Ravalli County, MT — Planting Guide
This month in Ravalli County, Montana
If you only do a handful of things in the garden this May, make it these. They're sequenced around your zone's frost timing.
-
Transplant kale, lettuce, and angelica outside
Frost risk is low now in Ravalli County, Montana. If you've been covering beds overnight, you can stop.
-
Put basil, carrots, and cucumber seeds straight in the ground
Rake a smooth bed, make a shallow furrow, drop seeds at the spacing on the packet, water gently, walk away.
-
It's harvest week for microgreens
This is the payoff month. Bring a basket, bring a friend, and get into the beds.
A few tasks this May that'll pay off in June
- Transplants going out: basil, cucumber, and peppers
- Starting indoors: cucumber, kale, and lettuce
- First harvests: lettuce, radish, and arugula
Ravalli County is in USDA Zone 5b. The average last spring frost is May 21 and the first fall frost is September 20, giving you a growing season of approximately 122 days.
At an elevation of 7,813 ft, Ravalli County receives approximately 15.1 in of rainfall annually. Summer highs average 84°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 39 days year to year — ranging from May 1 in warm years to June 9 in cold years. The growing season is trending longer by about 5.97 days per decade. Ravalli County scores 26/100 (Challenging) on the Microclimate Index.
🌡️ Zone
5b (°F to °F min)
❄️ Last Frost
May 21
🍂 First Frost
September 20
📅 Growing Season
122 days
⛰️ Elevation
7,813 ft
🌧️ Annual Rainfall
15.1 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 | 1.1 in | 6 days | — | None |
| Feb | 1 in | 6 days | — | None |
| Mar | 1.4 in | 8 days | — | None |
| Apr | 1.5 in | 8 days | 2.8 in | High |
| May | 1.8 in | 8 days | 2.5 in | High |
| Jun | 0.9 in | 4 days | 3.4 in | Critical |
| Jul | 1.5 in | 6 days | 2.8 in | High |
| Aug | 1.6 in | 7 days | 2.7 in | High |
| Sep | 1.1 in | 5 days | 3.2 in | Critical |
| Oct | 1.3 in | 5 days | 3 in | High |
| Nov | 1 in | 6 days | — | None |
| Dec | 0.9 in | 7 days | — | None |
Annual total: 15.1 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.
Ravalli County Soil Profile
Soil Type
Loam
Soil pH
6.5-7.8
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 9 | Oct 8 | 121 days |
| Cautious | May 28 | Sep 27 | 122 days |
| Average year | May 21 | Sep 20 | 122 days |
| Optimistic | May 12 | Sep 12 | 123 days |
| Aggressive (risky) | May 1 | Sep 8 | 130 days |
Not very — frost dates can vary by ±39 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 6 days per decade). Spring is arriving earlier than it used to. Good news for gardeners.
Gardening Difficulty Score
Ravalli County has challenging growing conditions. Season extension and careful variety selection are essential.
Local Gardening Help in Ravalli 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 Ravalli County's climate and soil.
County Extension Office
Ravalli 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 Ravalli County
Finding local nurseries & garden centers in Ravalli County
Why Buy Local
Local nurseries carry plants that are proven to grow in your area. Staff can give you advice specific to Ravalli 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 Ravalli County MT" or "garden center Ravalli 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 Ravalli County MT" or check your extension office and local parks department. Facebook groups like "Ravalli 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 2 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
15.5 hours
Summer solstice daylight
Shortest Day
8.5 hours
Winter solstice daylight
Peak Sun Hours
11.4 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 | 8.8 hr | 4.8 hr | Short day |
| February | 10.1 hr | 5.7 hr | Short day |
| March | 11.6 hr | 7.1 hr | Short day |
| April | 13.3 hr | 8 hr | Neutral |
| May | 14.8 hr | 9.3 hr | Long day |
| June | 15.5 hr | 11.4 hr | Long day |
| July | 15.2 hr | 10.5 hr | Long day |
| August | 14 hr | 9.6 hr | Long day |
| September | 12.3 hr | 8.7 hr | Neutral |
| October | 10.7 hr | 7.2 hr | Short day |
| November | 9.2 hr | 5.1 hr | Short day |
| December | 8.5 hr | 4.6 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 | -2°F | 6°F | ❄️ Dormant | ~36 weeks |
| Feb | 0°F | 7°F | ❄️ Dormant | ~36 weeks |
| Mar | 8°F | 11°F | ❄️ Dormant | ~36 weeks |
| Apr | 20°F | 20°F | ❄️ Dormant | ~36 weeks |
| May | 34°F | 31°F | ❄️ Dormant | ~36 weeks |
| Jun | 43°F | 39°F | 🐢 Slow | ~24 weeks |
| Jul | 54°F | 48°F | ♻️ Active | ~14 weeks |
| Aug | 54°F | 50°F | ♻️ Active | ~14 weeks |
| Sep | 45°F | 44°F | 🐢 Slow | ~24 weeks |
| Oct | 32°F | 34°F | ❄️ Dormant | ~36 weeks |
| Nov | 18°F | 25°F | ❄️ Dormant | ~36 weeks |
| Dec | 6°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 Ravalli 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 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 Ravalli 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 23 | Jul 12 | — | Rapid growth, attracts pollinators, suppresses weeds |
| Sorghum-sudan grass | May 25 | Jul 26 | — | Massive biomass, breaks compaction, suppresses nematodes |
| White clover | Apr 21 | Jul 12 | ✓ 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 | Aug 23 | — | 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 11 | May 7 | ✓ Yes | Fixes nitrogen, good for heavy clay soils |
| Daikon radish | Aug 10 | May 7 | — | Deep taproot breaks compaction, excellent for clay soils |
| Hairy vetch | Jun 30 | May 7 | ✓ Yes | Excellent nitrogen fixer, good for depleted soils |
| Oats | Aug 8 | Apr 30 | — | Quick biomass, winterkills in cold zones — no spring tillage needed |
| Winter rye | Jun 22 | Apr 30 | — | Suppresses weeds, prevents erosion, breaks up compacted soil |
| Winter wheat | Jun 16 | 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: 15 mph Summer: 11 mph
Fall: 13 mph Winter: 16 mph
Prevailing wind: W. Windy area — plant a windbreak hedge on the W side of your garden.
Windbreak Benefit
7.1/10
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 2,351 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
7,525 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
Apr, May, Jul, Aug
Highest rainfall months — your barrels will fill up quickly during these months.
Months to Draw From Storage
Jun, 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 15.1 inches of rain per year
- A 1,000 sq ft roof can collect roughly 7,525 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 Ravalli County
Soil Type
Loam
Soil pH 6.5–7.8 · 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
122-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 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 Ravalli County
106 vegetables that grow well in Zone 5b with planting dates for Ravalli County.
Show all 106 vegetables with planting dates
| Plant | Start Indoors | Direct Sow | Transplant | Harvest | Days to Maturity |
|---|---|---|---|---|---|
| Acorn Squash | Apr 16 | May 28 | Jun 4 | Aug 27 – Oct 1 | 80–100 |
| Amaranth | Mar 26 | May 28 | Jun 4 | Sep 3 – Oct 22 | 90–120 |
| Arugula | Apr 16 | May 7 | May 21 | Jun 25 – Aug 27 | 30–50 |
| Asparagus | — | — | Jun 4 | — | 730–1095 |
| Beets | — | May 7 | — | Jul 2 – Jul 30 | 50–70 |
| Belgian Endive | Apr 16 | May 7 | May 21 | Sep 10 – Nov 5 | 110–150 |
| Bitter Melon | Mar 26 | May 28 | Jun 4 | Aug 6 – Sep 17 | 60–90 |
| Black Beans | — | May 28 | — | Aug 27 – Oct 15 | 90–120 |
| Bok Choy | Apr 16 | May 7 | May 21 | Jul 2 – Aug 6 | 40–60 |
| Broccoli | Apr 16 | May 7 | May 21 | Jul 23 – Sep 3 | 60–90 |
| Broccoli Rabe | Apr 16 | May 7 | May 21 | Jul 2 – Aug 6 | 40–60 |
| Brussels Sprouts | Apr 16 | May 7 | May 21 | Aug 20 – Oct 15 | 90–130 |
| Butternut Squash | Apr 16 | May 28 | Jun 4 | Sep 3 – Oct 8 | 85–110 |
| Cabbage | Apr 16 | May 7 | May 21 | Jul 23 – Sep 17 | 60–100 |
| Calabash | Mar 26 | May 28 | Jun 4 | Aug 27 – Oct 22 | 80–120 |
| Carrots | — | May 7 | — | Jul 9 – Aug 13 | 60–80 |
| Cauliflower | Apr 16 | May 7 | May 21 | Jul 16 – Sep 17 | 55–100 |
| Celeriac | Apr 16 | May 7 | May 21 | Sep 3 – Oct 8 | 100–120 |
| Celery | Apr 16 | May 7 | May 21 | Aug 13 – Oct 8 | 80–120 |
| Celtuce | Apr 16 | May 7 | May 21 | Jul 23 – Sep 3 | 60–90 |
| Chard | Apr 16 | May 7 | May 21 | Jul 16 – Sep 3 | 50–60 |
| Chickpeas | Apr 16 | May 7 | May 21 | Aug 13 – Sep 24 | 80–110 |
| Chicory | Apr 16 | May 7 | May 21 | Jul 23 – Sep 3 | 60–85 |
| Chinese Cabbage | Apr 16 | May 7 | May 21 | Jul 16 – Aug 13 | 50–70 |
| Christmas Lima Beans | Mar 26 | May 28 | Jun 4 | Aug 27 – Oct 1 | 80–100 |
| Collard Greens | Apr 16 | May 7 | May 21 | Jul 16 – Sep 17 | 55–75 |
| Corn | — | May 28 | — | Jul 30 – Sep 24 | 60–100 |
| Cowpeas | — | May 28 | — | Jul 30 – Sep 10 | 60–90 |
| Cress | Apr 16 | May 7 | May 21 | Jun 4 – Jun 25 | 14–21 |
| Crookneck Squash | Apr 16 | May 28 | Jun 4 | Jul 23 – Aug 20 | 45–60 |
| Crosne | — | May 7 | — | Oct 8 – Oct 22 | 150–200 |
| Cucumber | Apr 16 | May 28 | Jun 4 | Jul 30 – Sep 24 | 50–70 |
| Daikon | — | May 7 | — | Jul 2 – Jul 30 | 50–70 |
| Delicata Squash | Apr 16 | May 28 | Jun 4 | Aug 27 – Oct 1 | 80–100 |
| Edamame | — | May 28 | — | Aug 13 – Sep 24 | 75–100 |
| Eggplant | Mar 12 | May 28 | Jun 4 | Aug 13 – Oct 15 | 65–85 |
| Endive | Apr 16 | May 7 | May 21 | Jul 9 – Aug 13 | 45–65 |
| Escarole | Apr 16 | May 7 | May 21 | Jul 16 – Aug 13 | 50–70 |
| Fava Beans | Apr 16 | May 7 | May 21 | Aug 6 – Sep 17 | 75–100 |
| Fennel | Mar 26 | May 28 | Jun 4 | Aug 6 – Sep 17 | 60–90 |
| Garlic | — | — | — | — | 90–240 |
| Green Beans | — | May 28 | — | Jul 23 – Sep 17 | 50–65 |
| Horseradish | — | — | Jun 4 | Oct 8 – Nov 19 | 120–180 |
| Hot Peppers | Mar 12 | May 28 | Jun 4 | Aug 13 – Nov 19 | 70–120 |
| Hubbard Squash | Apr 16 | May 28 | Jun 4 | Sep 17 – Oct 22 | 100–120 |
| Kabocha | Apr 16 | May 28 | Jun 4 | Sep 3 – Oct 1 | 85–100 |
| Kai Lan | Apr 16 | May 7 | May 21 | Jul 9 – Aug 6 | 45–60 |
| Kale | Apr 16 | May 7 | May 21 | Jul 16 – Sep 10 | 50–70 |
| Kidney Beans | — | May 28 | — | Aug 27 – Oct 1 | 85–110 |
| Kohlrabi | Apr 16 | May 7 | May 21 | Jul 9 – Aug 13 | 45–65 |
| Komatsuna | Apr 16 | May 7 | May 21 | Jun 25 – Jul 30 | 35–50 |
| Leeks | Apr 16 | May 7 | May 21 | Aug 20 – Nov 5 | 90–150 |
| Lentils | Apr 16 | May 7 | May 21 | Aug 13 – Sep 24 | 80–110 |
| Lettuce | Apr 16 | May 7 | May 21 | Jun 25 – Sep 3 | 30–60 |
| Lima Beans | — | May 28 | — | Jul 30 – Sep 10 | 60–90 |
| Mache | Apr 16 | May 7 | May 21 | Jul 2 – Aug 6 | 40–60 |
| Melon | Apr 16 | May 28 | Jun 4 | Aug 13 – Oct 1 | 70–100 |
| Microgreens | Apr 16 | May 7 | May 21 | May 28 – Jun 25 | 7–21 |
| Mitsuba | Apr 16 | May 7 | May 14 | Jul 9 – Sep 3 | 50–70 |
| Mizuna | Apr 16 | May 7 | May 21 | Jun 25 – Jul 23 | 30–45 |
| Mustard Greens | Apr 16 | May 7 | May 21 | Jun 25 – Aug 27 | 30–50 |
| Napa Cabbage | Apr 16 | May 7 | May 21 | Jul 16 – Aug 20 | 55–75 |
| New Zealand Spinach | Mar 26 | May 28 | Jun 4 | Jul 30 – Aug 27 | 55–70 |
| Okra | Mar 26 | May 28 | Jun 4 | Jul 30 – Sep 24 | 50–65 |
| Onion | Apr 16 | May 7 | May 21 | Aug 20 – Oct 8 | 90–120 |
| Pac Choi | Apr 16 | May 7 | May 21 | Jul 2 – Jul 30 | 40–55 |
| Parsnip | — | May 7 | — | Aug 20 – Oct 1 | 100–130 |
| Patty Pan Squash | Apr 16 | May 28 | Jun 4 | Jul 23 – Aug 20 | 45–60 |
| Peas | Apr 16 | May 7 | May 21 | Jul 16 – Sep 10 | 55–70 |
| Peppers | Mar 12 | May 28 | Jun 4 | Aug 6 – Oct 15 | 60–90 |
| Pole Beans | Mar 26 | May 28 | Jun 4 | Jul 30 – Sep 24 | 55–70 |
| Potatoes | Mar 26 | May 28 | Jun 4 | Aug 13 – Oct 22 | 70–120 |
| Pumpkin | Apr 16 | May 28 | Jun 4 | Sep 3 – Oct 22 | 85–120 |
| Purslane | Apr 16 | May 7 | May 21 | Jul 2 – Aug 6 | 40–60 |
| Radicchio | Apr 16 | May 7 | May 21 | Jul 23 – Aug 27 | 60–80 |
| Radish | — | May 7 | — | Jun 4 – Jun 25 | 22–35 |
| Rhubarb | — | — | Jun 11 | — | 365–730 |
| Romanesco | Apr 16 | May 7 | May 21 | Aug 6 – Sep 17 | 75–100 |
| Rutabaga | — | May 7 | — | Jul 30 – Sep 3 | 80–100 |
| Salsify | — | May 7 | — | Aug 20 – Oct 1 | 100–130 |
| Savoy Cabbage | Apr 16 | May 7 | May 21 | Jul 30 – Sep 24 | 70–110 |
| Scallions | Apr 16 | May 7 | May 21 | Jul 16 – Aug 13 | 50–70 |
| Scarlet Runner Beans | Mar 26 | May 28 | Jun 4 | Aug 6 – Sep 10 | 60–80 |
| Shallot | Apr 16 | May 7 | May 21 | Aug 20 – Oct 8 | 90–120 |
| Shiso | Apr 2 | May 28 | Jun 4 | Jul 30 – Sep 24 | 50–70 |
| Snap Peas | Mar 26 | May 28 | Jun 4 | Jul 30 – Sep 24 | 55–70 |
| Snow Peas | Apr 16 | May 7 | May 21 | Jul 16 – Sep 10 | 50–65 |
| Soybeans | — | May 28 | — | Aug 20 – Oct 15 | 80–120 |
| Spaghetti Squash | Apr 16 | May 28 | Jun 4 | Sep 3 – Oct 1 | 85–100 |
| Spinach | Apr 16 | May 7 | May 21 | Jun 25 – Aug 27 | 35–50 |
| Squash (Summer) | Apr 16 | May 28 | Jun 4 | Jul 23 – Sep 24 | 45–65 |
| Squash (Winter) | Apr 16 | May 28 | Jun 4 | Aug 27 – Oct 22 | 80–120 |
| Sunchoke | — | — | Jun 4 | Sep 24 – Nov 19 | 110–150 |
| Sunflower | Mar 26 | May 28 | Jun 4 | Aug 13 – Oct 1 | 70–100 |
| Sweet Corn | — | May 28 | — | Jul 30 – Sep 10 | 60–90 |
| Sweet Potatoes | Mar 26 | May 28 | Jun 4 | Sep 3 – Oct 22 | 90–120 |
| Tatsoi | Apr 16 | May 7 | May 21 | Jun 25 – Jul 30 | 35–50 |
| Tomatillo | Mar 26 | May 28 | Jun 4 | Aug 6 – Oct 15 | 60–85 |
| Tomatoes | Mar 26 | May 28 | Jun 4 | Aug 6 – Oct 15 | 60–85 |
| Turnip | — | May 7 | — | Jun 18 – Jul 23 | 40–60 |
| Watercress | Apr 16 | May 7 | May 21 | Jul 2 – Aug 6 | 40–60 |
| Watermelon | Apr 16 | May 28 | Jun 4 | Aug 13 – Oct 1 | 70–100 |
| Wax Beans | — | May 28 | — | Jul 23 – Sep 17 | 50–65 |
| Winter Melon | Mar 26 | May 28 | Jun 4 | Sep 3 – Oct 22 | 90–120 |
| Yard Long Beans | Mar 26 | May 28 | Jun 4 | Jul 30 – Sep 10 | 55–80 |
| Zucchini | Apr 16 | May 28 | Jun 4 | Jul 23 – Sep 17 | 45–60 |
🍓 Fruits to Grow in Ravalli County
27 fruits that grow well in Zone 5b with planting dates for Ravalli County.
Show all 27 fruits with planting dates
| Plant | Start Indoors | Direct Sow | Transplant | Harvest | Days to Maturity |
|---|---|---|---|---|---|
| Alpine Strawberries | — | — | Jun 11 | Sep 10 – Nov 26 | 90–180 |
| Aronia | — | — | Jun 11 | — | 730–1095 |
| Blackberries | — | — | Jun 11 | — | 365–730 |
| Blueberries | — | — | Jun 11 | — | 730–1095 |
| Boysenberries | — | — | Jun 11 | — | 365–730 |
| Cantaloupe | — | — | Jun 11 | Aug 20 – Sep 24 | 70–90 |
| Che Fruit | — | — | Jun 11 | — | 1095–1825 |
| Cranberries | — | — | Jun 11 | — | 730–1095 |
| Currants | — | — | Jun 11 | — | 730–1095 |
| Elderberries | — | — | Jun 11 | — | 730–1095 |
| Goji Berries | — | — | Jun 11 | — | 730–1095 |
| Gooseberries | — | — | Jun 11 | — | 730–1095 |
| Grapes | — | — | Jun 11 | — | 730–1095 |
| Ground Cherry | — | — | Jun 11 | Aug 20 – Oct 15 | 65–80 |
| Hardy Kiwi | — | — | Jun 11 | — | 1095–1825 |
| Haskaps | — | — | Jun 11 | — | 730–1095 |
| Honeydew | — | — | Jun 11 | Sep 3 – Oct 15 | 80–110 |
| Jostaberry | — | — | Jun 11 | — | 730–1095 |
| Lingonberries | — | — | Jun 11 | — | 730–1095 |
| Medlar | — | — | Jun 11 | — | 1095–1825 |
| Mulberries | — | — | Jun 11 | — | 730–1825 |
| Pawpaw | — | — | Jun 11 | — | 1095–2555 |
| Persimmon | — | — | Jun 11 | — | 1095–2555 |
| Quince | — | — | Jun 11 | — | 1095–1825 |
| Raspberries | — | — | Jun 11 | — | 365–730 |
| Serviceberries | — | — | Jun 11 | — | 730–1095 |
| Strawberries | — | — | Jun 11 | Sep 10 – Nov 26 | 90–365 |
🌿 Herbs to Grow in Ravalli County
37 herbs that grow well in Zone 5b with planting dates for Ravalli County.
Show all 37 herbs with planting dates
| Plant | Start Indoors | Direct Sow | Transplant | Harvest | Days to Maturity |
|---|---|---|---|---|---|
| Angelica | Apr 16 | May 7 | May 14 | — | 365–730 |
| Anise | Apr 16 | May 7 | May 14 | Aug 13 – Oct 29 | 90–120 |
| Basil | Apr 2 | May 28 | Jun 4 | Jul 30 – Oct 1 | 50–75 |
| Bee Balm | — | — | May 28 | Aug 27 – Nov 12 | 90–120 |
| Borage | Apr 16 | May 7 | May 14 | Jul 9 – Aug 27 | 50–60 |
| Caraway | Apr 16 | May 7 | May 14 | — | 365–450 |
| Catnip | — | — | May 28 | Jul 30 – Oct 1 | 60–80 |
| Chamomile | Apr 16 | May 7 | May 14 | Jul 16 – Sep 24 | 60–90 |
| Chervil | Apr 16 | May 7 | May 14 | Jun 25 – Aug 27 | 40–60 |
| Chives | — | — | May 28 | Jul 30 – Oct 8 | 60–90 |
| Cilantro | Apr 16 | May 7 | May 14 | Jun 25 – Aug 27 | 40–60 |
| Comfrey | — | — | May 28 | Jul 30 – Oct 8 | 60–90 |
| Cumin | Apr 16 | May 7 | May 14 | Aug 27 – Oct 29 | 100–120 |
| Dill | Apr 16 | May 7 | May 14 | Jun 25 – Aug 27 | 40–60 |
| Echinacea | — | — | May 28 | Oct 1 – Nov 12 | 120–180 |
| Epazote | Apr 2 | May 28 | Jun 4 | Jul 23 – Sep 17 | 45–60 |
| Fennel (herb) | Apr 16 | May 7 | May 14 | Jul 16 – Sep 24 | 60–90 |
| Feverfew | — | — | May 28 | Aug 27 – Nov 12 | 90–120 |
| Garlic Chives | — | — | May 28 | Jul 30 – Oct 8 | 60–90 |
| Horehound | — | — | May 28 | Aug 13 – Oct 8 | 75–90 |
| Hyssop | — | — | May 28 | Aug 6 – Oct 8 | 70–90 |
| Lavender | — | — | May 28 | Aug 27 – Nov 12 | 90–200 |
| Lemon Balm | — | — | May 28 | Jul 30 – Sep 17 | 60–70 |
| Lemon Thyme | — | — | May 28 | Aug 6 – Oct 8 | 70–90 |
| Lovage | — | — | May 28 | Aug 6 – Oct 8 | 70–90 |
| Mint | — | — | May 28 | Jul 30 – Oct 8 | 60–90 |
| Oregano | — | — | May 28 | Jul 30 – Oct 8 | 60–90 |
| Parsley | Apr 16 | May 7 | May 14 | Jul 16 – Sep 17 | 60–80 |
| Rue | — | — | May 28 | Aug 6 – Oct 8 | 70–90 |
| Sage | — | — | May 28 | Aug 13 – Oct 8 | 75–90 |
| Savory | — | — | May 28 | Jul 23 – Sep 17 | 50–70 |
| Sorrel | Apr 16 | May 7 | May 14 | Jun 25 – Aug 27 | 40–60 |
| Tarragon | — | — | May 28 | Jul 30 – Oct 8 | 60–90 |
| Thai Basil | Apr 2 | May 28 | Jun 4 | Jul 30 – Oct 1 | 50–75 |
| Thyme | — | — | May 28 | Aug 6 – Oct 8 | 70–90 |
| Valerian | — | — | May 28 | Oct 1 – Nov 12 | 120–180 |
| Yarrow | — | — | May 28 | Aug 27 – Nov 12 | 90–120 |
Monthly Planting Guide for Ravalli County
Gardening Guides & Resources
Helpful guides from The Ultimate Homestead to improve your garden in Ravalli County.
Frequently Asked Questions
What planting zone is Ravalli County, MT?
Ravalli 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 Ravalli County, MT?
Based on 31 years of NOAA weather station data, the median last spring frost in Ravalli County falls around May 21. In 8 out of 10 years, last frost lands between May 1 and June 9 — a 39-day window of variability. Use June 9 as your conservative safe-to-plant date for frost-sensitive crops.
When is the first fall frost in Ravalli County, MT?
The median first fall frost in Ravalli County arrives around September 20. In cold years it can arrive as early as September 8; in mild years as late as October 8. Harvest or protect frost-sensitive crops — tomatoes, peppers, basil, squash — before this date.
How long is the growing season in Ravalli County?
Ravalli County has a frost-free growing season of approximately 122 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 5.97 days per decade.
What is the soil like in Ravalli County for gardening?
Ravalli County has predominantly Loam soil with a pH range of 6.5–7.8 and Well Drained drainage. Most vegetables and herbs grow well with standard composting and seasonal soil amendment.
What is grown commercially in Ravalli County?
Ravalli County has commercial agriculture that includes Hay, Cattle, Wheat, Sugar Beets, Barley. These crops reflect the local climate and soil conditions — what succeeds commercially often translates well to home gardens in the same area.
Is Ravalli County a good location for home gardening?
Ravalli 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 Ravalli County Garden Planner — Free
A 24-page printable planner built for Ravalli 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