Custer, MI — Planting Guide for July
Free PDF, personalized for your town's frost dates & climate. Drop your email — we'll send the link.
July in Mason County, Michigan — your action list
July rewards gardeners who work with the weather, not against it. Here's how to stay in step this month in Mason County, Michigan.
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Start basil, peppers, and pole beans under lights
Bottom-water once the first true leaves appear — it keeps stems dry and knocks back damping-off.
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Bring in the basil, carrots, and cucumber
If you can't use it all right away, check the food-preservation section of your planner.
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Plant your fall garden: carrots, kale, and lettuce
Keep young seedlings shaded and moist in summer heat. A row of taller crops works as natural shade.
August prep starts now
- First harvests: basil, carrots, and cucumber
- Fall sowing: alliums, bachelor's button, and crocus
Custer has a classic four-season growing climate (Zone 6a). The last spring frost typically lands around May 15 and the first fall frost arrives around October 7 — a 145-day frost-free season that's long enough for tomatoes, peppers, melons, and a full succession of cool-weather crops on either side. The trick is timing: start warm-season seedlings indoors 6–8 weeks before last frost, harden them off, and plant out the week after your local frost date is statistically safe.
Soils trend Silt Loam — the gold standard for vegetables. Add 2–3" of compost annually to maintain it and you'll outgrow most of your neighbors.
Drought pressure is moderate (13.1 weeks/year on average). Mulching and drip irrigation pay for themselves quickly.
🌡️ USDA Zone
6a (-10°F to -5°F min)
❄️ Avg. Last Frost
May 15
🍂 Avg. First Frost
October 7
📅 Growing Season
145 days
🌧️ Climate
Unknown 0.0" annual
💨 Wind
Unknown 0.0 mph avg
🥶 Frost Tier
Regular 0% frost-free years
🏜️ Drought
13.1 wk/yr trend stable
📍 ZIP Codes
1 ZIP
Monthly Watering Calendar for Custer
When you'll need to water your garden — based on average monthly rainfall vs. the ~1 inch/week most gardens need.
For new gardeners: The 1-inch-per-week rule applies to most vegetable crops. Custer averages 0" a year — divide by 52 and compare to that 1" target. Some months are above, some below; that's where the calendar earns its keep.
View detailed monthly data
| Month | Avg Rainfall | Rainy Days | Extra Water Needed | Watering Effort |
|---|---|---|---|---|
| Jan | 1.3 in | 9 days | — | None |
| Feb | 1.7 in | 6 days | — | None |
| Mar | 2.5 in | 10 days | — | None |
| Apr | 3.1 in | 10 days | 1.2 in | Moderate |
| May | 3.3 in | 10 days | 1 in | Moderate |
| Jun | 4.5 in | 11 days | — | Low |
| Jul | 4.1 in | 8 days | 0.2 in | Low |
| Aug | 3.9 in | 8 days | 0.4 in | Low |
| Sep | 3.3 in | 8 days | 1 in | Moderate |
| Oct | 2.9 in | 7 days | 1.4 in | Moderate |
| Nov | 2.1 in | 7 days | — | None |
| Dec | 1.7 in | 8 days | — | None |
Annual total: 34.4 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.
Custer Soil Profile
Soil Type
Silt Loam
Soil pH
6-7.3
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) | May 29 | Oct 23 | 147 days |
| Cautious | May 20 | Oct 13 | 146 days |
| Average year | May 15 | Oct 7 | 145 days |
| Optimistic | May 8 | Oct 1 | 146 days |
| Aggressive (risky) | Apr 27 | Sep 21 | 147 days |
Not very — frost dates can vary by ±32 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 1.9 days per decade). Spring is arriving earlier than it used to. Good news for gardeners.
Gardening Difficulty Score
Mason County offers good growing conditions. A little planning around frost dates goes a long way.
Local Gardening Help in Mason 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 Mason County's climate and soil.
County Extension Office
Mason County Michigan State University Extension Extension Office
Phone: 517-355-0240
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 Mason County
Finding local nurseries & garden centers in Mason County
Why Buy Local
Local nurseries carry plants that are proven to grow in your area. Staff can give you advice specific to Mason 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 Mason County MI" or "garden center Mason 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 Mason County MI" or check your extension office and local parks department. Facebook groups like "Mason County Gardeners" or "Michigan 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.
Show 6 more succession options
Sunlight & Day Length in Custer
Monthly daylight hours and peak sun — critical for onion varieties, photoperiod-sensitive plants, and solar garden planning.
What this means for you: Plants use day length as their seasonal clock. Some crops flower when days lengthen (most flowers), some when days shorten (chrysanthemums, soybeans). Custer's curve is the timing layer beneath everything you grow.
Longest Day
15.3 hours
Summer solstice daylight
Shortest Day
8.7 hours
Winter solstice daylight
Peak Sun Hours
9.9 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 | 9.1 hr | 3.6 hr | Short day |
| February | 10.2 hr | 4.7 hr | Short day |
| March | 11.6 hr | 5.8 hr | Short day |
| April | 13.2 hr | 6.9 hr | Neutral |
| May | 14.6 hr | 8.7 hr | Long day |
| June | 15.3 hr | 9.9 hr | Long day |
| July | 15 hr | 9.7 hr | Long day |
| August | 13.8 hr | 8.7 hr | Neutral |
| September | 12.3 hr | 6.8 hr | Neutral |
| October | 10.7 hr | 5.6 hr | Short day |
| November | 9.4 hr | 3.9 hr | Short day |
| December | 8.7 hr | 3.5 hr | Short day |
Peak sun hours factor in typical cloud cover — use these for solar panel and shade-planning calculations.
Soil Temperature & Composting in Custer
Monthly soil temps tell you when to plant warm-season crops, and when your compost pile is actively working.
The practical takeaway: Most root crops germinate well at 50-60°F. Most fruit-bearing crops want 65-75°F. Custer's monthly soil curve maps these windows to actual months.
Plant Warm Crops When
Soil reaches 60°F+
Soil warm enough from Jun through Sep.
Best Month to Compost
Jun
Microbial activity peaks when soil is warm.
Active Composting
6 months
Solid season. Piles go dormant in winter.
View detailed monthly data
| Month | Soil 4" Deep | Soil 8" Deep | Compost Activity | Time to Finish |
|---|---|---|---|---|
| Jan | 21°F | 31°F | ❄️ Dormant | ~36 weeks |
| Feb | 24°F | 29°F | ❄️ Dormant | ~36 weeks |
| Mar | 31°F | 35°F | ❄️ Dormant | ~36 weeks |
| Apr | 44°F | 43°F | 🐢 Slow | ~24 weeks |
| May | 55°F | 53°F | ♻️ Active | ~14 weeks |
| Jun | 69°F | 64°F | 🔥 Peak | ~8 weeks |
| Jul | 77°F | 69°F | 🔥 Peak | ~8 weeks |
| Aug | 78°F | 71°F | 🔥 Peak | ~8 weeks |
| Sep | 71°F | 69°F | 🔥 Peak | ~8 weeks |
| Oct | 58°F | 58°F | ♻️ Active | ~14 weeks |
| Nov | 40°F | 47°F | 🐢 Slow | ~24 weeks |
| Dec | 28°F | 37°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 Custer
Computed from local climate patterns — warmer, humid conditions increase pest generations and fungal disease risk.
The practical takeaway: Pollinators are the good bugs. Pest pressure is the bad bugs. Custer's climate makes both more abundant in warm humid regions, and rarer in cold dry ones — plan habitat to encourage the good while managing the bad.
Insect Pest Pressure
Moderate — common pests appear but manageable with monitoring.
Disease Risk
Low disease risk — dry conditions reduce fungal problems.
Seasonal Risk
View 6 common pests in your area
| Pest | Risk Level | Peak Months |
|---|---|---|
| Aphids | Moderate | May, Jun, Jul, Aug |
| Japanese beetles | Moderate | Jun, Jul, Aug |
| Squash bugs | Moderate | Jun, Jul, Aug |
| Tomato hornworms | Moderate | Jul, Aug |
| Cabbage loopers | Low | May, Jun, Jul, Aug |
| Slugs | Low | Apr, May, Jun |
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 Custer
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 do four things at once: fix nitrogen (legumes), suppress weeds (any), prevent erosion, and add organic matter when chopped down. Custer's seasonal pattern determines which species fit which gap.
Spring Cover Crops (3 options) — Build soil before the main growing season
| Crop | Plant By | Terminate | N-Fixing | Soil Benefit |
|---|---|---|---|---|
| Buckwheat | May 21 | Aug 5 | — | Rapid growth, attracts pollinators, suppresses weeds |
| Sorghum-sudan grass | May 18 | Aug 5 | — | Massive biomass, breaks compaction, suppresses nematodes |
| White clover | Apr 15 | Aug 5 | ✓ 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 8 | Sep 16 | — | Deep roots break compaction, attract pollinators and beneficial insects |
Fall Cover Crops (6 options) — Plant after harvest to protect soil over winter
| Crop | Plant By | Terminate | N-Fixing | Soil Benefit |
|---|---|---|---|---|
| Austrian winter peas | Aug 2 | Apr 24 | ✓ Yes | Fixes nitrogen, good for heavy clay soils |
| Daikon radish | Aug 23 | May 1 | — | Deep taproot breaks compaction, excellent for clay soils |
| Hairy vetch | Jul 16 | Apr 24 | ✓ Yes | Excellent nitrogen fixer, good for depleted soils |
| Oats | Sep 1 | Apr 24 | — | Quick biomass, winterkills in cold zones — no spring tillage needed |
| Winter rye | Jul 8 | Apr 24 | — | Suppresses weeds, prevents erosion, breaks up compacted soil |
| Winter wheat | Jul 2 | May 1 | — | Erosion control, weed suppression, good biomass |
Wind & Microclimate in Custer
Quick context: Wind shapes the garden you don't think about: bee paths, evaporation, structural stress on tomato cages. Custer's 0.0 mph background level is a baseline you should know before placing the tallest crops (sunflowers, pole beans, sweet corn).
Wind dries soil, stresses plants, and affects frost patterns. Understanding your exposure helps with garden placement.
Seasonal Wind Speed
Spring: 12 mph Summer: 10 mph
Fall: 11 mph Winter: 12 mph
Prevailing wind: SW. Moderate wind — consider a temporary windbreak for young seedlings.
Windbreak Benefit
7.2/10
Strongly recommended — a windbreak (fence, hedge, or row of tall crops like corn or sunflowers) will significantly improve garden yields.
Frost Pocket Risk
Low
Relatively flat terrain (291 ft range). Frost pocket risk is minimal — garden placement is flexible.
Rainwater Harvesting in Custer
How much water you can collect, when to collect it, and what size system you need for your garden.
What this means for you: A single rain barrel under a downspout catches 50 gallons in a 0.5" storm. Custer's 0" annual rainfall means even modest harvesting systems quickly amortize their cost in water savings.
Annual Collection
17,144 gal
Per 1,000 sq ft of roof area (at 80% collection efficiency)
Recommended Setup
6 rain barrels (55 gal each)
For a typical 500 sq ft garden. Serious collectors: consider a 1,750 gal tank.
Legal Status
Unrestricted
Rainwater harvesting is fully legal in your state with no restrictions.
Best Collection Months
May, Jun, Jul, Aug
Highest rainfall months — your barrels will fill up quickly during these months.
Months to Draw From Storage
Jan, Feb, 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 34.4 inches of rain per year
- A 1,000 sq ft roof can collect roughly 17,144 gallons annually
- Rainwater harvesting is fully legal in your state
- Stock up on stored water before your dry season (Jan, Feb, Dec)
- Use a first-flush diverter to keep roof debris out of your collection
🥬 Vegetables to Grow in Custer
107 vegetables matched to Zone 6a with planting dates calibrated for Custer.
Show all 107 vegetables with dates
| Plant | Start Indoors | Direct Sow | Transplant | Fall Plant | Harvest | Days to Maturity |
|---|---|---|---|---|---|---|
| Acorn Squash | Apr 10 | May 22 | May 29 | — | Aug 21 – Sep 25 | 80–100 |
| Amaranth | Mar 20 | May 22 | May 29 | — | Aug 28 – Oct 16 | 90–120 |
| Arugula | Apr 10 | May 1 | May 15 | Jul 29 | Jun 19 – Aug 21 | 30–50 |
| Asparagus | — | — | May 29 | — | — | 730–1095 |
| Beets | — | May 1 | — | Jul 29 | Jun 26 – Jul 24 | 50–70 |
| Belgian Endive | Apr 10 | May 1 | May 15 | Jul 29 | Sep 4 – Oct 30 | 110–150 |
| Bitter Melon | Mar 20 | May 22 | May 29 | — | Jul 31 – Sep 11 | 60–90 |
| Black Beans | — | May 22 | — | — | Aug 21 – Oct 9 | 90–120 |
| Bok Choy | Apr 10 | May 1 | May 15 | Jul 29 | Jun 26 – Jul 31 | 40–60 |
| Broccoli | Apr 10 | May 1 | May 15 | Jul 29 | Jul 17 – Aug 28 | 60–90 |
| Broccoli Rabe | Apr 10 | May 1 | May 15 | Jul 29 | Jun 26 – Jul 31 | 40–60 |
| Brussels Sprouts | Apr 10 | May 1 | May 15 | Jul 29 | Aug 14 – Oct 9 | 90–130 |
| Butternut Squash | Apr 10 | May 22 | May 29 | — | Aug 28 – Oct 2 | 85–110 |
| Cabbage | Apr 10 | May 1 | May 15 | Jul 29 | Jul 17 – Sep 11 | 60–100 |
| Calabash | Mar 20 | May 22 | May 29 | — | Aug 21 – Oct 16 | 80–120 |
| Carrots | — | May 1 | — | Jul 29 | Jul 3 – Aug 7 | 60–80 |
| Cauliflower | Apr 10 | May 1 | May 15 | Jul 29 | Jul 10 – Sep 11 | 55–100 |
| Celeriac | Apr 10 | May 1 | May 15 | Jul 29 | Aug 28 – Oct 2 | 100–120 |
| Celery | Apr 10 | May 1 | May 15 | Jul 29 | Aug 7 – Oct 2 | 80–120 |
| Celtuce | Apr 10 | May 1 | May 15 | Jul 29 | Jul 17 – Aug 28 | 60–90 |
| Chard | Apr 10 | May 1 | May 15 | Jul 29 | Jul 10 – Aug 28 | 50–60 |
| Chickpeas | Apr 10 | May 1 | May 15 | Jul 29 | Aug 7 – Sep 18 | 80–110 |
| Chicory | Apr 10 | May 1 | May 15 | Jul 29 | Jul 17 – Aug 28 | 60–85 |
| Chinese Cabbage | Apr 10 | May 1 | May 15 | Jul 29 | Jul 10 – Aug 7 | 50–70 |
| Christmas Lima Beans | Mar 20 | May 22 | May 29 | — | Aug 21 – Sep 25 | 80–100 |
| Collard Greens | Apr 10 | May 1 | May 15 | Jul 29 | Jul 10 – Sep 11 | 55–75 |
| Corn | — | May 22 | — | — | Jul 24 – Sep 18 | 60–100 |
| Cowpeas | — | May 22 | — | — | Jul 24 – Sep 4 | 60–90 |
| Cress | Apr 10 | May 1 | May 15 | Jul 29 | May 29 – Jun 19 | 14–21 |
| Crookneck Squash | Apr 10 | May 22 | May 29 | — | Jul 17 – Aug 14 | 45–60 |
| Crosne | — | May 1 | — | Jul 29 | Oct 2 – Nov 13 | 150–200 |
| Cucumber | Apr 10 | May 22 | May 29 | — | Jul 24 – Sep 18 | 50–70 |
| Daikon | — | May 1 | — | Jul 29 | Jun 26 – Jul 24 | 50–70 |
| Delicata Squash | Apr 10 | May 22 | May 29 | — | Aug 21 – Sep 25 | 80–100 |
| Edamame | — | May 22 | — | — | Aug 7 – Sep 18 | 75–100 |
| Eggplant | Mar 6 | May 22 | May 29 | — | Aug 7 – Oct 9 | 65–85 |
| Endive | Apr 10 | May 1 | May 15 | Jul 29 | Jul 3 – Aug 7 | 45–65 |
| Escarole | Apr 10 | May 1 | May 15 | Jul 29 | Jul 10 – Aug 7 | 50–70 |
| Fava Beans | Apr 10 | May 1 | May 15 | Jul 29 | Jul 31 – Sep 11 | 75–100 |
| Fennel | Mar 20 | May 22 | May 29 | — | Jul 31 – Sep 11 | 60–90 |
| Garlic | — | — | — | Aug 26 | Nov 25 – Mar 10 | 90–240 |
| Green Beans | — | May 22 | — | — | Jul 17 – Sep 11 | 50–65 |
| Horseradish | — | — | May 29 | — | Oct 2 – Dec 11 | 120–180 |
| Hot Peppers | Mar 6 | May 22 | May 29 | — | Aug 7 – Nov 13 | 70–120 |
| Hubbard Squash | Apr 10 | May 22 | May 29 | — | Sep 11 – Oct 16 | 100–120 |
| Kabocha | Apr 10 | May 22 | May 29 | — | Aug 28 – Sep 25 | 85–100 |
| Kai Lan | Apr 10 | May 1 | May 15 | Jul 29 | Jul 3 – Jul 31 | 45–60 |
| Kale | Apr 10 | May 1 | May 15 | Jul 29 | Jul 10 – Sep 4 | 50–70 |
| Kidney Beans | — | May 22 | — | — | Aug 21 – Sep 25 | 85–110 |
| Kohlrabi | Apr 10 | May 1 | May 15 | Jul 29 | Jul 3 – Aug 7 | 45–65 |
| Komatsuna | Apr 10 | May 1 | May 15 | Jul 29 | Jun 19 – Jul 24 | 35–50 |
| Leeks | Apr 10 | May 1 | May 15 | Jul 29 | Aug 14 – Oct 30 | 90–150 |
| Lentils | Apr 10 | May 1 | May 15 | Jul 29 | Aug 7 – Sep 18 | 80–110 |
| Lettuce | Apr 10 | May 1 | May 15 | Jul 29 | Jun 19 – Aug 28 | 30–60 |
| Lima Beans | — | May 22 | — | — | Jul 24 – Sep 4 | 60–90 |
| Loofah | Mar 20 | May 22 | May 29 | — | Sep 11 – Nov 13 | 100–150 |
| Luffa | Mar 20 | May 22 | May 29 | — | Aug 28 – Nov 13 | 90–150 |
| Mache | Apr 10 | May 1 | May 15 | Jul 29 | Jun 26 – Jul 31 | 40–60 |
| Melon | Apr 10 | May 22 | May 29 | — | Aug 7 – Sep 25 | 70–100 |
| Microgreens | Apr 10 | May 1 | May 15 | Jul 29 | May 22 – Jun 19 | 7–21 |
| Mitsuba | Apr 10 | May 1 | May 8 | Jul 29 | Jul 3 – Aug 28 | 50–70 |
| Mizuna | Apr 10 | May 1 | May 15 | Jul 29 | Jun 19 – Jul 17 | 30–45 |
| Mustard Greens | Apr 10 | May 1 | May 15 | Jul 29 | Jun 19 – Aug 21 | 30–50 |
| Napa Cabbage | Apr 10 | May 1 | May 15 | Jul 29 | Jul 10 – Aug 14 | 55–75 |
| New Zealand Spinach | Mar 20 | May 22 | May 29 | — | Jul 24 – Aug 21 | 55–70 |
| Okra | Mar 20 | May 22 | May 29 | — | Jul 24 – Sep 18 | 50–65 |
| Onion | Apr 10 | May 1 | May 15 | Jul 29 | Aug 14 – Oct 2 | 90–120 |
| Pac Choi | Apr 10 | May 1 | May 15 | Jul 29 | Jun 26 – Jul 24 | 40–55 |
| Parsnip | — | May 1 | — | Jul 29 | Aug 14 – Sep 25 | 100–130 |
| Patty Pan Squash | Apr 10 | May 22 | May 29 | — | Jul 17 – Aug 14 | 45–60 |
| Peas | Apr 10 | May 1 | May 15 | Jul 29 | Jul 10 – Sep 4 | 55–70 |
| Peppers | Mar 6 | May 22 | May 29 | — | Jul 31 – Oct 9 | 60–90 |
| Pole Beans | Mar 20 | May 22 | May 29 | — | Jul 24 – Sep 18 | 55–70 |
| Potatoes | Mar 20 | May 22 | May 29 | — | Aug 7 – Oct 16 | 70–120 |
| Pumpkin | Apr 10 | May 22 | May 29 | — | Aug 28 – Oct 16 | 85–120 |
| Purslane | Apr 10 | May 1 | May 15 | Jul 29 | Jun 26 – Jul 31 | 40–60 |
| Radicchio | Apr 10 | May 1 | May 15 | Jul 29 | Jul 17 – Aug 21 | 60–80 |
| Radish | — | May 1 | — | Jul 29 | May 29 – Jun 19 | 22–35 |
| Rhubarb | — | — | Jun 5 | — | — | 365–730 |
| Romanesco | Apr 10 | May 1 | May 15 | Jul 29 | Jul 31 – Sep 11 | 75–100 |
| Rutabaga | — | May 1 | — | Jul 29 | Jul 24 – Aug 28 | 80–100 |
| Salsify | — | May 1 | — | Jul 29 | Aug 14 – Sep 25 | 100–130 |
| Savoy Cabbage | Apr 10 | May 1 | May 15 | Jul 29 | Jul 24 – Sep 18 | 70–110 |
| Scallions | Apr 10 | May 1 | May 15 | Jul 29 | Jul 10 – Aug 7 | 50–70 |
| Scarlet Runner Beans | Mar 20 | May 22 | May 29 | — | Jul 31 – Sep 4 | 60–80 |
| Shallot | Apr 10 | May 1 | May 15 | Jul 29 | Aug 14 – Oct 2 | 90–120 |
| Shiso | Mar 27 | May 22 | May 29 | — | Jul 24 – Sep 18 | 50–70 |
| Snap Peas | Mar 20 | May 22 | May 29 | — | Jul 24 – Sep 18 | 55–70 |
| Snow Peas | Apr 10 | May 1 | May 15 | Jul 29 | Jul 10 – Sep 4 | 50–65 |
| Soybeans | — | May 22 | — | — | Aug 14 – Oct 9 | 80–120 |
| Spaghetti Squash | Apr 10 | May 22 | May 29 | — | Aug 28 – Sep 25 | 85–100 |
| Spinach | Apr 10 | May 1 | May 15 | Jul 29 | Jun 19 – Aug 21 | 35–50 |
| Squash (Summer) | Apr 10 | May 22 | May 29 | — | Jul 17 – Sep 18 | 45–65 |
| Squash (Winter) | Apr 10 | May 22 | May 29 | — | Aug 21 – Oct 16 | 80–120 |
| Sunchoke | — | — | May 29 | — | Sep 18 – Nov 13 | 110–150 |
| Sweet Corn | — | May 22 | — | — | Jul 24 – Sep 4 | 60–90 |
| Sweet Potatoes | Mar 20 | May 22 | May 29 | — | Aug 28 – Oct 16 | 90–120 |
| Tatsoi | Apr 10 | May 1 | May 15 | Jul 29 | Jun 19 – Jul 24 | 35–50 |
| Tomatillo | Mar 20 | May 22 | May 29 | — | Jul 31 – Oct 9 | 60–85 |
| Tomatoes | Mar 20 | May 22 | May 29 | — | Jul 31 – Oct 9 | 60–85 |
| Turnip | — | May 1 | — | Jul 29 | Jun 12 – Jul 17 | 40–60 |
| Watercress | Apr 10 | May 1 | May 15 | Jul 29 | Jun 26 – Jul 31 | 40–60 |
| Watermelon | Apr 10 | May 22 | May 29 | — | Aug 7 – Sep 25 | 70–100 |
| Wax Beans | — | May 22 | — | — | Jul 17 – Sep 11 | 50–65 |
| Winter Melon | Mar 20 | May 22 | May 29 | — | Aug 28 – Oct 16 | 90–120 |
| Yard Long Beans | Mar 20 | May 22 | May 29 | — | Jul 24 – Sep 4 | 55–80 |
| Zucchini | Apr 10 | May 22 | May 29 | — | Jul 17 – Sep 11 | 45–60 |
🍓 Fruits to Grow in Custer
27 fruits matched to Zone 6a with planting dates calibrated for Custer.
Show all 27 fruits with dates
| Plant | Start Indoors | Direct Sow | Transplant | Fall Plant | Harvest | Days to Maturity |
|---|---|---|---|---|---|---|
| Alpine Strawberries | — | — | Jun 5 | — | Sep 4 – Dec 18 | 90–180 |
| Aronia | — | — | Jun 5 | — | — | 730–1095 |
| Blackberries | — | — | Jun 5 | — | — | 365–730 |
| Blueberries | — | — | Jun 5 | — | — | 730–1095 |
| Boysenberries | — | — | Jun 5 | — | — | 365–730 |
| Cantaloupe | — | — | Jun 5 | — | Aug 14 – Sep 18 | 70–90 |
| Che Fruit | — | — | Jun 5 | — | — | 1095–1825 |
| Cranberries | — | — | Jun 5 | — | — | 730–1095 |
| Currants | — | — | Jun 5 | — | — | 730–1095 |
| Elderberries | — | — | Jun 5 | — | — | 730–1095 |
| Goji Berries | — | — | Jun 5 | — | — | 730–1095 |
| Gooseberries | — | — | Jun 5 | — | — | 730–1095 |
| Grapes | — | — | Jun 5 | — | — | 730–1095 |
| Ground Cherry | — | — | Jun 5 | — | Aug 14 – Oct 9 | 65–80 |
| Hardy Kiwi | — | — | Jun 5 | — | — | 1095–1825 |
| Haskaps | — | — | Jun 5 | — | — | 730–1095 |
| Honeydew | — | — | Jun 5 | — | Aug 28 – Oct 9 | 80–110 |
| Jostaberry | — | — | Jun 5 | — | — | 730–1095 |
| Lingonberries | — | — | Jun 5 | — | — | 730–1095 |
| Medlar | — | — | Jun 5 | — | — | 1095–1825 |
| Mulberries | — | — | Jun 5 | — | — | 730–1825 |
| Pawpaw | — | — | Jun 5 | — | — | 1095–2555 |
| Persimmon | — | — | Jun 5 | — | — | 1095–2555 |
| Quince | — | — | Jun 5 | — | — | 1095–1825 |
| Raspberries | — | — | Jun 5 | — | — | 365–730 |
| Serviceberries | — | — | Jun 5 | — | — | 730–1095 |
| Strawberries | — | — | Jun 5 | — | Sep 4 – Dec 18 | 90–365 |
🌿 Herbs to Grow in Custer
35 herbs matched to Zone 6a with planting dates calibrated for Custer.
Show all 35 herbs with dates
| Plant | Start Indoors | Direct Sow | Transplant | Fall Plant | Harvest | Days to Maturity |
|---|---|---|---|---|---|---|
| Angelica | Apr 10 | May 1 | May 8 | Jul 29 | — | 365–730 |
| Anise | Apr 10 | May 1 | May 8 | Jul 29 | Aug 7 – Oct 23 | 90–120 |
| Basil | Mar 27 | May 22 | May 29 | — | Jul 24 – Sep 25 | 50–75 |
| Bee Balm | — | — | May 22 | — | Aug 21 – Nov 6 | 90–120 |
| Borage | Apr 10 | May 1 | May 8 | Jul 29 | Jul 3 – Aug 21 | 50–60 |
| Caraway | Apr 10 | May 1 | May 8 | Jul 29 | — | 365–450 |
| Catnip | — | — | May 22 | — | Jul 24 – Sep 25 | 60–80 |
| Chamomile | Apr 10 | May 1 | May 8 | Jul 29 | Jul 10 – Sep 18 | 60–90 |
| Chervil | Apr 10 | May 1 | May 8 | Jul 29 | Jun 19 – Aug 21 | 40–60 |
| Chives | — | — | May 22 | — | Jul 24 – Oct 2 | 60–90 |
| Cilantro | Apr 10 | May 1 | May 8 | Jul 29 | Jun 19 – Aug 21 | 40–60 |
| Comfrey | — | — | May 22 | — | Jul 24 – Oct 2 | 60–90 |
| Cumin | Apr 10 | May 1 | May 8 | Jul 29 | Aug 21 – Oct 23 | 100–120 |
| Dill | Apr 10 | May 1 | May 8 | Jul 29 | Jun 19 – Aug 21 | 40–60 |
| Epazote | Mar 27 | May 22 | May 29 | — | Jul 17 – Sep 11 | 45–60 |
| Fennel (herb) | Apr 10 | May 1 | May 8 | Jul 29 | Jul 10 – Sep 18 | 60–90 |
| Feverfew | — | — | May 22 | — | Aug 21 – Nov 6 | 90–120 |
| Garlic Chives | — | — | May 22 | — | Jul 24 – Oct 2 | 60–90 |
| Horehound | — | — | May 22 | — | Aug 7 – Oct 2 | 75–90 |
| Hyssop | — | — | May 22 | — | Jul 31 – Oct 2 | 70–90 |
| Lemon Balm | — | — | May 22 | — | Jul 24 – Sep 11 | 60–70 |
| Lemon Thyme | — | — | May 22 | — | Jul 31 – Oct 2 | 70–90 |
| Lovage | — | — | May 22 | — | Jul 31 – Oct 2 | 70–90 |
| Marjoram | — | — | May 22 | — | Jul 24 – Oct 2 | 60–90 |
| Mint | — | — | May 22 | — | Jul 24 – Oct 2 | 60–90 |
| Oregano | — | — | May 22 | — | Jul 24 – Oct 2 | 60–90 |
| Parsley | Apr 10 | May 1 | May 8 | Jul 29 | Jul 10 – Sep 11 | 60–80 |
| Rue | — | — | May 22 | — | Jul 31 – Oct 2 | 70–90 |
| Sage | — | — | May 22 | — | Aug 7 – Oct 2 | 75–90 |
| Savory | — | — | May 22 | — | Jul 17 – Sep 11 | 50–70 |
| Sorrel | Apr 10 | May 1 | May 8 | Jul 29 | Jun 19 – Aug 21 | 40–60 |
| Tarragon | — | — | May 22 | — | Jul 24 – Oct 2 | 60–90 |
| Thai Basil | Mar 27 | May 22 | May 29 | — | Jul 24 – Sep 25 | 50–75 |
| Thyme | — | — | May 22 | — | Jul 31 – Oct 2 | 70–90 |
| Valerian | — | — | May 22 | — | Sep 25 – Dec 4 | 120–180 |
🌸 Flowers to Grow in Custer
53 flowers matched to Zone 6a with planting dates calibrated for Custer.
Show all 53 flowers with dates
| Plant | Start Indoors | Direct Sow | Transplant | Fall Plant | Bloom | Days to Maturity |
|---|---|---|---|---|---|---|
| Ageratum | Mar 27 | May 15 | May 15 | — | Jul 10 – Oct 16 | 60–75 |
| Alliums | — | — | — | Aug 26 | Sep 23 – Oct 21 | 28–42 |
| Anemones | Apr 17 | — | May 15 | — | Jun 19 – Jul 17 | 90–120 |
| Astilbe | Mar 13 | — | May 22 | — | Jul 31 – Oct 9 | 70–100 |
| Bachelor's Button | Apr 3 | Apr 17 | May 15 | Aug 26 | Jul 17 – Oct 2 | 60–90 |
| Begonias | Mar 6 | — | May 22 | — | Jul 31 – Oct 30 | 70–90 |
| Black-eyed Susan | Mar 13 | May 15 | May 22 | — | Aug 7 – Nov 20 | 60–80 |
| Bleeding Hearts | Mar 13 | — | May 22 | — | Jul 17 – Aug 21 | 60–90 |
| Calendula | Apr 3 | Apr 17 | May 15 | — | Jul 3 – Oct 2 | 50–70 |
| California Poppy | — | Apr 17 | — | — | Jun 26 – Aug 7 | 60–90 |
| Celosia | Apr 10 | May 22 | May 22 | — | Jul 24 – Nov 6 | 60–90 |
| Columbine | Mar 13 | May 29 | May 29 | — | Jul 24 – Aug 28 | 70–100 |
| Coreopsis | Mar 13 | May 22 | May 22 | — | Jul 31 – Nov 20 | 60–80 |
| Cosmos | Apr 17 | May 15 | May 15 | — | Jul 24 – Oct 30 | 60–90 |
| Crocus | — | — | — | Aug 26 | Jul 15 – Aug 5 | 10–20 |
| Daffodils | — | — | — | Aug 26 | Jul 22 – Aug 12 | 20–40 |
| Dahlias | Apr 17 | May 22 | May 22 | — | Aug 7 – Nov 20 | 70–120 |
| Daylily | Mar 13 | — | May 22 | — | Aug 7 – Nov 20 | 60–90 |
| Dianthus | Mar 20 | Apr 17 | May 1 | — | Jun 19 – Sep 18 | 60–80 |
| Echinacea (Purple Coneflower) | Mar 13 | May 29 | May 29 | — | Aug 21 – Nov 27 | 70–90 |
| Foxglove | Mar 13 | May 22 | May 22 | — | Jul 17 – Aug 21 | 80–120 |
| Gaillardia (Blanket Flower) | Mar 27 | May 22 | May 22 | — | Jul 31 – Dec 4 | 70–100 |
| Geraniums | Mar 6 | — | May 22 | — | Jul 31 – Oct 30 | 70–100 |
| Gladiolus | — | May 15 | May 15 | — | Jul 31 – Nov 13 | 70–100 |
| Hostas | Mar 6 | — | May 22 | — | Aug 7 – Nov 20 | 60–90 |
| Hyacinths | — | — | — | Aug 26 | Aug 12 – Sep 2 | 14–28 |
| Hydrangeas | Mar 6 | — | May 22 | — | Jul 31 – Nov 6 | 90–150 |
| Impatiens | Mar 20 | — | May 22 | — | Jul 31 – Nov 6 | 60–75 |
| Irises | — | Division | May 22 | — | Jul 17 – Aug 14 | 60–100 |
| Larkspur | — | Apr 17 | — | — | Jun 26 – Aug 21 | 60–90 |
| Lavender | Mar 6 | — | May 29 | — | Aug 7 – Oct 2 | 90–120 |
| Lilies | — | Division | May 22 | — | Jul 31 – Nov 6 | 70–120 |
| Lobelia | Mar 13 | — | May 1 | — | Jun 26 – Sep 18 | 70–80 |
| Lupine | Mar 13 | May 22 | May 22 | — | Jul 17 – Aug 21 | 75–100 |
| Marigolds | Apr 3 | May 22 | May 22 | — | Jul 17 – Oct 16 | 50–70 |
| Nasturtium | Apr 17 | May 22 | May 22 | — | Jul 17 – Nov 6 | 55–65 |
| Pansy | Mar 6 | — | May 15 | Aug 12 | Jul 10 – Sep 11 | 70–90 |
| Peonies | — | Division | May 22 | — | Jul 24 – Aug 28 | 90–120 |
| Petunia | Mar 20 | — | May 22 | — | Jul 31 – Nov 6 | 70–90 |
| Phlox | Mar 13 | May 22 | May 22 | — | Jul 31 – Oct 23 | 80–110 |
| Portulaca | Apr 10 | May 22 | May 22 | — | Jul 10 – Oct 23 | 50–70 |
| Ranunculus | Apr 3 | — | May 15 | — | Jun 26 – Jul 24 | 90–120 |
| Roses | Mar 6 | — | May 22 | — | Jul 31 – Nov 20 | 90–180 |
| Salvia | Mar 13 | — | May 22 | — | Jul 31 – Nov 6 | 70–90 |
| Sedum (Stonecrop) | Mar 13 | — | May 22 | — | Sep 11 – Nov 27 | 60–90 |
| Snapdragon | Mar 6 | Apr 24 | May 15 | — | Jul 24 – Oct 2 | 70–100 |
| Sunflower | Apr 24 | May 22 | May 22 | — | Aug 14 – Nov 6 | 70–100 |
| Sweet Alyssum | Mar 27 | Apr 24 | May 15 | — | Jun 26 – Sep 4 | 45–60 |
| Sweet Pea | Apr 3 | Apr 10 | May 15 | — | Jul 31 – Oct 9 | 65–85 |
| Tulips | — | — | — | Aug 26 | Aug 5 – Sep 2 | 15–30 |
| Vinca (Annual) | Mar 6 | — | May 22 | — | Jul 31 – Nov 6 | 70–90 |
| Yarrow | Mar 13 | May 15 | May 22 | — | Jul 31 – Nov 20 | 60–90 |
| Zinnia | Apr 17 | May 22 | May 22 | — | Jul 31 – Nov 6 | 60–70 |
Monthly Planting Guide for Custer
ZIP Codes in Custer
Click any ZIP to see its specific frost, soil, and climate measurements (some ZIPs differ noticeably from the town aggregate):
Gardening Guides & Resources
Helpful guides from The Ultimate Homestead to improve your garden in Mason County.
Your Mason County Garden Planner — Free
A 22-page printable planner built for Mason County (Zone 6a). 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