Clearwater County, MN — Planting Guide
May to-do list for Clearwater County, Minnesota
Welcome to May in Zone 3b. These are the moves that will have the biggest impact on your growing season.
-
Transplant kale, lettuce, and angelica outside
Pinch off the lowest leaves on each seedling before you plant — it reduces water loss while the roots catch up.
-
Seed carrots, cucumber, and green beans outdoors
Mark the row. Birds and stray feet both have opinions about unmarked beds.
-
Start harvesting cress and microgreens
Morning harvests are best — cooler temperatures mean crisper produce and longer fridge life.
Get ahead of June
- Transplants going out: cucumber, peppers, and pole beans
- Starting indoors: cucumber, kale, and lettuce
- First harvests: lettuce, radish, and arugula
Clearwater County is in USDA Zone 3b. The average last spring frost is May 15 and the first fall frost is September 28, giving you a growing season of approximately 136 days.
At an elevation of 1,074 ft, Clearwater County receives approximately 33.7 in of rainfall annually. Summer highs average 80°F with winter lows around -2°F. The predominant soil type is Silt Loam.
Based on 31 years of NOAA climate station data, the last frost date here varies by 30 days year to year — ranging from April 27 in warm years to May 28 in cold years. The growing season is trending longer by about 2.86 days per decade. Clearwater County scores 57/100 (Moderate) on the Microclimate Index.
🌡️ Zone
3b (°F to °F min)
❄️ Last Frost
May 15
🍂 First Frost
September 28
📅 Growing Season
136 days
⛰️ Elevation
1,074 ft
🌧️ Annual Rainfall
33.7 in
Monthly Watering Calendar
When you'll need to water your garden — based on average monthly rainfall vs. the ~1 inch/week most gardens need.
View detailed monthly data
| Month | Avg Rainfall | Rainy Days | Extra Water Needed | Watering Effort |
|---|---|---|---|---|
| Jan | 1.5 in | 8 days | — | None |
| Feb | 1.4 in | 7 days | — | None |
| Mar | 2.1 in | 9 days | — | None |
| Apr | 2.8 in | 10 days | — | None |
| May | 4.2 in | 10 days | 0.1 in | Low |
| Jun | 3.8 in | 9 days | 0.5 in | Low |
| Jul | 3.6 in | 8 days | 0.7 in | Moderate |
| Aug | 3.8 in | 9 days | 0.5 in | Low |
| Sep | 3.3 in | 8 days | 1 in | Moderate |
| Oct | 2.5 in | 9 days | — | None |
| Nov | 2.6 in | 7 days | — | None |
| Dec | 2.1 in | 9 days | — | None |
Annual total: 33.7 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.
Clearwater County Soil Profile
Soil Type
Silt Loam
Soil pH
6.2-7.2
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 28 | Oct 13 | 138 days |
| Cautious | May 20 | Oct 4 | 137 days |
| Average year | May 15 | Sep 28 | 136 days |
| Optimistic | May 8 | Sep 21 | 136 days |
| Aggressive (risky) | Apr 27 | Sep 11 | 137 days |
Not very — frost dates can vary by ±30 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 2.9 days per decade). Spring is arriving earlier than it used to. Good news for gardeners.
Gardening Difficulty Score
Clearwater County presents some gardening challenges. Choose adapted varieties and plan around frost dates.
Local Gardening Help in Clearwater 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 Clearwater County's climate and soil.
County Extension Office
Clearwater County University of Minnesota Extension Extension Office
Phone: 612-625-8173
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 Clearwater County
Finding local nurseries & garden centers in Clearwater County
Why Buy Local
Local nurseries carry plants that are proven to grow in your area. Staff can give you advice specific to Clearwater 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 Clearwater County MN" or "garden center Clearwater 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 Clearwater County MN" or check your extension office and local parks department. Facebook groups like "Clearwater County Gardeners" or "Minnesota 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
Monthly daylight hours and peak sun — critical for onion varieties, photoperiod-sensitive plants, and solar garden planning.
Longest Day
15.8 hours
Summer solstice daylight
Shortest Day
8.2 hours
Winter solstice daylight
Peak Sun Hours
10.1 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 | 8.6 hr | 3.6 hr | Short day |
| February | 10 hr | 4.6 hr | Short day |
| March | 11.6 hr | 5.4 hr | Short day |
| April | 13.4 hr | 7 hr | Neutral |
| May | 14.9 hr | 8.4 hr | Long day |
| June | 15.8 hr | 10.1 hr | Long day |
| July | 15.4 hr | 9.5 hr | Long day |
| August | 14.1 hr | 8.7 hr | Long day |
| September | 12.3 hr | 7.4 hr | Neutral |
| October | 10.6 hr | 5.4 hr | Short day |
| November | 9 hr | 3.5 hr | Short day |
| December | 8.2 hr | 3.1 hr | Short day |
Peak sun hours factor in typical cloud cover — use these for solar panel and shade-planning calculations.
Soil Temperature & Composting Calendar
Monthly soil temps tell you when to plant warm-season crops, and when your compost pile is actively working.
Plant Warm Crops When
Soil reaches 60°F+
Soil warm enough from Jun through Sep.
Best Month to Compost
Jul
Microbial activity peaks when soil is warm.
Active Composting
5 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 | 9°F | 18°F | ❄️ Dormant | ~36 weeks |
| Feb | 7°F | 15°F | ❄️ Dormant | ~36 weeks |
| Mar | 18°F | 23°F | ❄️ Dormant | ~36 weeks |
| Apr | 34°F | 34°F | ❄️ Dormant | ~36 weeks |
| May | 51°F | 45°F | ♻️ Active | ~14 weeks |
| Jun | 60°F | 55°F | ♻️ Active | ~14 weeks |
| Jul | 68°F | 62°F | 🔥 Peak | ~8 weeks |
| Aug | 70°F | 64°F | 🔥 Peak | ~8 weeks |
| Sep | 62°F | 59°F | ♻️ Active | ~14 weeks |
| Oct | 46°F | 51°F | 🐢 Slow | ~24 weeks |
| Nov | 33°F | 37°F | ❄️ Dormant | ~36 weeks |
| Dec | 18°F | 27°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 Clearwater County
Computed from local climate patterns — warmer, humid conditions increase pest generations and fungal disease risk.
Insect Pest Pressure
Moderate — common pests appear but manageable with monitoring.
Disease Risk
Low disease risk — dry conditions reduce fungal problems.
Seasonal Risk
View 3 common pests in your area
| Pest | Risk Level | Peak Months |
|---|---|---|
| Aphids | Low | Jun, Jul, Aug |
| Cabbage worms | Moderate | Jun, Jul, Aug |
| Slugs | Moderate | May, Jun, Jul, Aug |
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 Clearwater County
Cover crops protect bare soil, fix nitrogen, suppress weeds, and improve soil structure — with county-specific planting dates.
Spring Cover Crops (2 options) — Build soil before the main growing season
| Crop | Plant By | Terminate | N-Fixing | Soil Benefit |
|---|---|---|---|---|
| Buckwheat | May 17 | Jul 20 | — | Rapid growth, attracts pollinators, suppresses weeds |
| White clover | Apr 20 | Jul 27 | ✓ 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 3 | Sep 7 | — | Deep roots break compaction, attract pollinators and beneficial insects |
Fall Cover Crops (3 options) — Plant after harvest to protect soil over winter
| Crop | Plant By | Terminate | N-Fixing | Soil Benefit |
|---|---|---|---|---|
| Oats | Aug 29 | May 1 | — | Quick biomass, winterkills in cold zones — no spring tillage needed |
| Winter rye | Jun 30 | Apr 24 | — | Suppresses weeds, prevents erosion, breaks up compacted soil |
| Winter wheat | Jun 21 | Apr 24 | — | Erosion control, weed suppression, good biomass |
Wind & Microclimate
Wind dries soil, stresses plants, and affects frost patterns. Understanding your exposure helps with garden placement.
Seasonal Wind Speed
Spring: 13 mph Summer: 10 mph
Fall: 9 mph Winter: 12 mph
Prevailing wind: SW. Moderate wind — consider a temporary windbreak for young seedlings.
Windbreak Benefit
6.7/10
Moderately beneficial — a simple fence or trellis can protect delicate crops from wind stress.
Frost Pocket Risk
Low
Relatively flat terrain (249 ft range). Frost pocket risk is minimal — garden placement is flexible.
Rainwater Harvesting Potential
How much water you can collect, when to collect it, and what size system you need for your garden.
Annual Collection
16,796 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 33.7 inches of rain per year
- A 1,000 sq ft roof can collect roughly 16,796 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
Soil & Growing Conditions in Clearwater County
Soil Type
Silt Loam
Soil pH 6.2–7.2 · Excessively Drained drainage
Native soil is well-suited to most vegetables and herbs with regular compost additions.
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
136-day frost-free season
Start warm-season crops indoors and focus on short-season varieties. Cold frames extend your season by 3–4 weeks in fall.
Your Free Printable Garden Planner
Plan every bed, every planting, every harvest — in one place. This 24-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 Clearwater County
87 vegetables that grow well in Zone 3b with planting dates for Clearwater County.
Show all 87 vegetables with planting dates
| Plant | Start Indoors | Direct Sow | Transplant | Harvest | Days to Maturity |
|---|---|---|---|---|---|
| Acorn Squash | Apr 3 | May 29 | Jun 5 | Aug 28 – Oct 2 | 80–100 |
| Amaranth | Mar 13 | May 29 | Jun 5 | Sep 4 – Oct 9 | 90–120 |
| Arugula | Apr 3 | May 8 | May 15 | Jun 19 – Aug 21 | 30–50 |
| Asparagus | — | — | May 29 | — | 730–1095 |
| Beets | — | May 8 | — | Jul 3 – Jul 31 | 50–70 |
| Belgian Endive | Apr 3 | May 8 | May 15 | Sep 4 – Sep 18 | 110–150 |
| Black Beans | — | May 29 | — | Aug 28 – Oct 2 | 90–120 |
| Bok Choy | Apr 3 | May 8 | May 15 | Jun 26 – Jul 31 | 40–60 |
| Broccoli | Apr 3 | May 8 | May 15 | Jul 17 – Aug 28 | 60–90 |
| Broccoli Rabe | Apr 3 | May 8 | May 15 | Jun 26 – Jul 31 | 40–60 |
| Brussels Sprouts | Apr 3 | May 8 | May 15 | Aug 14 – Sep 18 | 90–130 |
| Butternut Squash | Apr 3 | May 29 | Jun 5 | Sep 4 – Oct 9 | 85–110 |
| Cabbage | Apr 3 | May 8 | May 15 | Jul 17 – Sep 11 | 60–100 |
| Carrots | — | May 8 | — | Jul 10 – Aug 14 | 60–80 |
| Cauliflower | Apr 3 | May 8 | May 15 | Jul 10 – Sep 11 | 55–100 |
| Celeriac | Apr 3 | May 8 | May 15 | Aug 28 – Sep 18 | 100–120 |
| Celery | Apr 3 | May 8 | May 15 | Aug 7 – Sep 18 | 80–120 |
| Celtuce | Apr 3 | May 8 | May 15 | Jul 17 – Aug 28 | 60–90 |
| Chard | Apr 3 | May 8 | May 15 | Jul 10 – Aug 28 | 50–60 |
| Chickpeas | Apr 3 | May 8 | May 15 | Aug 7 – Sep 18 | 80–110 |
| Chicory | Apr 3 | May 8 | May 15 | Jul 17 – Aug 28 | 60–85 |
| Chinese Cabbage | Apr 3 | May 8 | May 15 | Jul 10 – Aug 7 | 50–70 |
| Collard Greens | Apr 3 | May 8 | May 15 | Jul 10 – Sep 11 | 55–75 |
| Corn | — | May 29 | — | Jul 31 – Sep 25 | 60–100 |
| Cress | Apr 3 | May 8 | May 15 | May 29 – Jun 19 | 14–21 |
| Crookneck Squash | Apr 3 | May 29 | Jun 5 | Jul 24 – Aug 21 | 45–60 |
| Cucumber | Apr 3 | May 29 | Jun 5 | Jul 31 – Sep 25 | 50–70 |
| Daikon | — | May 8 | — | Jul 3 – Jul 31 | 50–70 |
| Delicata Squash | Apr 3 | May 29 | Jun 5 | Aug 28 – Oct 2 | 80–100 |
| Edamame | — | May 29 | — | Aug 14 – Sep 25 | 75–100 |
| Endive | Apr 3 | May 8 | May 15 | Jul 3 – Aug 7 | 45–65 |
| Escarole | Apr 3 | May 8 | May 15 | Jul 10 – Aug 7 | 50–70 |
| Fava Beans | Apr 3 | May 8 | May 15 | Jul 31 – Sep 11 | 75–100 |
| Garlic | — | — | — | — | 90–240 |
| Green Beans | — | May 29 | — | Jul 24 – Sep 18 | 50–65 |
| Horseradish | — | — | May 29 | Oct 2 | 120–180 |
| Hubbard Squash | Apr 3 | May 29 | Jun 5 | Sep 18 – Oct 9 | 100–120 |
| Kabocha | Apr 3 | May 29 | Jun 5 | Sep 4 – Oct 2 | 85–100 |
| Kai Lan | Apr 3 | May 8 | May 15 | Jul 3 – Jul 31 | 45–60 |
| Kale | Apr 3 | May 8 | May 15 | Jul 10 – Sep 4 | 50–70 |
| Kidney Beans | — | May 29 | — | Aug 28 – Oct 2 | 85–110 |
| Kohlrabi | Apr 3 | May 8 | May 15 | Jul 3 – Aug 7 | 45–65 |
| Komatsuna | Apr 3 | May 8 | May 15 | Jun 19 – Jul 24 | 35–50 |
| Leeks | Apr 3 | May 8 | May 15 | Aug 14 – Sep 18 | 90–150 |
| Lentils | Apr 3 | May 8 | May 15 | Aug 7 – Sep 18 | 80–110 |
| Lettuce | Apr 3 | May 8 | May 15 | Jun 19 – Aug 28 | 30–60 |
| Lima Beans | — | May 29 | — | Jul 31 – Sep 11 | 60–90 |
| Mache | Apr 3 | May 8 | May 15 | Jun 26 – Jul 31 | 40–60 |
| Microgreens | Apr 3 | May 8 | May 15 | May 22 – Jun 19 | 7–21 |
| Mizuna | Apr 3 | May 8 | May 15 | Jun 19 – Jul 17 | 30–45 |
| Mustard Greens | Apr 3 | May 8 | May 15 | Jun 19 – Aug 21 | 30–50 |
| Napa Cabbage | Apr 3 | May 8 | May 15 | Jul 10 – Aug 14 | 55–75 |
| Onion | Apr 3 | May 8 | May 15 | Aug 14 – Sep 18 | 90–120 |
| Pac Choi | Apr 3 | May 8 | May 15 | Jun 26 – Jul 24 | 40–55 |
| Parsnip | — | May 8 | — | Aug 21 – Sep 11 | 100–130 |
| Patty Pan Squash | Apr 3 | May 29 | Jun 5 | Jul 24 – Aug 21 | 45–60 |
| Peas | Apr 3 | May 8 | May 15 | Jul 10 – Sep 4 | 55–70 |
| Peppers | Feb 27 | May 29 | Jun 5 | Aug 7 – Oct 9 | 60–90 |
| Pole Beans | Mar 13 | May 29 | Jun 5 | Jul 31 – Sep 25 | 55–70 |
| Potatoes | Mar 13 | May 29 | Jun 5 | Aug 14 – Oct 9 | 70–120 |
| Pumpkin | Apr 3 | May 29 | Jun 5 | Sep 4 – Oct 9 | 85–120 |
| Purslane | Apr 3 | May 8 | May 15 | Jun 26 – Jul 31 | 40–60 |
| Radish | — | May 8 | — | Jun 5 – Jun 26 | 22–35 |
| Rhubarb | — | — | Jun 12 | — | 365–730 |
| Romanesco | Apr 3 | May 8 | May 15 | Jul 31 – Sep 11 | 75–100 |
| Rutabaga | — | May 8 | — | Jul 31 – Sep 4 | 80–100 |
| Salsify | — | May 8 | — | Aug 21 – Sep 11 | 100–130 |
| Savoy Cabbage | Apr 3 | May 8 | May 15 | Jul 24 – Sep 18 | 70–110 |
| Scallions | Apr 3 | May 8 | May 15 | Jul 10 – Aug 7 | 50–70 |
| Scarlet Runner Beans | Mar 13 | May 29 | Jun 5 | Aug 7 – Sep 11 | 60–80 |
| Shiso | Mar 20 | May 22 | Jun 5 | Jul 31 – Sep 25 | 50–70 |
| Snap Peas | Mar 13 | May 29 | Jun 5 | Jul 31 – Sep 25 | 55–70 |
| Snow Peas | Apr 3 | May 8 | May 15 | Jul 10 – Sep 4 | 50–65 |
| Soybeans | — | May 29 | — | Aug 21 – Oct 2 | 80–120 |
| Spaghetti Squash | Apr 3 | May 29 | Jun 5 | Sep 4 – Oct 2 | 85–100 |
| Spinach | Apr 3 | May 8 | May 15 | Jun 19 – Aug 21 | 35–50 |
| Squash (Summer) | Apr 3 | May 29 | Jun 5 | Jul 24 – Sep 25 | 45–65 |
| Squash (Winter) | Apr 3 | May 29 | Jun 5 | Aug 28 – Oct 9 | 80–120 |
| Sunchoke | — | — | May 29 | Sep 18 – Oct 2 | 110–150 |
| Sunflower | Mar 13 | May 29 | Jun 5 | Aug 14 – Oct 2 | 70–100 |
| Sweet Corn | — | May 29 | — | Jul 31 – Sep 11 | 60–90 |
| Tatsoi | Apr 3 | May 8 | May 15 | Jun 19 – Jul 24 | 35–50 |
| Tomatoes | Mar 13 | May 29 | Jun 5 | Aug 7 – Oct 9 | 60–85 |
| Turnip | — | May 8 | — | Jun 19 – Jul 24 | 40–60 |
| Watercress | Apr 3 | May 8 | May 15 | Jun 26 – Jul 31 | 40–60 |
| Wax Beans | — | May 29 | — | Jul 24 – Sep 18 | 50–65 |
| Zucchini | Apr 3 | May 29 | Jun 5 | Jul 24 – Sep 18 | 45–60 |
🍓 Fruits to Grow in Clearwater County
15 fruits that grow well in Zone 3b with planting dates for Clearwater County.
Show all 15 fruits with planting dates
| Plant | Start Indoors | Direct Sow | Transplant | Harvest | Days to Maturity |
|---|---|---|---|---|---|
| Alpine Strawberries | — | — | Jun 12 | Sep 11 – Oct 16 | 90–180 |
| Aronia | — | — | Jun 12 | — | 730–1095 |
| Blueberries | — | — | Jun 12 | — | 730–1095 |
| Cranberries | — | — | Jun 12 | — | 730–1095 |
| Currants | — | — | Jun 12 | — | 730–1095 |
| Elderberries | — | — | Jun 12 | — | 730–1095 |
| Goji Berries | — | — | Jun 12 | — | 730–1095 |
| Gooseberries | — | — | Jun 12 | — | 730–1095 |
| Hardy Kiwi | — | — | Jun 12 | — | 1095–1825 |
| Haskaps | — | — | Jun 12 | — | 730–1095 |
| Jostaberry | — | — | Jun 12 | — | 730–1095 |
| Lingonberries | — | — | Jun 12 | — | 730–1095 |
| Raspberries | — | — | Jun 12 | — | 365–730 |
| Serviceberries | — | — | Jun 12 | — | 730–1095 |
| Strawberries | — | — | Jun 12 | Sep 11 – Oct 16 | 90–365 |
🌿 Herbs to Grow in Clearwater County
22 herbs that grow well in Zone 3b with planting dates for Clearwater County.
Show all 22 herbs with planting dates
| Plant | Start Indoors | Direct Sow | Transplant | Harvest | Days to Maturity |
|---|---|---|---|---|---|
| Angelica | Apr 3 | May 8 | May 8 | — | 365–730 |
| Bee Balm | — | — | May 22 | Aug 21 – Sep 25 | 90–120 |
| Borage | Apr 3 | May 8 | May 8 | Jul 3 – Aug 21 | 50–60 |
| Caraway | Apr 3 | May 8 | May 8 | — | 365–450 |
| Catnip | — | — | May 22 | Jul 24 – Sep 25 | 60–80 |
| Chamomile | Apr 3 | May 8 | May 8 | Jul 10 – Sep 11 | 60–90 |
| Chervil | Apr 3 | May 8 | May 8 | Jun 19 – Aug 21 | 40–60 |
| Chives | — | — | May 22 | Jul 24 – Sep 25 | 60–90 |
| Cilantro | Apr 3 | May 8 | May 8 | Jun 19 – Aug 21 | 40–60 |
| Comfrey | — | — | May 22 | Jul 24 – Sep 25 | 60–90 |
| Dill | Apr 3 | May 8 | May 8 | Jun 19 – Aug 21 | 40–60 |
| Echinacea | — | — | May 22 | Sep 25 | 120–180 |
| Garlic Chives | — | — | May 22 | Jul 24 – Sep 25 | 60–90 |
| Horehound | — | — | May 22 | Aug 7 – Sep 25 | 75–90 |
| Hyssop | — | — | May 22 | Jul 31 – Sep 25 | 70–90 |
| Lemon Balm | — | — | May 22 | Jul 24 – Sep 11 | 60–70 |
| Lovage | — | — | May 22 | Jul 31 – Sep 25 | 70–90 |
| Mint | — | — | May 22 | Jul 24 – Sep 25 | 60–90 |
| Parsley | Apr 3 | May 8 | May 8 | Jul 10 – Sep 11 | 60–80 |
| Sorrel | Apr 3 | May 8 | May 8 | Jun 19 – Aug 21 | 40–60 |
| Valerian | — | — | May 22 | Sep 25 | 120–180 |
| Yarrow | — | — | May 22 | Aug 21 – Sep 25 | 90–120 |
Monthly Planting Guide for Clearwater County
Gardening Guides & Resources
Helpful guides from The Ultimate Homestead to improve your garden in Clearwater County.
Frequently Asked Questions
What planting zone is Clearwater County, MN?
Clearwater County is in USDA Hardiness Zone 3b. 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 Clearwater County, MN?
Based on 31 years of NOAA weather station data, the median last spring frost in Clearwater County falls around May 15. In 8 out of 10 years, last frost lands between April 27 and May 28 — a 30-day window of variability. Use May 28 as your conservative safe-to-plant date for frost-sensitive crops.
When is the first fall frost in Clearwater County, MN?
The median first fall frost in Clearwater County arrives around September 28. In cold years it can arrive as early as September 11; in mild years as late as October 13. Harvest or protect frost-sensitive crops — tomatoes, peppers, basil, squash — before this date.
How long is the growing season in Clearwater County?
Clearwater County has a frost-free growing season of approximately 136 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 2.86 days per decade.
What is the soil like in Clearwater County for gardening?
Clearwater County has predominantly Silt Loam soil with a pH range of 6.2–7.2 and Excessively Drained drainage. Most vegetables and herbs grow well with standard composting and seasonal soil amendment.
What is grown commercially in Clearwater County?
Clearwater County has commercial agriculture that includes Corn, Soybeans, Hay, Dairy, Oats. These crops reflect the local climate and soil conditions — what succeeds commercially often translates well to home gardens in the same area.
Is Clearwater County a good location for home gardening?
Clearwater County scores 57/100 (Moderate) on our Microclimate Index, which combines frost reliability, drought pressure, soil challenge, elevation risk, and long-term climate trend. Conditions here are moderate — most common crops grow well with standard timing and care.
Your Clearwater County Garden Planner — Free
A 24-page printable planner built for Clearwater County (Zone 3b). 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