Brown County, MN — Planting Guide
Brown County is in USDA Zone 4b. The average last spring frost is April 30 and the first fall frost is October 7, giving you a growing season of approximately 160 days.
At an elevation of 1,199 ft, Brown County receives approximately 31.8 in of rainfall annually. Summer highs average 83°F with winter lows around 1°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 14 in warm years to May 15 in cold years. The growing season is trending longer by about 1.62 days per decade. Brown County scores 63/100 (Good) on the Microclimate Index.
🌡️ Zone
4b (-25°F to -20°F min)
❄️ Last Frost
April 30
🍂 First Frost
October 7
📅 Growing Season
160 days
⛰️ Elevation
1,199 ft
🌧️ Annual Rainfall
31.8 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 | 1.4 in | 7 days | — | None |
| Feb | 1.2 in | 6 days | — | None |
| Mar | 2.4 in | 7 days | — | None |
| Apr | 3.4 in | 9 days | 0.9 in | Moderate |
| May | 3.6 in | 10 days | 0.7 in | Moderate |
| Jun | 4 in | 10 days | 0.3 in | Low |
| Jul | 3.6 in | 8 days | 0.7 in | Moderate |
| Aug | 3.3 in | 8 days | 1 in | Moderate |
| Sep | 2.8 in | 9 days | 1.5 in | Moderate |
| Oct | 2 in | 7 days | 2.3 in | High |
| Nov | 2.2 in | 8 days | — | None |
| Dec | 1.9 in | 7 days | — | None |
Annual total: 31.8 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.
Brown County Soil Profile
Soil Type
Silt Loam
Soil pH
6.1-7
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) | May 15 | Oct 21 | 159 days |
| Cautious | May 4 | Oct 12 | 161 days |
| Average year | Apr 30 | Oct 7 | 160 days |
| Optimistic | Apr 24 | Sep 29 | 158 days |
| Aggressive (risky) | Apr 14 | Sep 20 | 159 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 1.6 days per decade). Spring is arriving earlier than it used to. Good news for gardeners.
Gardening Difficulty Score
Brown County offers good growing conditions. A little planning around frost dates goes a long way.
Local Gardening Help in Brown 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 Brown County's climate and soil.
County Extension Office
Brown 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 Brown County
Finding local nurseries & garden centers in Brown County
Why Buy Local
Local nurseries carry plants that are proven to grow in your area. Staff can give you advice specific to Brown 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 Brown County MN" or "garden center Brown 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 Brown County MN" or check your extension office and local parks department. Facebook groups like "Brown 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
15.3 hours
Summer solstice daylight
Shortest Day
8.7 hours
Winter solstice daylight
Peak Sun Hours
10.2 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 hr | 3.7 hr | Short day |
| February | 10.2 hr | 4.5 hr | Short day |
| March | 11.6 hr | 5.4 hr | Short day |
| April | 13.2 hr | 6.7 hr | Neutral |
| May | 14.6 hr | 8.9 hr | Long day |
| June | 15.3 hr | 9 hr | Long day |
| July | 15 hr | 10.2 hr | Long day |
| August | 13.8 hr | 8.4 hr | Neutral |
| September | 12.3 hr | 7.2 hr | Neutral |
| October | 10.7 hr | 5.5 hr | Short day |
| November | 9.4 hr | 3.8 hr | Short day |
| December | 8.7 hr | 3.4 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 | 15°F | 23°F | ❄️ Dormant | ~36 weeks |
| Feb | 14°F | 22°F | ❄️ Dormant | ~36 weeks |
| Mar | 27°F | 27°F | ❄️ Dormant | ~36 weeks |
| Apr | 42°F | 38°F | 🐢 Slow | ~24 weeks |
| May | 54°F | 50°F | ♻️ Active | ~14 weeks |
| Jun | 65°F | 59°F | ♻️ Active | ~14 weeks |
| Jul | 73°F | 65°F | 🔥 Peak | ~8 weeks |
| Aug | 74°F | 67°F | 🔥 Peak | ~8 weeks |
| Sep | 66°F | 65°F | 🔥 Peak | ~8 weeks |
| Oct | 50°F | 53°F | 🐢 Slow | ~24 weeks |
| Nov | 37°F | 43°F | ❄️ Dormant | ~36 weeks |
| Dec | 24°F | 30°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 Brown 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 |
| Cabbage worms | Low | Jun, Jul, Aug |
| Colorado potato beetle | Moderate | Jun, Jul |
| Flea beetles | Low | May, Jun, Jul |
| Slugs | Moderate | May, Jun, Jul, Aug, Sep |
Organic pest management tips
- Maintain healthy soil with regular compost additions to build natural pest resistance
- Practice crop rotation annually to break pest cycles
- Encourage beneficial insects with flowering herbs like dill, fennel, and yarrow
Cover Crops for Brown 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 8 | Jul 29 | — | Rapid growth, attracts pollinators, suppresses weeds |
| White clover | Apr 2 | Aug 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 | May 29 | Sep 16 | — | Deep roots break compaction, attract pollinators and beneficial insects |
Fall Cover Crops (5 options) — Plant after harvest to protect soil over winter
| Crop | Plant By | Terminate | N-Fixing | Soil Benefit |
|---|---|---|---|---|
| Daikon radish | Aug 19 | Apr 9 | — | Deep taproot breaks compaction, excellent for clay soils |
| Hairy vetch | Jul 20 | Apr 9 | ✓ Yes | Excellent nitrogen fixer, good for depleted soils |
| Oats | Aug 26 | Apr 16 | — | Quick biomass, winterkills in cold zones — no spring tillage needed |
| Winter rye | Jul 10 | Apr 16 | — | Suppresses weeds, prevents erosion, breaks up compacted soil |
| Winter wheat | Jul 16 | Apr 16 | — | 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: 9 mph
Fall: 9 mph Winter: 11 mph
Prevailing wind: SW. Moderate wind — consider a temporary windbreak for young seedlings.
Windbreak Benefit
5.5/10
Moderately beneficial — a simple fence or trellis can protect delicate crops from wind stress.
Frost Pocket Risk
Low
Relatively flat terrain (81 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
15,849 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
Apr, May, Jun, Jul
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 31.8 inches of rain per year
- A 1,000 sq ft roof can collect roughly 15,849 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 Brown County
Soil Type
Silt Loam
Soil pH 6.1–7 · Moderately Well 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
160-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.
Free Garden Planner
Plan your entire garden season — organize planting dates, track what you're growing, and know exactly when to start seeds, transplant, and harvest.
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 Brown County
96 vegetables that grow well in Zone 4b with planting dates for Brown County.
Show all 96 vegetables with planting dates
| Plant | Start Indoors | Direct Sow | Transplant | Harvest | Days to Maturity |
|---|---|---|---|---|---|
| Acorn Squash | Mar 19 | May 14 | May 21 | Aug 13 – Sep 17 | 80–100 |
| Amaranth | Feb 26 | May 14 | May 21 | Aug 20 – Oct 8 | 90–120 |
| Arugula | Mar 19 | Apr 23 | Apr 30 | Jun 4 – Aug 6 | 30–50 |
| Asparagus | — | — | May 14 | — | 730–1095 |
| Beets | — | Apr 23 | — | Jun 18 – Jul 16 | 50–70 |
| Belgian Endive | Mar 19 | Apr 23 | Apr 30 | Aug 20 – Sep 24 | 110–150 |
| Black Beans | — | May 14 | — | Aug 13 – Oct 1 | 90–120 |
| Bok Choy | Mar 19 | Apr 23 | Apr 30 | Jun 11 – Jul 16 | 40–60 |
| Broccoli | Mar 19 | Apr 23 | Apr 30 | Jul 2 – Aug 13 | 60–90 |
| Broccoli Rabe | Mar 19 | Apr 23 | Apr 30 | Jun 11 – Jul 16 | 40–60 |
| Brussels Sprouts | Mar 19 | Apr 23 | Apr 30 | Jul 30 – Sep 24 | 90–130 |
| Butternut Squash | Mar 19 | May 14 | May 21 | Aug 20 – Sep 24 | 85–110 |
| Cabbage | Mar 19 | Apr 23 | Apr 30 | Jul 2 – Aug 27 | 60–100 |
| Carrots | — | Apr 23 | — | Jun 25 – Jul 30 | 60–80 |
| Cauliflower | Mar 19 | Apr 23 | Apr 30 | Jun 25 – Aug 27 | 55–100 |
| Celeriac | Mar 19 | Apr 23 | Apr 30 | Aug 13 – Sep 17 | 100–120 |
| Celery | Mar 19 | Apr 23 | Apr 30 | Jul 23 – Sep 17 | 80–120 |
| Celtuce | Mar 19 | Apr 23 | Apr 30 | Jul 2 – Aug 13 | 60–90 |
| Chard | Mar 19 | Apr 23 | Apr 30 | Jun 25 – Aug 13 | 50–60 |
| Chickpeas | Mar 19 | Apr 23 | Apr 30 | Jul 23 – Sep 3 | 80–110 |
| Chicory | Mar 19 | Apr 23 | Apr 30 | Jul 2 – Aug 13 | 60–85 |
| Chinese Cabbage | Mar 19 | Apr 23 | Apr 30 | Jun 25 – Jul 23 | 50–70 |
| Christmas Lima Beans | Feb 26 | May 14 | May 21 | Aug 13 – Sep 17 | 80–100 |
| Collard Greens | Mar 19 | Apr 23 | Apr 30 | Jun 25 – Aug 27 | 55–75 |
| Corn | — | May 14 | — | Jul 16 – Sep 10 | 60–100 |
| Cress | Mar 19 | Apr 23 | Apr 30 | May 14 – Jun 4 | 14–21 |
| Crookneck Squash | Mar 19 | May 14 | May 21 | Jul 9 – Aug 6 | 45–60 |
| Crosne | — | Apr 23 | — | Sep 24 – Sep 17 | 150–200 |
| Cucumber | Mar 19 | May 14 | May 21 | Jul 16 – Sep 10 | 50–70 |
| Daikon | — | Apr 23 | — | Jun 18 – Jul 16 | 50–70 |
| Delicata Squash | Mar 19 | May 14 | May 21 | Aug 13 – Sep 17 | 80–100 |
| Edamame | — | May 14 | — | Jul 30 – Sep 10 | 75–100 |
| Endive | Mar 19 | Apr 23 | Apr 30 | Jun 18 – Jul 23 | 45–65 |
| Escarole | Mar 19 | Apr 23 | Apr 30 | Jun 25 – Jul 23 | 50–70 |
| Fava Beans | Mar 19 | Apr 23 | Apr 30 | Jul 16 – Aug 27 | 75–100 |
| Fennel | Feb 26 | May 14 | May 21 | Jul 23 – Sep 3 | 60–90 |
| Garlic | — | — | — | — | 90–240 |
| Green Beans | — | May 14 | — | Jul 9 – Sep 3 | 50–65 |
| Horseradish | — | — | May 14 | Sep 17 – Oct 8 | 120–180 |
| Hubbard Squash | Mar 19 | May 14 | May 21 | Sep 3 – Oct 8 | 100–120 |
| Kabocha | Mar 19 | May 14 | May 21 | Aug 20 – Sep 17 | 85–100 |
| Kai Lan | Mar 19 | Apr 23 | Apr 30 | Jun 18 – Jul 16 | 45–60 |
| Kale | Mar 19 | Apr 23 | Apr 30 | Jun 25 – Aug 20 | 50–70 |
| Kidney Beans | — | May 14 | — | Aug 13 – Sep 17 | 85–110 |
| Kohlrabi | Mar 19 | Apr 23 | Apr 30 | Jun 18 – Jul 23 | 45–65 |
| Komatsuna | Mar 19 | Apr 23 | Apr 30 | Jun 4 – Jul 9 | 35–50 |
| Leeks | Mar 19 | Apr 23 | Apr 30 | Jul 30 – Sep 24 | 90–150 |
| Lentils | Mar 19 | Apr 23 | Apr 30 | Jul 23 – Sep 3 | 80–110 |
| Lettuce | Mar 19 | Apr 23 | Apr 30 | Jun 4 – Aug 13 | 30–60 |
| Lima Beans | — | May 14 | — | Jul 16 – Aug 27 | 60–90 |
| Mache | Mar 19 | Apr 23 | Apr 30 | Jun 11 – Jul 16 | 40–60 |
| Melon | Mar 19 | May 14 | May 21 | Jul 30 – Sep 17 | 70–100 |
| Microgreens | Mar 19 | Apr 23 | Apr 30 | May 7 – Jun 4 | 7–21 |
| Mitsuba | Mar 19 | Apr 23 | Apr 23 | Jun 18 – Aug 13 | 50–70 |
| Mizuna | Mar 19 | Apr 23 | Apr 30 | Jun 4 – Jul 2 | 30–45 |
| Mustard Greens | Mar 19 | Apr 23 | Apr 30 | Jun 4 – Aug 6 | 30–50 |
| Napa Cabbage | Mar 19 | Apr 23 | Apr 30 | Jun 25 – Jul 30 | 55–75 |
| Onion | Mar 19 | Apr 23 | Apr 30 | Jul 30 – Sep 17 | 90–120 |
| Pac Choi | Mar 19 | Apr 23 | Apr 30 | Jun 11 – Jul 9 | 40–55 |
| Parsnip | — | Apr 23 | — | Aug 6 – Sep 17 | 100–130 |
| Patty Pan Squash | Mar 19 | May 14 | May 21 | Jul 9 – Aug 6 | 45–60 |
| Peas | Mar 19 | Apr 23 | Apr 30 | Jun 25 – Aug 20 | 55–70 |
| Peppers | Feb 12 | May 14 | May 21 | Jul 23 – Oct 1 | 60–90 |
| Pole Beans | Feb 26 | May 14 | May 21 | Jul 16 – Sep 10 | 55–70 |
| Potatoes | Feb 26 | May 14 | May 21 | Jul 30 – Oct 8 | 70–120 |
| Pumpkin | Mar 19 | May 14 | May 21 | Aug 20 – Oct 8 | 85–120 |
| Purslane | Mar 19 | Apr 23 | Apr 30 | Jun 11 – Jul 16 | 40–60 |
| Radicchio | Mar 19 | Apr 23 | Apr 30 | Jul 2 – Aug 6 | 60–80 |
| Radish | — | Apr 23 | — | May 21 – Jun 11 | 22–35 |
| Rhubarb | — | — | May 28 | — | 365–730 |
| Romanesco | Mar 19 | Apr 23 | Apr 30 | Jul 16 – Aug 27 | 75–100 |
| Rutabaga | — | Apr 23 | — | Jul 16 – Aug 20 | 80–100 |
| Salsify | — | Apr 23 | — | Aug 6 – Sep 17 | 100–130 |
| Savoy Cabbage | Mar 19 | Apr 23 | Apr 30 | Jul 9 – Sep 3 | 70–110 |
| Scallions | Mar 19 | Apr 23 | Apr 30 | Jun 25 – Jul 23 | 50–70 |
| Scarlet Runner Beans | Feb 26 | May 14 | May 21 | Jul 23 – Aug 27 | 60–80 |
| Shallot | Mar 19 | Apr 23 | Apr 30 | Jul 30 – Sep 17 | 90–120 |
| Shiso | Mar 5 | May 7 | May 21 | Jul 16 – Sep 10 | 50–70 |
| Snap Peas | Feb 26 | May 14 | May 21 | Jul 16 – Sep 10 | 55–70 |
| Snow Peas | Mar 19 | Apr 23 | Apr 30 | Jun 25 – Aug 20 | 50–65 |
| Soybeans | — | May 14 | — | Aug 6 – Oct 1 | 80–120 |
| Spaghetti Squash | Mar 19 | May 14 | May 21 | Aug 20 – Sep 17 | 85–100 |
| Spinach | Mar 19 | Apr 23 | Apr 30 | Jun 4 – Aug 6 | 35–50 |
| Squash (Summer) | Mar 19 | May 14 | May 21 | Jul 9 – Sep 10 | 45–65 |
| Squash (Winter) | Mar 19 | May 14 | May 21 | Aug 13 – Oct 8 | 80–120 |
| Sunchoke | — | — | May 14 | Sep 3 – Oct 8 | 110–150 |
| Sunflower | Feb 26 | May 14 | May 21 | Jul 30 – Sep 17 | 70–100 |
| Sweet Corn | — | May 14 | — | Jul 16 – Aug 27 | 60–90 |
| Tatsoi | Mar 19 | Apr 23 | Apr 30 | Jun 4 – Jul 9 | 35–50 |
| Tomatillo | Feb 26 | May 14 | May 21 | Jul 23 – Oct 1 | 60–85 |
| Tomatoes | Feb 26 | May 14 | May 21 | Jul 23 – Oct 1 | 60–85 |
| Turnip | — | Apr 23 | — | Jun 4 – Jul 9 | 40–60 |
| Watercress | Mar 19 | Apr 23 | Apr 30 | Jun 11 – Jul 16 | 40–60 |
| Watermelon | Mar 19 | May 14 | May 21 | Jul 30 – Sep 17 | 70–100 |
| Wax Beans | — | May 14 | — | Jul 9 – Sep 3 | 50–65 |
| Zucchini | Mar 19 | May 14 | May 21 | Jul 9 – Sep 3 | 45–60 |
🍓 Fruits to Grow in Brown County
22 fruits that grow well in Zone 4b with planting dates for Brown County.
Show all 22 fruits with planting dates
| Plant | Start Indoors | Direct Sow | Transplant | Harvest | Days to Maturity |
|---|---|---|---|---|---|
| Alpine Strawberries | — | — | May 28 | Aug 27 – Oct 22 | 90–180 |
| Aronia | — | — | May 28 | — | 730–1095 |
| Blueberries | — | — | May 28 | — | 730–1095 |
| Cantaloupe | — | — | May 28 | Aug 6 – Sep 10 | 70–90 |
| Cranberries | — | — | May 28 | — | 730–1095 |
| Currants | — | — | May 28 | — | 730–1095 |
| Elderberries | — | — | May 28 | — | 730–1095 |
| Goji Berries | — | — | May 28 | — | 730–1095 |
| Gooseberries | — | — | May 28 | — | 730–1095 |
| Grapes | — | — | May 28 | — | 730–1095 |
| Ground Cherry | — | — | May 28 | Aug 6 – Oct 1 | 65–80 |
| Hardy Kiwi | — | — | May 28 | — | 1095–1825 |
| Haskaps | — | — | May 28 | — | 730–1095 |
| Honeydew | — | — | May 28 | Aug 20 – Oct 1 | 80–110 |
| Jostaberry | — | — | May 28 | — | 730–1095 |
| Lingonberries | — | — | May 28 | — | 730–1095 |
| Medlar | — | — | May 28 | — | 1095–1825 |
| Mulberries | — | — | May 28 | — | 730–1825 |
| Persimmon | — | — | May 28 | — | 1095–2555 |
| Raspberries | — | — | May 28 | — | 365–730 |
| Serviceberries | — | — | May 28 | — | 730–1095 |
| Strawberries | — | — | May 28 | Aug 27 – Oct 22 | 90–365 |
🌿 Herbs to Grow in Brown County
32 herbs that grow well in Zone 4b with planting dates for Brown County.
Show all 32 herbs with planting dates
| Plant | Start Indoors | Direct Sow | Transplant | Harvest | Days to Maturity |
|---|---|---|---|---|---|
| Angelica | Mar 19 | Apr 23 | Apr 23 | — | 365–730 |
| Anise | Mar 19 | Apr 23 | Apr 23 | Jul 23 – Sep 17 | 90–120 |
| Basil | Mar 5 | May 7 | May 21 | Jul 16 – Sep 17 | 50–75 |
| Bee Balm | — | — | May 7 | Aug 6 – Oct 1 | 90–120 |
| Borage | Mar 19 | Apr 23 | Apr 23 | Jun 18 – Aug 6 | 50–60 |
| Caraway | Mar 19 | Apr 23 | Apr 23 | — | 365–450 |
| Catnip | — | — | May 7 | Jul 9 – Sep 10 | 60–80 |
| Chamomile | Mar 19 | Apr 23 | Apr 23 | Jun 25 – Sep 3 | 60–90 |
| Chervil | Mar 19 | Apr 23 | Apr 23 | Jun 4 – Aug 6 | 40–60 |
| Chives | — | — | May 7 | Jul 9 – Sep 17 | 60–90 |
| Cilantro | Mar 19 | Apr 23 | Apr 23 | Jun 4 – Aug 6 | 40–60 |
| Comfrey | — | — | May 7 | Jul 9 – Sep 17 | 60–90 |
| Dill | Mar 19 | Apr 23 | Apr 23 | Jun 4 – Aug 6 | 40–60 |
| Echinacea | — | — | May 7 | Sep 10 – Oct 1 | 120–180 |
| Fennel (herb) | Mar 19 | Apr 23 | Apr 23 | Jun 25 – Sep 3 | 60–90 |
| Garlic Chives | — | — | May 7 | Jul 9 – Sep 17 | 60–90 |
| Horehound | — | — | May 7 | Jul 23 – Sep 17 | 75–90 |
| Hyssop | — | — | May 7 | Jul 16 – Sep 17 | 70–90 |
| Lemon Balm | — | — | May 7 | Jul 9 – Aug 27 | 60–70 |
| Lovage | — | — | May 7 | Jul 16 – Sep 17 | 70–90 |
| Mint | — | — | May 7 | Jul 9 – Sep 17 | 60–90 |
| Oregano | — | — | May 7 | Jul 9 – Sep 17 | 60–90 |
| Parsley | Mar 19 | Apr 23 | Apr 23 | Jun 25 – Aug 27 | 60–80 |
| Rue | — | — | May 7 | Jul 16 – Sep 17 | 70–90 |
| Sage | — | — | May 7 | Jul 23 – Sep 17 | 75–90 |
| Savory | — | — | May 7 | Jul 2 – Aug 27 | 50–70 |
| Sorrel | Mar 19 | Apr 23 | Apr 23 | Jun 4 – Aug 6 | 40–60 |
| Tarragon | — | — | May 7 | Jul 9 – Sep 17 | 60–90 |
| Thai Basil | Mar 5 | May 7 | May 21 | Jul 16 – Sep 17 | 50–75 |
| Thyme | — | — | May 7 | Jul 16 – Sep 17 | 70–90 |
| Valerian | — | — | May 7 | Sep 10 – Oct 1 | 120–180 |
| Yarrow | — | — | May 7 | Aug 6 – Oct 1 | 90–120 |
Monthly Planting Guide for Brown County
Gardening Guides & Resources
Helpful guides from The Ultimate Homestead to improve your garden in Brown County.
Frequently Asked Questions
What planting zone is Brown County, MN?
Brown County is in USDA Hardiness Zone 4b. 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 Brown County, MN?
Based on 31 years of NOAA weather station data, the median last spring frost in Brown County falls around April 30. In 8 out of 10 years, last frost lands between April 14 and May 15 — a 30-day window of variability. Use May 15 as your conservative safe-to-plant date for frost-sensitive crops.
When is the first fall frost in Brown County, MN?
The median first fall frost in Brown County arrives around October 7. In cold years it can arrive as early as September 20; in mild years as late as October 21. Harvest or protect frost-sensitive crops — tomatoes, peppers, basil, squash — before this date.
How long is the growing season in Brown County?
Brown County has a frost-free growing season of approximately 160 days. This is enough time for most warm-season crops including tomatoes, peppers, and squash with proper timing. Climate records show the growing season is trending longer by about 1.62 days per decade.
What is the soil like in Brown County for gardening?
Brown County has predominantly Silt Loam soil with a pH range of 6.1–7 and Moderately Well Drained drainage. Most vegetables and herbs grow well with standard composting and seasonal soil amendment.
What is grown commercially in Brown County?
Brown County has commercial agriculture that includes Soybeans, Corn, Hay, Dairy, Sweet Corn. These crops reflect the local climate and soil conditions — what succeeds commercially often translates well to home gardens in the same area.
Is Brown County a good location for home gardening?
Brown County scores 63/100 (Good) 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.
Plan Your Garden with Confidence
Get our free Garden Planner — designed to help Brown County gardeners in Zone 4b organize planting dates, track what's growing, and never miss a planting window.
Get Your Free Garden Planner →Free download. Plan your entire garden season in minutes.
