Missoula County, MT — Planting Guide
Missoula County, Montana gardeners: here's your May plan
Your Missoula County, Montana garden is entering a new phase. Here's what's on the schedule for May and why each task matters now.
-
Plant out basil, cucumber, and kale
Plant tomatoes deep — bury the stem up to the first true leaves to grow extra roots. Everything else goes in at the same depth it grew in the tray.
-
Put basil, cucumber, and green beans seeds straight in the ground
Thin ruthlessly once seedlings are up. Crowded roots mean smaller crops from every plant.
-
Harvest radish, cress, and microgreens as they ripen
Morning harvests are best — cooler temperatures mean crisper produce and longer fridge life.
A few tasks this May that'll pay off in June
- Transplants going out: alpine strawberries, aronia, and blackberries
- Starting indoors: cucumber, kale, and lettuce
- First harvests: lettuce, radish, and arugula
Missoula County is in USDA Zone 5b. The average last spring frost is May 14 and the first fall frost is September 23, giving you a growing season of approximately 132 days.
At an elevation of 8,019 ft, Missoula County receives approximately 15.9 in of rainfall annually. Summer highs average 87°F with winter lows around 15°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 April 28 in warm years to June 4 in cold years. The growing season is trending longer by about 4.69 days per decade. Missoula County scores 26/100 (Challenging) on the Microclimate Index.
🌡️ Zone
5b (°F to °F min)
❄️ Last Frost
May 14
🍂 First Frost
September 23
📅 Growing Season
132 days
⛰️ Elevation
8,019 ft
🌧️ Annual Rainfall
15.9 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 in | 6 days | — | None |
| Feb | 1 in | 6 days | — | None |
| Mar | 1.6 in | 7 days | — | None |
| Apr | 1.7 in | 7 days | 2.6 in | High |
| May | 1.7 in | 8 days | 2.6 in | High |
| Jun | 1.1 in | 4 days | 3.2 in | Critical |
| Jul | 1.3 in | 5 days | 3 in | High |
| Aug | 1.9 in | 5 days | 2.4 in | High |
| Sep | 1.4 in | 5 days | 2.9 in | High |
| Oct | 1.5 in | 6 days | 2.8 in | High |
| Nov | 1 in | 5 days | — | None |
| Dec | 1 in | 7 days | — | None |
Annual total: 16.2 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.
Missoula County Soil Profile
Soil Type
Loam
Soil pH
6.2-7.7
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 4 | Oct 13 | 131 days |
| Cautious | May 20 | Oct 4 | 137 days |
| Average year | May 14 | Sep 23 | 132 days |
| Optimistic | May 8 | Sep 19 | 134 days |
| Aggressive (risky) | Apr 28 | Sep 10 | 135 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 4.7 days per decade). Spring is arriving earlier than it used to. Good news for gardeners.
Gardening Difficulty Score
Missoula County has challenging growing conditions. Season extension and careful variety selection are essential.
Local Gardening Help in Missoula 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 Missoula County's climate and soil.
County Extension Office
Missoula County Montana State University Extension Extension Office
Phone: 406-994-3402
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 Missoula County
Finding local nurseries & garden centers in Missoula County
Why Buy Local
Local nurseries carry plants that are proven to grow in your area. Staff can give you advice specific to Missoula 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 Missoula County MT" or "garden center Missoula 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 Missoula County MT" or check your extension office and local parks department. Facebook groups like "Missoula County Gardeners" or "Montana 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
15.7 hours
Summer solstice daylight
Shortest Day
8.3 hours
Winter solstice daylight
Peak Sun Hours
10.9 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 | 8.7 hr | 4.6 hr | Short day |
| February | 10 hr | 5.6 hr | Short day |
| March | 11.6 hr | 7 hr | Short day |
| April | 13.4 hr | 7.8 hr | Neutral |
| May | 14.9 hr | 9.6 hr | Long day |
| June | 15.7 hr | 10.9 hr | Long day |
| July | 15.3 hr | 10.7 hr | Long day |
| August | 14 hr | 9.1 hr | Long day |
| September | 12.3 hr | 8.4 hr | Neutral |
| October | 10.6 hr | 7.2 hr | Short day |
| November | 9.1 hr | 5.2 hr | Short day |
| December | 8.3 hr | 4.3 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 rarely reaches 60°F — use black plastic mulch to warm soil.
Best Month to Compost
Jul
Microbial activity peaks when soil is warm.
Active Composting
2 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 | -4°F | 5°F | ❄️ Dormant | ~36 weeks |
| Feb | -1°F | 5°F | ❄️ Dormant | ~36 weeks |
| Mar | 8°F | 8°F | ❄️ Dormant | ~36 weeks |
| Apr | 20°F | 18°F | ❄️ Dormant | ~36 weeks |
| May | 32°F | 31°F | ❄️ Dormant | ~36 weeks |
| Jun | 43°F | 37°F | 🐢 Slow | ~24 weeks |
| Jul | 50°F | 44°F | ♻️ Active | ~14 weeks |
| Aug | 54°F | 46°F | ♻️ Active | ~14 weeks |
| Sep | 46°F | 43°F | 🐢 Slow | ~24 weeks |
| Oct | 33°F | 36°F | ❄️ Dormant | ~36 weeks |
| Nov | 17°F | 22°F | ❄️ Dormant | ~36 weeks |
| Dec | 5°F | 14°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 Missoula 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 5 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 | Low | Jul, Aug |
| Cabbage loopers | 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 Missoula County
Cover crops protect bare soil, fix nitrogen, suppress weeds, and improve soil structure — with county-specific planting dates.
Spring Cover Crops (3 options) — Build soil before the main growing season
| Crop | Plant By | Terminate | N-Fixing | Soil Benefit |
|---|---|---|---|---|
| Buckwheat | May 21 | Jul 15 | — | Rapid growth, attracts pollinators, suppresses weeds |
| Sorghum-sudan grass | May 19 | Jul 15 | — | Massive biomass, breaks compaction, suppresses nematodes |
| White clover | Apr 14 | Jul 15 | ✓ 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 | May 31 | Sep 9 | — | 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 | Jul 15 | Apr 23 | ✓ Yes | Fixes nitrogen, good for heavy clay soils |
| Daikon radish | Aug 9 | Apr 30 | — | Deep taproot breaks compaction, excellent for clay soils |
| Hairy vetch | Jul 2 | Apr 23 | ✓ Yes | Excellent nitrogen fixer, good for depleted soils |
| Oats | Aug 11 | Apr 30 | — | Quick biomass, winterkills in cold zones — no spring tillage needed |
| Winter rye | Jun 14 | Apr 30 | — | Suppresses weeds, prevents erosion, breaks up compacted soil |
| Winter wheat | Jul 2 | Apr 30 | — | 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: 14 mph Summer: 10 mph
Fall: 12 mph Winter: 15 mph
Prevailing wind: W. Windy area — plant a windbreak hedge on the W side of your garden.
Windbreak Benefit
7.4/10
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 1,062 ft of elevation range — cold air pools in low spots. Avoid planting frost-sensitive crops in valleys.
Rainwater Harvesting Potential
How much water you can collect, when to collect it, and what size system you need for your garden.
Annual Collection
8,074 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
Unrestricted
Rainwater harvesting is fully legal in your state with no restrictions.
Best Collection Months
Mar, Apr, May, Aug
Highest rainfall months — your barrels will fill up quickly during these months.
Months to Draw From Storage
Feb, 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 16.2 inches of rain per year
- A 1,000 sq ft roof can collect roughly 8,074 gallons annually
- Rainwater harvesting is fully legal in your state
- 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 Missoula County
Soil Type
Loam
Soil pH 6.2–7.7 · Well Drained drainage
Native soil is well-suited to most vegetables and herbs with regular compost additions.
Watering Needs
Drought stress: 7.5/10
High drought stress. Consistent irrigation is essential — consider drip systems, heavy mulch, and drought-tolerant varieties.
Season Tips
132-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 Missoula County
106 vegetables that grow well in Zone 5b with planting dates for Missoula County.
Show all 106 vegetables with planting dates
| Plant | Start Indoors | Direct Sow | Transplant | Harvest | Days to Maturity |
|---|---|---|---|---|---|
| Acorn Squash | Apr 9 | May 21 | May 28 | Aug 20 – Sep 24 | 80–100 |
| Amaranth | Mar 19 | May 21 | May 28 | Aug 27 – Oct 15 | 90–120 |
| Arugula | Apr 9 | Apr 30 | May 14 | Jun 18 – Aug 20 | 30–50 |
| Asparagus | — | — | May 28 | — | 730–1095 |
| Beets | — | Apr 30 | — | Jun 25 – Jul 23 | 50–70 |
| Belgian Endive | Apr 9 | Apr 30 | May 14 | Sep 3 – Oct 29 | 110–150 |
| Bitter Melon | Mar 19 | May 21 | May 28 | Jul 30 – Sep 10 | 60–90 |
| Black Beans | — | May 21 | — | Aug 20 – Oct 8 | 90–120 |
| Bok Choy | Apr 9 | Apr 30 | May 14 | Jun 25 – Jul 30 | 40–60 |
| Broccoli | Apr 9 | Apr 30 | May 14 | Jul 16 – Aug 27 | 60–90 |
| Broccoli Rabe | Apr 9 | Apr 30 | May 14 | Jun 25 – Jul 30 | 40–60 |
| Brussels Sprouts | Apr 9 | Apr 30 | May 14 | Aug 13 – Oct 8 | 90–130 |
| Butternut Squash | Apr 9 | May 21 | May 28 | Aug 27 – Oct 1 | 85–110 |
| Cabbage | Apr 9 | Apr 30 | May 14 | Jul 16 – Sep 10 | 60–100 |
| Calabash | Mar 19 | May 21 | May 28 | Aug 20 – Oct 15 | 80–120 |
| Carrots | — | Apr 30 | — | Jul 2 – Aug 6 | 60–80 |
| Cauliflower | Apr 9 | Apr 30 | May 14 | Jul 9 – Sep 10 | 55–100 |
| Celeriac | Apr 9 | Apr 30 | May 14 | Aug 27 – Oct 1 | 100–120 |
| Celery | Apr 9 | Apr 30 | May 14 | Aug 6 – Oct 1 | 80–120 |
| Celtuce | Apr 9 | Apr 30 | May 14 | Jul 16 – Aug 27 | 60–90 |
| Chard | Apr 9 | Apr 30 | May 14 | Jul 9 – Aug 27 | 50–60 |
| Chickpeas | Apr 9 | Apr 30 | May 14 | Aug 6 – Sep 17 | 80–110 |
| Chicory | Apr 9 | Apr 30 | May 14 | Jul 16 – Aug 27 | 60–85 |
| Chinese Cabbage | Apr 9 | Apr 30 | May 14 | Jul 9 – Aug 6 | 50–70 |
| Christmas Lima Beans | Mar 19 | May 21 | May 28 | Aug 20 – Sep 24 | 80–100 |
| Collard Greens | Apr 9 | Apr 30 | May 14 | Jul 9 – Sep 10 | 55–75 |
| Corn | — | May 21 | — | Jul 23 – Sep 17 | 60–100 |
| Cowpeas | — | May 21 | — | Jul 23 – Sep 3 | 60–90 |
| Cress | Apr 9 | Apr 30 | May 14 | May 28 – Jun 18 | 14–21 |
| Crookneck Squash | Apr 9 | May 21 | May 28 | Jul 16 – Aug 13 | 45–60 |
| Crosne | — | Apr 30 | — | Oct 1 – Oct 15 | 150–200 |
| Cucumber | Apr 9 | May 21 | May 28 | Jul 23 – Sep 17 | 50–70 |
| Daikon | — | Apr 30 | — | Jun 25 – Jul 23 | 50–70 |
| Delicata Squash | Apr 9 | May 21 | May 28 | Aug 20 – Sep 24 | 80–100 |
| Edamame | — | May 21 | — | Aug 6 – Sep 17 | 75–100 |
| Eggplant | Mar 5 | May 21 | May 28 | Aug 6 – Oct 8 | 65–85 |
| Endive | Apr 9 | Apr 30 | May 14 | Jul 2 – Aug 6 | 45–65 |
| Escarole | Apr 9 | Apr 30 | May 14 | Jul 9 – Aug 6 | 50–70 |
| Fava Beans | Apr 9 | Apr 30 | May 14 | Jul 30 – Sep 10 | 75–100 |
| Fennel | Mar 19 | May 21 | May 28 | Jul 30 – Sep 10 | 60–90 |
| Garlic | — | — | — | — | 90–240 |
| Green Beans | — | May 21 | — | Jul 16 – Sep 10 | 50–65 |
| Horseradish | — | — | May 28 | Oct 1 – Nov 12 | 120–180 |
| Hot Peppers | Mar 5 | May 21 | May 28 | Aug 6 – Nov 12 | 70–120 |
| Hubbard Squash | Apr 9 | May 21 | May 28 | Sep 10 – Oct 15 | 100–120 |
| Kabocha | Apr 9 | May 21 | May 28 | Aug 27 – Sep 24 | 85–100 |
| Kai Lan | Apr 9 | Apr 30 | May 14 | Jul 2 – Jul 30 | 45–60 |
| Kale | Apr 9 | Apr 30 | May 14 | Jul 9 – Sep 3 | 50–70 |
| Kidney Beans | — | May 21 | — | Aug 20 – Sep 24 | 85–110 |
| Kohlrabi | Apr 9 | Apr 30 | May 14 | Jul 2 – Aug 6 | 45–65 |
| Komatsuna | Apr 9 | Apr 30 | May 14 | Jun 18 – Jul 23 | 35–50 |
| Leeks | Apr 9 | Apr 30 | May 14 | Aug 13 – Oct 29 | 90–150 |
| Lentils | Apr 9 | Apr 30 | May 14 | Aug 6 – Sep 17 | 80–110 |
| Lettuce | Apr 9 | Apr 30 | May 14 | Jun 18 – Aug 27 | 30–60 |
| Lima Beans | — | May 21 | — | Jul 23 – Sep 3 | 60–90 |
| Mache | Apr 9 | Apr 30 | May 14 | Jun 25 – Jul 30 | 40–60 |
| Melon | Apr 9 | May 21 | May 28 | Aug 6 – Sep 24 | 70–100 |
| Microgreens | Apr 9 | Apr 30 | May 14 | May 21 – Jun 18 | 7–21 |
| Mitsuba | Apr 9 | Apr 30 | May 7 | Jul 2 – Aug 27 | 50–70 |
| Mizuna | Apr 9 | Apr 30 | May 14 | Jun 18 – Jul 16 | 30–45 |
| Mustard Greens | Apr 9 | Apr 30 | May 14 | Jun 18 – Aug 20 | 30–50 |
| Napa Cabbage | Apr 9 | Apr 30 | May 14 | Jul 9 – Aug 13 | 55–75 |
| New Zealand Spinach | Mar 19 | May 21 | May 28 | Jul 23 – Aug 20 | 55–70 |
| Okra | Mar 19 | May 21 | May 28 | Jul 23 – Sep 17 | 50–65 |
| Onion | Apr 9 | Apr 30 | May 14 | Aug 13 – Oct 1 | 90–120 |
| Pac Choi | Apr 9 | Apr 30 | May 14 | Jun 25 – Jul 23 | 40–55 |
| Parsnip | — | Apr 30 | — | Aug 13 – Sep 24 | 100–130 |
| Patty Pan Squash | Apr 9 | May 21 | May 28 | Jul 16 – Aug 13 | 45–60 |
| Peas | Apr 9 | Apr 30 | May 14 | Jul 9 – Sep 3 | 55–70 |
| Peppers | Mar 5 | May 21 | May 28 | Jul 30 – Oct 8 | 60–90 |
| Pole Beans | Mar 19 | May 21 | May 28 | Jul 23 – Sep 17 | 55–70 |
| Potatoes | Mar 19 | May 21 | May 28 | Aug 6 – Oct 15 | 70–120 |
| Pumpkin | Apr 9 | May 21 | May 28 | Aug 27 – Oct 15 | 85–120 |
| Purslane | Apr 9 | Apr 30 | May 14 | Jun 25 – Jul 30 | 40–60 |
| Radicchio | Apr 9 | Apr 30 | May 14 | Jul 16 – Aug 20 | 60–80 |
| Radish | — | Apr 30 | — | May 28 – Jun 18 | 22–35 |
| Rhubarb | — | — | Jun 4 | — | 365–730 |
| Romanesco | Apr 9 | Apr 30 | May 14 | Jul 30 – Sep 10 | 75–100 |
| Rutabaga | — | Apr 30 | — | Jul 23 – Aug 27 | 80–100 |
| Salsify | — | Apr 30 | — | Aug 13 – Sep 24 | 100–130 |
| Savoy Cabbage | Apr 9 | Apr 30 | May 14 | Jul 23 – Sep 17 | 70–110 |
| Scallions | Apr 9 | Apr 30 | May 14 | Jul 9 – Aug 6 | 50–70 |
| Scarlet Runner Beans | Mar 19 | May 21 | May 28 | Jul 30 – Sep 3 | 60–80 |
| Shallot | Apr 9 | Apr 30 | May 14 | Aug 13 – Oct 1 | 90–120 |
| Shiso | Mar 26 | May 21 | May 28 | Jul 23 – Sep 17 | 50–70 |
| Snap Peas | Mar 19 | May 21 | May 28 | Jul 23 – Sep 17 | 55–70 |
| Snow Peas | Apr 9 | Apr 30 | May 14 | Jul 9 – Sep 3 | 50–65 |
| Soybeans | — | May 21 | — | Aug 13 – Oct 8 | 80–120 |
| Spaghetti Squash | Apr 9 | May 21 | May 28 | Aug 27 – Sep 24 | 85–100 |
| Spinach | Apr 9 | Apr 30 | May 14 | Jun 18 – Aug 20 | 35–50 |
| Squash (Summer) | Apr 9 | May 21 | May 28 | Jul 16 – Sep 17 | 45–65 |
| Squash (Winter) | Apr 9 | May 21 | May 28 | Aug 20 – Oct 15 | 80–120 |
| Sunchoke | — | — | May 28 | Sep 17 – Nov 12 | 110–150 |
| Sunflower | Mar 19 | May 21 | May 28 | Aug 6 – Sep 24 | 70–100 |
| Sweet Corn | — | May 21 | — | Jul 23 – Sep 3 | 60–90 |
| Sweet Potatoes | Mar 19 | May 21 | May 28 | Aug 27 – Oct 15 | 90–120 |
| Tatsoi | Apr 9 | Apr 30 | May 14 | Jun 18 – Jul 23 | 35–50 |
| Tomatillo | Mar 19 | May 21 | May 28 | Jul 30 – Oct 8 | 60–85 |
| Tomatoes | Mar 19 | May 21 | May 28 | Jul 30 – Oct 8 | 60–85 |
| Turnip | — | Apr 30 | — | Jun 11 – Jul 16 | 40–60 |
| Watercress | Apr 9 | Apr 30 | May 14 | Jun 25 – Jul 30 | 40–60 |
| Watermelon | Apr 9 | May 21 | May 28 | Aug 6 – Sep 24 | 70–100 |
| Wax Beans | — | May 21 | — | Jul 16 – Sep 10 | 50–65 |
| Winter Melon | Mar 19 | May 21 | May 28 | Aug 27 – Oct 15 | 90–120 |
| Yard Long Beans | Mar 19 | May 21 | May 28 | Jul 23 – Sep 3 | 55–80 |
| Zucchini | Apr 9 | May 21 | May 28 | Jul 16 – Sep 10 | 45–60 |
🍓 Fruits to Grow in Missoula County
27 fruits that grow well in Zone 5b with planting dates for Missoula County.
Show all 27 fruits with planting dates
| Plant | Start Indoors | Direct Sow | Transplant | Harvest | Days to Maturity |
|---|---|---|---|---|---|
| Alpine Strawberries | — | — | Jun 4 | Sep 3 – Nov 19 | 90–180 |
| Aronia | — | — | Jun 4 | — | 730–1095 |
| Blackberries | — | — | Jun 4 | — | 365–730 |
| Blueberries | — | — | Jun 4 | — | 730–1095 |
| Boysenberries | — | — | Jun 4 | — | 365–730 |
| Cantaloupe | — | — | Jun 4 | Aug 13 – Sep 17 | 70–90 |
| Che Fruit | — | — | Jun 4 | — | 1095–1825 |
| Cranberries | — | — | Jun 4 | — | 730–1095 |
| Currants | — | — | Jun 4 | — | 730–1095 |
| Elderberries | — | — | Jun 4 | — | 730–1095 |
| Goji Berries | — | — | Jun 4 | — | 730–1095 |
| Gooseberries | — | — | Jun 4 | — | 730–1095 |
| Grapes | — | — | Jun 4 | — | 730–1095 |
| Ground Cherry | — | — | Jun 4 | Aug 13 – Oct 8 | 65–80 |
| Hardy Kiwi | — | — | Jun 4 | — | 1095–1825 |
| Haskaps | — | — | Jun 4 | — | 730–1095 |
| Honeydew | — | — | Jun 4 | Aug 27 – Oct 8 | 80–110 |
| Jostaberry | — | — | Jun 4 | — | 730–1095 |
| Lingonberries | — | — | Jun 4 | — | 730–1095 |
| Medlar | — | — | Jun 4 | — | 1095–1825 |
| Mulberries | — | — | Jun 4 | — | 730–1825 |
| Pawpaw | — | — | Jun 4 | — | 1095–2555 |
| Persimmon | — | — | Jun 4 | — | 1095–2555 |
| Quince | — | — | Jun 4 | — | 1095–1825 |
| Raspberries | — | — | Jun 4 | — | 365–730 |
| Serviceberries | — | — | Jun 4 | — | 730–1095 |
| Strawberries | — | — | Jun 4 | Sep 3 – Nov 19 | 90–365 |
🌿 Herbs to Grow in Missoula County
37 herbs that grow well in Zone 5b with planting dates for Missoula County.
Show all 37 herbs with planting dates
| Plant | Start Indoors | Direct Sow | Transplant | Harvest | Days to Maturity |
|---|---|---|---|---|---|
| Angelica | Apr 9 | Apr 30 | May 7 | — | 365–730 |
| Anise | Apr 9 | Apr 30 | May 7 | Aug 6 – Oct 22 | 90–120 |
| Basil | Mar 26 | May 21 | May 28 | Jul 23 – Sep 24 | 50–75 |
| Bee Balm | — | — | May 21 | Aug 20 – Nov 5 | 90–120 |
| Borage | Apr 9 | Apr 30 | May 7 | Jul 2 – Aug 20 | 50–60 |
| Caraway | Apr 9 | Apr 30 | May 7 | — | 365–450 |
| Catnip | — | — | May 21 | Jul 23 – Sep 24 | 60–80 |
| Chamomile | Apr 9 | Apr 30 | May 7 | Jul 9 – Sep 17 | 60–90 |
| Chervil | Apr 9 | Apr 30 | May 7 | Jun 18 – Aug 20 | 40–60 |
| Chives | — | — | May 21 | Jul 23 – Oct 1 | 60–90 |
| Cilantro | Apr 9 | Apr 30 | May 7 | Jun 18 – Aug 20 | 40–60 |
| Comfrey | — | — | May 21 | Jul 23 – Oct 1 | 60–90 |
| Cumin | Apr 9 | Apr 30 | May 7 | Aug 20 – Oct 22 | 100–120 |
| Dill | Apr 9 | Apr 30 | May 7 | Jun 18 – Aug 20 | 40–60 |
| Echinacea | — | — | May 21 | Sep 24 – Nov 5 | 120–180 |
| Epazote | Mar 26 | May 21 | May 28 | Jul 16 – Sep 10 | 45–60 |
| Fennel (herb) | Apr 9 | Apr 30 | May 7 | Jul 9 – Sep 17 | 60–90 |
| Feverfew | — | — | May 21 | Aug 20 – Nov 5 | 90–120 |
| Garlic Chives | — | — | May 21 | Jul 23 – Oct 1 | 60–90 |
| Horehound | — | — | May 21 | Aug 6 – Oct 1 | 75–90 |
| Hyssop | — | — | May 21 | Jul 30 – Oct 1 | 70–90 |
| Lavender | — | — | May 21 | Aug 20 – Nov 5 | 90–200 |
| Lemon Balm | — | — | May 21 | Jul 23 – Sep 10 | 60–70 |
| Lemon Thyme | — | — | May 21 | Jul 30 – Oct 1 | 70–90 |
| Lovage | — | — | May 21 | Jul 30 – Oct 1 | 70–90 |
| Mint | — | — | May 21 | Jul 23 – Oct 1 | 60–90 |
| Oregano | — | — | May 21 | Jul 23 – Oct 1 | 60–90 |
| Parsley | Apr 9 | Apr 30 | May 7 | Jul 9 – Sep 10 | 60–80 |
| Rue | — | — | May 21 | Jul 30 – Oct 1 | 70–90 |
| Sage | — | — | May 21 | Aug 6 – Oct 1 | 75–90 |
| Savory | — | — | May 21 | Jul 16 – Sep 10 | 50–70 |
| Sorrel | Apr 9 | Apr 30 | May 7 | Jun 18 – Aug 20 | 40–60 |
| Tarragon | — | — | May 21 | Jul 23 – Oct 1 | 60–90 |
| Thai Basil | Mar 26 | May 21 | May 28 | Jul 23 – Sep 24 | 50–75 |
| Thyme | — | — | May 21 | Jul 30 – Oct 1 | 70–90 |
| Valerian | — | — | May 21 | Sep 24 – Nov 5 | 120–180 |
| Yarrow | — | — | May 21 | Aug 20 – Nov 5 | 90–120 |
Monthly Planting Guide for Missoula County
Gardening Guides & Resources
Helpful guides from The Ultimate Homestead to improve your garden in Missoula County.
Frequently Asked Questions
What planting zone is Missoula County, MT?
Missoula County is in USDA Hardiness Zone 5b. 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 Missoula County, MT?
Based on 31 years of NOAA weather station data, the median last spring frost in Missoula County falls around May 14. In 8 out of 10 years, last frost lands between April 28 and June 4 — a 37-day window of variability. Use June 4 as your conservative safe-to-plant date for frost-sensitive crops.
When is the first fall frost in Missoula County, MT?
The median first fall frost in Missoula County arrives around September 23. In cold years it can arrive as early as September 10; 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 Missoula County?
Missoula County has a frost-free growing season of approximately 132 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 4.69 days per decade.
What is the soil like in Missoula County for gardening?
Missoula County has predominantly Loam soil with a pH range of 6.2–7.7 and Well Drained drainage. Most vegetables and herbs grow well with standard composting and seasonal soil amendment.
What is grown commercially in Missoula County?
Missoula County has commercial agriculture that includes Cattle, Hay, Wheat. These crops reflect the local climate and soil conditions — what succeeds commercially often translates well to home gardens in the same area.
Is Missoula County a good location for home gardening?
Missoula County scores 26/100 (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 Missoula County Garden Planner — Free
A 24-page printable planner built for Missoula County (Zone 5b). 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