun 24 | — | Sep 16 – Nov 11 | 80–120 |
| Sunchoke | — | — | Jun 24 | — | Oct 14 – Dec 9 | 110–150 |
| Sweet Corn | — | Jun 17 | — | — | Aug 19 – Sep 30 | 60–90 |
| Sweet Potatoes | Apr 15 | Jun 17 | Jun 24 | — | Sep 23 – Nov 11 | 90–120 |
| Tatsoi | May 6 | May 27 | Jun 10 | Jul 5 | Jul 15 – Aug 19 | 35–50 |
| Tomatillo | Apr 15 | Jun 17 | Jun 24 | — | Aug 26 – Nov 4 | 60–85 |
| Tomatoes | Apr 15 | Jun 17 | Jun 24 | — | Aug 26 – Nov 4 | 60–85 |
| Turnip | — | May 27 | — | Jul 5 | Jul 8 – Aug 12 | 40–60 |
| Watercress | May 6 | May 27 | Jun 10 | Jul 5 | Jul 22 – Aug 26 | 40–60 |
| Watermelon | May 6 | Jun 17 | Jun 24 | — | Sep 2 – Oct 21 | 70–100 |
| Wax Beans | — | Jun 17 | — | — | Aug 12 – Oct 7 | 50–65 |
| Winter Melon | Apr 15 | Jun 17 | Jun 24 | — | Sep 23 – Nov 11 | 90–120 |
| Yard Long Beans | Apr 15 | Jun 17 | Jun 24 | — | Aug 19 – Sep 30 | 55–80 |
| Zucchini | May 6 | Jun 17 | Jun 24 | — | Aug 12 – Oct 7 | 45–60 |
🍓 Fruits to Grow in Mineral County
27 fruits that grow well in Zone 5a with planting dates for Mineral County.
Show all 27 fruits with planting dates
| Plant | Start Indoors | Direct Sow | Transplant | Fall Plant | Harvest | Days to Maturity |
|---|---|---|---|---|---|---|
| Alpine Strawberries | — | — | Jul 1 | — | Sep 30 – Dec 16 | 90–180 |
| Aronia | — | — | Jul 1 | — | — | 730–1095 |
| Blackberries | — | — | Jul 1 | — | — | 365–730 |
| Blueberries | — | — | Jul 1 | — | — | 730–1095 |
| Boysenberries | — | — | Jul 1 | — | — | 365–730 |
| Cantaloupe | — | — | Jul 1 | — | Sep 9 – Oct 14 | 70–90 |
| Che Fruit | — | — | Jul 1 | — | — | 1095–1825 |
| Cranberries | — | — | Jul 1 | — | — | 730–1095 |
| Currants | — | — | Jul 1 | — | — | 730–1095 |
| Elderberries | — | — | Jul 1 | — | — | 730–1095 |
| Goji Berries | — | — | Jul 1 | — | — | 730–1095 |
| Gooseberries | — | — | Jul 1 | — | — | 730–1095 |
| Grapes | — | — | Jul 1 | — | — | 730–1095 |
| Ground Cherry | — | — | Jul 1 | — | Sep 9 – Nov 4 | 65–80 |
| Hardy Kiwi | — | — | Jul 1 | — | — | 1095–1825 |
| Haskaps | — | — | Jul 1 | — | — | 730–1095 |
| Honeydew | — | — | Jul 1 | — | Sep 23 – Nov 4 | 80–110 |
| Jostaberry | — | — | Jul 1 | — | — | 730–1095 |
| Lingonberries | — | — | Jul 1 | — | — | 730–1095 |
| Medlar | — | — | Jul 1 | — | — | 1095–1825 |
| Mulberries | — | — | Jul 1 | — | — | 730–1825 |
| Pawpaw | — | — | Jul 1 | — | — | 1095–2555 |
| Persimmon | — | — | Jul 1 | — | — | 1095–2555 |
| Quince | — | — | Jul 1 | — | — | 1095–1825 |
| Raspberries | — | — | Jul 1 | — | — | 365–730 |
| Serviceberries | — | — | Jul 1 | — | — | 730–1095 |
| Strawberries | — | — | Jul 1 | — | Sep 30 – Dec 16 | 90–365 |
🌿 Herbs to Grow in Mineral County
34 herbs that grow well in Zone 5a with planting dates for Mineral County.
Show all 34 herbs with planting dates
| Plant | Start Indoors | Direct Sow | Transplant | Fall Plant | Harvest | Days to Maturity |
|---|---|---|---|---|---|---|
| Angelica | May 6 | May 27 | Jun 3 | Jul 5 | — | 365–730 |
| Anise | May 6 | May 27 | Jun 3 | Jul 5 | Sep 2 – Nov 18 | 90–120 |
| Basil | Apr 22 | Jun 17 | Jun 24 | — | Aug 19 – Oct 21 | 50–75 |
| Bee Balm | — | — | Jun 17 | — | Sep 16 – Dec 2 | 90–120 |
| Borage | May 6 | May 27 | Jun 3 | Jul 5 | Jul 29 – Sep 16 | 50–60 |
| Caraway | May 6 | May 27 | Jun 3 | Jul 5 | — | 365–450 |
| Catnip | — | — | Jun 17 | — | Aug 19 – Oct 21 | 60–80 |
| Chamomile | May 6 | May 27 | Jun 3 | Jul 5 | Aug 5 – Oct 14 | 60–90 |
| Chervil | May 6 | May 27 | Jun 3 | Jul 5 | Jul 15 – Sep 16 | 40–60 |
| Chives | — | — | Jun 17 | — | Aug 19 – Oct 28 | 60–90 |
| Cilantro | May 6 | May 27 | Jun 3 | Jul 5 | Jul 15 – Sep 16 | 40–60 |
| Comfrey | — | — | Jun 17 | — | Aug 19 – Oct 28 | 60–90 |
| Cumin | May 6 | May 27 | Jun 3 | Jul 5 | Sep 16 – Nov 18 | 100–120 |
| Dill | May 6 | May 27 | Jun 3 | Jul 5 | Jul 15 – Sep 16 | 40–60 |
| Epazote | Apr 22 | Jun 17 | Jun 24 | — | Aug 12 – Oct 7 | 45–60 |
| Fennel (herb) | May 6 | May 27 | Jun 3 | Jul 5 | Aug 5 – Oct 14 | 60–90 |
| Feverfew | — | — | Jun 17 | — | Sep 16 – Dec 2 | 90–120 |
| Garlic Chives | — | — | Jun 17 | — | Aug 19 – Oct 28 | 60–90 |
| Horehound | — | — | Jun 17 | — | Sep 2 – Oct 28 | 75–90 |
| Hyssop | — | — | Jun 17 | — | Aug 26 – Oct 28 | 70–90 |
| Lemon Balm | — | — | Jun 17 | — | Aug 19 – Oct 7 | 60–70 |
| Lemon Thyme | — | — | Jun 17 | — | Aug 26 – Oct 28 | 70–90 |
| Lovage | — | — | Jun 17 | — | Aug 26 – Oct 28 | 70–90 |
| Mint | — | — | Jun 17 | — | Aug 19 – Oct 28 | 60–90 |
| Oregano | — | — | Jun 17 | — | Aug 19 – Oct 28 | 60–90 |
| Parsley | May 6 | May 27 | Jun 3 | Jul 5 | Aug 5 – Oct 7 | 60–80 |
| Rue | — | — | Jun 17 | — | Aug 26 – Oct 28 | 70–90 |
| Sage | — | — | Jun 17 | — | Sep 2 – Oct 28 | 75–90 |
| Savory | — | — | Jun 17 | — | Aug 12 – Oct 7 | 50–70 |
| Sorrel | May 6 | May 27 | Jun 3 | Jul 5 | Jul 15 – Sep 16 | 40–60 |
| Tarragon | — | — | Jun 17 | — | Aug 19 – Oct 28 | 60–90 |
| Thai Basil | Apr 22 | Jun 17 | Jun 24 | — | Aug 19 – Oct 21 | 50–75 |
| Thyme | — | — | Jun 17 | — | Aug 26 – Oct 28 | 70–90 |
| Valerian | — | — | Jun 17 | — | Oct 21 – Dec 2 | 120–180 |
🌸 Flowers to Grow in Mineral County
51 flowers that grow well in Zone 5a with planting dates for Mineral County.
Show all 51 flowers with planting dates
| Plant | Start Indoors | Direct Sow | Transplant | Fall Plant | Bloom | Days to Maturity |
|---|---|---|---|---|---|---|
| Ageratum | Apr 22 | Jun 17 | Jun 17 | — | Aug 12 – Nov 4 | 60–75 |
| Alliums | — | — | — | Aug 2 | Sep 6 – Oct 4 | 28–42 |
| Anemones | May 13 | — | Jun 10 | — | Jul 22 – Aug 19 | 90–120 |
| Astilbe | Apr 8 | — | Jun 24 | — | Sep 9 – Nov 11 | 70–100 |
| Bachelor's Button | Apr 29 | May 20 | Jun 10 | — | Aug 12 – Oct 21 | 60–90 |
| Begonias | Apr 1 | — | Jun 17 | — | Aug 26 – Nov 18 | 70–90 |
| Black-eyed Susan | Apr 8 | Jun 10 | Jun 24 | — | Sep 9 – Dec 9 | 60–80 |
| Bleeding Hearts | Apr 8 | — | Jun 24 | — | Aug 19 – Sep 30 | 60–90 |
| Calendula | Apr 29 | May 20 | Jun 10 | — | Jul 29 – Oct 21 | 50–70 |
| Celosia | May 6 | Jun 24 | Jun 24 | — | Aug 26 – Nov 25 | 60–90 |
| Columbine | Apr 8 | Jun 24 | Jun 24 | — | Aug 19 – Sep 30 | 70–100 |
| Coreopsis | Apr 8 | Jun 17 | Jun 24 | — | Sep 2 – Dec 9 | 60–80 |
| Cosmos | May 13 | Jun 17 | Jun 17 | — | Aug 26 – Nov 18 | 60–90 |
| Crocus | — | — | — | Aug 2 | Jun 14 – Jul 5 | 10–20 |
| Daffodils | — | — | — | Aug 2 | Jun 21 – Jul 12 | 20–40 |
| Dahlias | May 13 | Jun 17 | Jun 17 | — | Sep 9 – Dec 2 | 70–120 |
| Daylily | Apr 8 | — | Jun 24 | — | Sep 16 – Dec 9 | 60–90 |
| Dianthus | Apr 8 | May 13 | May 27 | — | Jul 15 – Sep 30 | 60–80 |
| Echinacea (Purple Coneflower) | Apr 8 | Jun 24 | Jun 24 | — | Sep 16 – Dec 9 | 70–90 |
| Foxglove | Apr 8 | Jun 24 | Jun 24 | — | Aug 19 – Sep 30 | 80–120 |
| Gaillardia (Blanket Flower) | Apr 15 | Jun 24 | Jun 24 | — | Sep 2 – Dec 23 | 70–100 |
| Geraniums | Apr 1 | — | Jun 17 | — | Aug 26 – Nov 18 | 70–100 |
| Gladiolus | — | Jun 17 | Jun 17 | — | Sep 9 – Dec 2 | 70–100 |
| Hostas | Apr 1 | — | Jun 24 | — | Sep 16 – Dec 9 | 60–90 |
| Hyacinths | — | — | — | Aug 2 | Jul 12 – Aug 9 | 14–28 |
| Hydrangeas | Apr 1 | — | Jun 24 | — | Sep 9 – Nov 25 | 90–150 |
| Impatiens | Apr 15 | — | Jun 17 | — | Aug 26 – Nov 18 | 60–75 |
| Irises | — | Division | Jun 24 | — | Aug 19 – Sep 23 | 60–100 |
| Larkspur | — | May 13 | — | — | Jul 22 – Sep 16 | 60–90 |
| Lavender | Apr 1 | — | Jul 1 | — | Sep 9 – Oct 21 | 90–120 |
| Lilies | — | Division | Jun 24 | — | Sep 2 – Nov 25 | 70–120 |
| Lobelia | Apr 1 | — | Jun 3 | — | Jul 29 – Oct 7 | 70–80 |
| Lupine | Apr 8 | Jun 24 | Jun 24 | — | Aug 19 – Sep 30 | 75–100 |
| Marigolds | Apr 29 | Jun 17 | Jun 17 | — | Aug 12 – Nov 4 | 50–70 |
| Nasturtium | May 13 | Jun 17 | Jun 17 | — | Aug 12 – Nov 18 | 55–65 |
| Pansy | Apr 1 | — | Jun 10 | — | Aug 5 – Sep 30 | 70–90 |
| Peonies | — | Division | Jun 24 | — | Sep 2 – Oct 14 | 90–120 |
| Petunia | Apr 15 | — | Jun 17 | — | Aug 26 – Nov 18 | 70–90 |
| Phlox | Apr 8 | Jun 24 | Jun 24 | — | Sep 9 – Nov 25 | 80–110 |
| Portulaca | May 6 | Jun 24 | Jun 24 | — | Aug 12 – Nov 11 | 50–70 |
| Roses | Apr 1 | — | Jun 24 | — | Sep 9 – Dec 9 | 90–180 |
| Salvia | Apr 8 | — | Jun 17 | — | Aug 26 – Nov 18 | 70–90 |
| Sedum (Stonecrop) | Apr 8 | — | Jun 24 | — | Oct 21 – Dec 23 | 60–90 |
| Snapdragon | Apr 1 | May 27 | Jun 10 | — | Aug 19 – Oct 21 | 70–100 |
| Sunflower | May 20 | Jun 17 | Jun 17 | — | Sep 9 – Nov 18 | 70–100 |
| Sweet Alyssum | Apr 22 | May 27 | Jun 10 | — | Jul 22 – Sep 30 | 45–60 |
| Sweet Pea | Apr 29 | May 6 | Jun 10 | — | Aug 26 – Oct 28 | 65–85 |
| Tulips | — | — | — | Aug 2 | Jul 5 – Jul 26 | 15–30 |
| Vinca (Annual) | Mar 25 | — | Jun 24 | — | Sep 2 – Nov 18 | 70–90 |
| Yarrow | Apr 8 | Jun 10 | Jun 24 | — | Sep 2 – Dec 9 | 60–90 |
| Zinnia | May 13 | Jun 17 | Jun 17 | — | Aug 26 – Nov 18 | 60–70 |
Monthly Planting Guide for Mineral County
Gardening Guides & Resources
Helpful guides from The Ultimate Homestead to improve your garden in Mineral County.
Frequently Asked Questions
What planting zone is Mineral County, CO?
Mineral County is in USDA Hardiness Zone 5a. This zone classification determines which perennial plants survive winter and sets the baseline for frost timing across the county.
When is the last frost in Mineral County, CO?
Based on 31 years of NOAA weather station data, the median last spring frost in Mineral County falls around June 10. In 8 out of 10 years, last frost lands between May 20 and June 26 — a 37-day window of variability. Use June 26 as your conservative safe-to-plant date for frost-sensitive crops.
When is the first fall frost in Mineral County, CO?
The median first fall frost in Mineral County arrives around September 13. In cold years it can arrive as early as August 13; in mild years as late as September 30. Harvest or protect frost-sensitive crops — tomatoes, peppers, basil, squash — before this date.
How long is the growing season in Mineral County?
Mineral County has a frost-free growing season of approximately 95 days. Focus on short-season varieties and start warm-season crops indoors 6–8 weeks before last frost. Climate records show the growing season is trending longer by about 2.52 days per decade.
What is the soil like in Mineral County for gardening?
Mineral County has predominantly Loam soil with a pH range of 6.8–8 and Excessively Drained drainage. Most vegetables and herbs grow well with standard composting and seasonal soil amendment.
What is grown commercially in Mineral County?
Mineral County has commercial agriculture that includes Cattle, Hay, Wheat, Sugar Beets. These crops reflect the local climate and soil conditions — what succeeds commercially often translates well to home gardens in the same area.
Is Mineral County a good location for home gardening?
Mineral County scores 28/100 (Challenging) on our Microclimate Index, which combines frost reliability, drought pressure, soil challenge, elevation risk, and long-term climate trend. Gardening here benefits from close attention to frost timing and season extension due to the challenging microclimate factors.
Your Mineral County Garden Planner — Free
A 22-page printable planner built for Mineral County (Zone 5a). Planting dates, a month-by-month schedule, harvest log, seed inventory, and succession charts — all dialed in for your exact growing season.
The Gardener's Encyclopedia to Companion Planting
The pairings that make vegetables, herbs, and flowers grow better — and the ones that quietly wreck a bed.
- Proven pairings for 200+ vegetables, herbs, flowers, and fruits
- Full seed-starting + planting schedule with timing and spacing
- Bonus: square-foot gardening guide + printable seasonal planners
Seed Saving & Storage Guide
Most saved seeds go bad before next season. This shows exactly when to pick, how to dry, and where to store seeds from 200 plants so yours don't.
- 200 plants, step-by-step: life cycle, pollination type, isolation
- Exact temperature + humidity ranges that keep seeds viable
- Bonus: searchable Google Sheets tracker + custom GPT assistant
Composting Guide for Homesteaders
Turn kitchen scraps and yard waste into compost that actually feeds the garden — instead of a pile that smells, attracts pests, and never breaks down.
- 14 sections on composting methods, soil science, and troubleshooting
- The 7-step hot-compost system from start to finish
- Bonus tools: troubleshooting chart, safety guide, monitoring log