Aitkin County, MN — Planting Guide
Your July planting checklist for Aitkin County, Minnesota
Your Aitkin County, Minnesota garden is entering a new phase. Here's what's on the schedule for July and why each task matters now.
-
Indoor seed-starting week for basil, peppers, and pole beans
You're about 12 weeks out from your last frost — the perfect window to get these germinating indoors.
-
Basket week: basil, carrots, and cucumber
The more you pick, the more the plant produces. Letting fruit overripen tells the plant it's time to stop.
-
Sow carrots, kale, and lettuce for an autumn harvest
A row cover ready in the garage extends your harvest by weeks once the nights turn cold.
August will be here before you know it — start on
- First harvests: basil, carrots, and cucumber
- Fall sowing: alliums, crocus, and daffodils
Aitkin County is in USDA Zone 4a. The average last spring frost is May 9 and the first fall frost is October 3, giving you a growing season of approximately 147 days.
At an elevation of 1,188 ft, Aitkin County receives approximately 35 in of rainfall annually. Summer highs average 78°F with winter lows around -5°F. The predominant soil type is Silt Loam.
Based on 31 years of NOAA climate station data, the last frost date here varies by 32 days year to year — ranging from April 24 in warm years to May 26 in cold years. The growing season is trending longer by about 1.06 days per decade. Aitkin County scores 66/100 (Good) on the Microclimate Index.
🌡️ Zone
4a (-30°F to -25°F min)
❄️ Last Frost
May 9
🍂 First Frost
October 3
📅 Growing Season
147 days
⛰️ Elevation
1,188 ft
🌧️ Annual Rainfall
35 in
Monthly Watering Calendar for Aitkin County
When you'll need to water your garden — based on average monthly rainfall vs. the ~1 inch/week most gardens need.
What this means for you: In humid climates, watering is usually about timing (morning, not evening, to prevent disease) more than volume. In dry climates, it's about depth (water deep, less often) more than frequency. Aitkin County's 35" annual tells you which side you're on.
View detailed monthly data
| Month | Avg Rainfall | Rainy Days | Extra Water Needed | Watering Effort |
|---|---|---|---|---|
| Jan | 1.4 in | 8 days | — | None |
| Feb | 1.5 in | 7 days | — | None |
| Mar | 2.6 in | 9 days | — | None |
| Apr | 3.6 in | 8 days | — | None |
| May | 3.7 in | 12 days | 0.6 in | Moderate |
| Jun | 5.1 in | 10 days | — | Low |
| Jul | 3.9 in | 9 days | 0.4 in | Low |
| Aug | 3.5 in | 7 days | 0.8 in | Moderate |
| Sep | 2.8 in | 7 days | 1.5 in | Moderate |
| Oct | 2.7 in | 7 days | — | None |
| Nov | 2.4 in | 6 days | — | None |
| Dec | 1.9 in | 8 days | — | None |
Annual total: 35.1 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.
Aitkin County Soil Profile
Soil Type
Silt Loam
Soil pH
5.8-7.1
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 26 | Oct 16 | 143 days |
| Cautious | May 12 | Oct 9 | 150 days |
| Average year | May 9 | Oct 3 | 147 days |
| Optimistic | May 1 | Oct 1 | 153 days |
| Aggressive (risky) | Apr 24 | Sep 20 | 149 days |
Not very — frost dates can vary by ±32 days year-to-year. Use the "Conservative" row in the table below, and keep row covers handy for surprise late frosts.
Yes — growing seasons are getting longer here (about 1.1 days per decade). Spring is arriving earlier than it used to. Good news for gardeners.
Gardening Difficulty Score
Aitkin County offers good growing conditions. A little planning around frost dates goes a long way.
Local Gardening Help in Aitkin 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 Aitkin County's climate and soil.
County Extension Office
Aitkin 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 Aitkin County
Finding local nurseries & garden centers in Aitkin County
Why Buy Local
Local nurseries carry plants that are proven to grow in your area. Staff can give you advice specific to Aitkin 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 Aitkin County MN" or "garden center Aitkin 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 Aitkin County MN" or check your extension office and local parks department. Facebook groups like "Aitkin 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 in Aitkin County
Monthly daylight hours and peak sun — critical for onion varieties, photoperiod-sensitive plants, and solar garden planning.
The practical takeaway: Day length is the trigger that tells lettuce, spinach, and cilantro to bolt. In Aitkin County, knowing when that day-length threshold arrives helps you plant a final round in time to harvest before it bolts.
Longest Day
15.6 hours
Summer solstice daylight
Shortest Day
8.4 hours
Winter solstice daylight
Peak Sun Hours
10 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 | 3.4 hr | Short day |
| February | 10.1 hr | 4.5 hr | Short day |
| March | 11.6 hr | 5.4 hr | Short day |
| April | 13.3 hr | 7.1 hr | Neutral |
| May | 14.8 hr | 8.7 hr | Long day |
| June | 15.6 hr | 10 hr | Long day |
| July | 15.3 hr | 10 hr | Long day |
| August | 14 hr | 8.3 hr | Long day |
| September | 12.3 hr | 6.9 hr | Neutral |
| October | 10.6 hr | 5.7 hr | Short day |
| November | 9.1 hr | 3.8 hr | Short day |
| December | 8.4 hr | 3.3 hr | Short day |
Peak sun hours factor in typical cloud cover — use these for solar panel and shade-planning calculations.
Soil Temperature & Composting in Aitkin County
Monthly soil temps tell you when to plant warm-season crops, and when your compost pile is actively working.
The practical takeaway: Cold soil = stunted starts. A bean seed planted in 55°F soil rots before it germinates. Same seed in 65°F soil sprouts in 5 days. Aitkin County's soil temperature pattern shows you the difference month to month.
Plant Warm Crops When
Soil reaches 60°F+
Soil warm enough from Jun through Aug.
Best Month to Compost
Jul
Microbial activity peaks when soil is warm.
Active Composting
4 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 | 6°F | 17°F | ❄️ Dormant | ~36 weeks |
| Feb | 7°F | 16°F | ❄️ Dormant | ~36 weeks |
| Mar | 19°F | 23°F | ❄️ Dormant | ~36 weeks |
| Apr | 35°F | 32°F | ❄️ Dormant | ~36 weeks |
| May | 48°F | 46°F | 🐢 Slow | ~24 weeks |
| Jun | 63°F | 56°F | ♻️ Active | ~14 weeks |
| Jul | 68°F | 62°F | 🔥 Peak | ~8 weeks |
| Aug | 68°F | 62°F | 🔥 Peak | ~8 weeks |
| Sep | 59°F | 59°F | ♻️ Active | ~14 weeks |
| Oct | 45°F | 48°F | 🐢 Slow | ~24 weeks |
| Nov | 30°F | 36°F | ❄️ Dormant | ~36 weeks |
| Dec | 15°F | 25°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 Aitkin County
Computed from local climate patterns — warmer, humid conditions increase pest generations and fungal disease risk.
Quick context: Pest and disease pressure is the X-factor most beginners under-plan for. Aitkin County's climate determines whether you can mostly "plant and see" or whether you need a pest-management routine from the first seedling.
Insect Pest Pressure
Moderate — common pests appear but manageable with monitoring.
Disease Risk
Low disease risk — dry conditions reduce fungal problems.
Seasonal Risk
View 4 common pests in your area
| Pest | Risk Level | Peak Months |
|---|---|---|
| Aphids | Low | Jun, Jul, Aug |
| Cabbage worms | Moderate | Jun, Jul, Aug |
| Flea beetles | Low | May, Jun, Jul |
| 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 Aitkin County
Cover crops protect bare soil, fix nitrogen, suppress weeds, and improve soil structure — with planting dates calibrated for your area.
For new gardeners: Cover crops do four things at once: fix nitrogen (legumes), suppress weeds (any), prevent erosion, and add organic matter when chopped down. Aitkin County's seasonal pattern determines which species fit which gap.
Spring Cover Crops (2 options) — Build soil before the main growing season
| Crop | Plant By | Terminate | N-Fixing | Soil Benefit |
|---|---|---|---|---|
| Buckwheat | May 15 | Jul 25 | — | Rapid growth, attracts pollinators, suppresses weeds |
| White clover | Apr 14 | Jul 25 | ✓ 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 2 | Sep 12 | — | 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 30 | Apr 25 | — | Quick biomass, winterkills in cold zones — no spring tillage needed |
| Winter rye | Jul 9 | Apr 18 | — | Suppresses weeds, prevents erosion, breaks up compacted soil |
| Winter wheat | Jun 27 | Apr 25 | — | Erosion control, weed suppression, good biomass |
Wind & Microclimate in Aitkin County
Why it matters: A 10 mph wind doesn't feel like much, but it triples leaf transpiration vs. still air. Aitkin County's 9.3 mph average means most days are gentle on plants, but consider how a 20+ mph spring gust would affect a flat of seedlings hardened off too quickly.
Wind dries soil, stresses plants, and affects frost patterns. Understanding your exposure helps with garden placement.
Seasonal Wind Speed
Spring: 11 mph Summer: 9 mph
Fall: 9 mph Winter: 13 mph
Prevailing wind: SW. Moderate wind — consider a temporary windbreak for young seedlings.
Windbreak Benefit
5.1/10
Moderately beneficial — a simple fence or trellis can protect delicate crops from wind stress.
Frost Pocket Risk
Low
Relatively flat terrain (262 ft range). Frost pocket risk is minimal — garden placement is flexible.
Rainwater Harvesting in Aitkin County
How much water you can collect, when to collect it, and what size system you need for your garden.
Quick context: Captured rainwater is better for plants than tap water (no chlorine), works during water restrictions, and reduces stormwater runoff. Aitkin County's 35" annual rainfall is a meaningful pool — most homes could capture 10,000+ gallons a year with a decent system.
Annual Collection
17,493 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 35.1 inches of rain per year
- A 1,000 sq ft roof can collect roughly 17,493 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 Aitkin County
Soil Type
Silt Loam
Soil pH 5.8–7.1 · 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
147-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 22-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 Aitkin County
95 vegetables that grow well in Zone 4a with planting dates for Aitkin County.
Show all 95 vegetables with planting dates
| Plant | Start Indoors | Direct Sow | Transplant | Fall Plant | Harvest | Days to Maturity |
|---|---|---|---|---|---|---|
| Acorn Squash | Mar 28 | May 23 | May 30 | — | Aug 22 – Sep 26 | 80–100 |
| Amaranth | Mar 7 | May 23 | May 30 | — | Aug 29 – Oct 17 | 90–120 |
| Arugula | Mar 28 | May 2 | May 9 | Jul 11 | Jun 13 – Aug 15 | 30–50 |
| Asparagus | — | — | May 23 | — | — | 730–1095 |
| Beets | — | May 2 | — | Jul 11 | Jun 27 – Jul 25 | 50–70 |
| Belgian Endive | Mar 28 | May 2 | May 9 | Jul 11 | Aug 29 – Oct 3 | 110–150 |
| Black Beans | — | May 23 | — | — | Aug 22 – Oct 10 | 90–120 |
| Bok Choy | Mar 28 | May 2 | May 9 | Jul 11 | Jun 20 – Jul 25 | 40–60 |
| Broccoli | Mar 28 | May 2 | May 9 | Jul 11 | Jul 11 – Aug 22 | 60–90 |
| Broccoli Rabe | Mar 28 | May 2 | May 9 | Jul 11 | Jun 20 – Jul 25 | 40–60 |
| Brussels Sprouts | Mar 28 | May 2 | May 9 | Jul 11 | Aug 8 – Oct 3 | 90–130 |
| Butternut Squash | Mar 28 | May 23 | May 30 | — | Aug 29 – Oct 3 | 85–110 |
| Cabbage | Mar 28 | May 2 | May 9 | Jul 11 | Jul 11 – Sep 5 | 60–100 |
| Carrots | — | May 2 | — | Jul 11 | Jul 4 – Aug 8 | 60–80 |
| Cauliflower | Mar 28 | May 2 | May 9 | Jul 11 | Jul 4 – Sep 5 | 55–100 |
| Celeriac | Mar 28 | May 2 | May 9 | Jul 11 | Aug 22 – Sep 26 | 100–120 |
| Celery | Mar 28 | May 2 | May 9 | Jul 11 | Aug 1 – Sep 26 | 80–120 |
| Celtuce | Mar 28 | May 2 | May 9 | Jul 11 | Jul 11 – Aug 22 | 60–90 |
| Chard | Mar 28 | May 2 | May 9 | Jul 11 | Jul 4 – Aug 22 | 50–60 |
| Chickpeas | Mar 28 | May 2 | May 9 | Jul 11 | Aug 1 – Sep 12 | 80–110 |
| Chicory | Mar 28 | May 2 | May 9 | Jul 11 | Jul 11 – Aug 22 | 60–85 |
| Chinese Cabbage | Mar 28 | May 2 | May 9 | Jul 11 | Jul 4 – Aug 1 | 50–70 |
| Christmas Lima Beans | Mar 7 | May 23 | May 30 | — | Aug 22 – Sep 26 | 80–100 |
| Collard Greens | Mar 28 | May 2 | May 9 | Jul 11 | Jul 4 – Sep 5 | 55–75 |
| Corn | — | May 23 | — | — | Jul 25 – Sep 19 | 60–100 |
| Cress | Mar 28 | May 2 | May 9 | Jul 11 | May 23 – Jun 13 | 14–21 |
| Crookneck Squash | Mar 28 | May 23 | May 30 | — | Jul 18 – Aug 15 | 45–60 |
| Crosne | — | May 2 | — | Jul 11 | Oct 3 – Sep 26 | 150–200 |
| Cucumber | Mar 28 | May 23 | May 30 | — | Jul 25 – Sep 19 | 50–70 |
| Daikon | — | May 2 | — | Jul 11 | Jun 27 – Jul 25 | 50–70 |
| Delicata Squash | Mar 28 | May 23 | May 30 | — | Aug 22 – Sep 26 | 80–100 |
| Edamame | — | May 23 | — | — | Aug 8 – Sep 19 | 75–100 |
| Endive | Mar 28 | May 2 | May 9 | Jul 11 | Jun 27 – Aug 1 | 45–65 |
| Escarole | Mar 28 | May 2 | May 9 | Jul 11 | Jul 4 – Aug 1 | 50–70 |
| Fava Beans | Mar 28 | May 2 | May 9 | Jul 11 | Jul 25 – Sep 5 | 75–100 |
| Fennel | Mar 7 | May 23 | May 30 | — | Aug 1 – Sep 12 | 60–90 |
| Garlic | — | — | — | Aug 22 | Nov 21 – Jan 16 | 90–240 |
| Green Beans | — | May 23 | — | — | Jul 18 – Sep 12 | 50–65 |
| Horseradish | — | — | May 23 | — | Sep 26 – Oct 17 | 120–180 |
| Hubbard Squash | Mar 28 | May 23 | May 30 | — | Sep 12 – Oct 17 | 100–120 |
| Kabocha | Mar 28 | May 23 | May 30 | — | Aug 29 – Sep 26 | 85–100 |
| Kai Lan | Mar 28 | May 2 | May 9 | Jul 11 | Jun 27 – Jul 25 | 45–60 |
| Kale | Mar 28 | May 2 | May 9 | Jul 11 | Jul 4 – Aug 29 | 50–70 |
| Kidney Beans | — | May 23 | — | — | Aug 22 – Sep 26 | 85–110 |
| Kohlrabi | Mar 28 | May 2 | May 9 | Jul 11 | Jun 27 – Aug 1 | 45–65 |
| Komatsuna | Mar 28 | May 2 | May 9 | Jul 11 | Jun 13 – Jul 18 | 35–50 |
| Leeks | Mar 28 | May 2 | May 9 | Jul 11 | Aug 8 – Oct 3 | 90–150 |
| Lentils | Mar 28 | May 2 | May 9 | Jul 11 | Aug 1 – Sep 12 | 80–110 |
| Lettuce | Mar 28 | May 2 | May 9 | Jul 11 | Jun 13 – Aug 22 | 30–60 |
| Lima Beans | — | May 23 | — | — | Jul 25 – Sep 5 | 60–90 |
| Mache | Mar 28 | May 2 | May 9 | Jul 11 | Jun 20 – Jul 25 | 40–60 |
| Melon | Mar 28 | May 23 | May 30 | — | Aug 8 – Sep 26 | 70–100 |
| Microgreens | Mar 28 | May 2 | May 9 | Jul 11 | May 16 – Jun 13 | 7–21 |
| Mitsuba | Mar 28 | May 2 | May 2 | Jul 11 | Jun 27 – Aug 22 | 50–70 |
| Mizuna | Mar 28 | May 2 | May 9 | Jul 11 | Jun 13 – Jul 11 | 30–45 |
| Mustard Greens | Mar 28 | May 2 | May 9 | Jul 11 | Jun 13 – Aug 15 | 30–50 |
| Napa Cabbage | Mar 28 | May 2 | May 9 | Jul 11 | Jul 4 – Aug 8 | 55–75 |
| Onion | Mar 28 | May 2 | May 9 | Jul 11 | Aug 8 – Sep 26 | 90–120 |
| Pac Choi | Mar 28 | May 2 | May 9 | Jul 11 | Jun 20 – Jul 18 | 40–55 |
| Parsnip | — | May 2 | — | Jul 11 | Aug 15 – Sep 26 | 100–130 |
| Patty Pan Squash | Mar 28 | May 23 | May 30 | — | Jul 18 – Aug 15 | 45–60 |
| Peas | Mar 28 | May 2 | May 9 | Jul 11 | Jul 4 – Aug 29 | 55–70 |
| Peppers | Feb 21 | May 23 | May 30 | — | Aug 1 – Oct 10 | 60–90 |
| Pole Beans | Mar 7 | May 23 | May 30 | — | Jul 25 – Sep 19 | 55–70 |
| Potatoes | Mar 7 | May 23 | May 30 | — | Aug 8 – Oct 17 | 70–120 |
| Pumpkin | Mar 28 | May 23 | May 30 | — | Aug 29 – Oct 17 | 85–120 |
| Purslane | Mar 28 | May 2 | May 9 | Jul 11 | Jun 20 – Jul 25 | 40–60 |
| Radicchio | Mar 28 | May 2 | May 9 | Jul 11 | Jul 11 – Aug 15 | 60–80 |
| Radish | — | May 2 | — | Jul 11 | May 30 – Jun 20 | 22–35 |
| Rhubarb | — | — | Jun 6 | — | — | 365–730 |
| Romanesco | Mar 28 | May 2 | May 9 | Jul 11 | Jul 25 – Sep 5 | 75–100 |
| Rutabaga | — | May 2 | — | Jul 11 | Jul 25 – Aug 29 | 80–100 |
| Salsify | — | May 2 | — | Jul 11 | Aug 15 – Sep 26 | 100–130 |
| Savoy Cabbage | Mar 28 | May 2 | May 9 | Jul 11 | Jul 18 – Sep 12 | 70–110 |
| Scallions | Mar 28 | May 2 | May 9 | Jul 11 | Jul 4 – Aug 1 | 50–70 |
| Scarlet Runner Beans | Mar 7 | May 23 | May 30 | — | Aug 1 – Sep 5 | 60–80 |
| Shallot | Mar 28 | May 2 | May 9 | Jul 11 | Aug 8 – Sep 26 | 90–120 |
| Shiso | Mar 14 | May 16 | May 30 | — | Jul 25 – Sep 19 | 50–70 |
| Snap Peas | Mar 7 | May 23 | May 30 | — | Jul 25 – Sep 19 | 55–70 |
| Snow Peas | Mar 28 | May 2 | May 9 | Jul 11 | Jul 4 – Aug 29 | 50–65 |
| Soybeans | — | May 23 | — | — | Aug 15 – Oct 10 | 80–120 |
| Spaghetti Squash | Mar 28 | May 23 | May 30 | — | Aug 29 – Sep 26 | 85–100 |
| Spinach | Mar 28 | May 2 | May 9 | Jul 11 | Jun 13 – Aug 15 | 35–50 |
| Squash (Summer) | Mar 28 | May 23 | May 30 | — | Jul 18 – Sep 19 | 45–65 |
| Squash (Winter) | Mar 28 | May 23 | May 30 | — | Aug 22 – Oct 17 | 80–120 |
| Sunchoke | — | — | May 23 | — | Sep 12 – Oct 17 | 110–150 |
| Sweet Corn | — | May 23 | — | — | Jul 25 – Sep 5 | 60–90 |
| Tatsoi | Mar 28 | May 2 | May 9 | Jul 11 | Jun 13 – Jul 18 | 35–50 |
| Tomatillo | Mar 7 | May 23 | May 30 | — | Aug 1 – Oct 10 | 60–85 |
| Tomatoes | Mar 7 | May 23 | May 30 | — | Aug 1 – Oct 10 | 60–85 |
| Turnip | — | May 2 | — | Jul 11 | Jun 13 – Jul 18 | 40–60 |
| Watercress | Mar 28 | May 2 | May 9 | Jul 11 | Jun 20 – Jul 25 | 40–60 |
| Watermelon | Mar 28 | May 23 | May 30 | — | Aug 8 – Sep 26 | 70–100 |
| Wax Beans | — | May 23 | — | — | Jul 18 – Sep 12 | 50–65 |
| Zucchini | Mar 28 | May 23 | May 30 | — | Jul 18 – Sep 12 | 45–60 |
🍓 Fruits to Grow in Aitkin County
22 fruits that grow well in Zone 4a with planting dates for Aitkin County.
Show all 22 fruits with planting dates
| Plant | Start Indoors | Direct Sow | Transplant | Fall Plant | Harvest | Days to Maturity |
|---|---|---|---|---|---|---|
| Alpine Strawberries | — | — | Jun 6 | — | Sep 5 – Oct 31 | 90–180 |
| Aronia | — | — | Jun 6 | — | — | 730–1095 |
| Blueberries | — | — | Jun 6 | — | — | 730–1095 |
| Cantaloupe | — | — | Jun 6 | — | Aug 15 – Sep 19 | 70–90 |
| Cranberries | — | — | Jun 6 | — | — | 730–1095 |
| Currants | — | — | Jun 6 | — | — | 730–1095 |
| Elderberries | — | — | Jun 6 | — | — | 730–1095 |
| Goji Berries | — | — | Jun 6 | — | — | 730–1095 |
| Gooseberries | — | — | Jun 6 | — | — | 730–1095 |
| Grapes | — | — | Jun 6 | — | — | 730–1095 |
| Ground Cherry | — | — | Jun 6 | — | Aug 15 – Oct 10 | 65–80 |
| Hardy Kiwi | — | — | Jun 6 | — | — | 1095–1825 |
| Haskaps | — | — | Jun 6 | — | — | 730–1095 |
| Honeydew | — | — | Jun 6 | — | Aug 29 – Oct 10 | 80–110 |
| Jostaberry | — | — | Jun 6 | — | — | 730–1095 |
| Lingonberries | — | — | Jun 6 | — | — | 730–1095 |
| Medlar | — | — | Jun 6 | — | — | 1095–1825 |
| Mulberries | — | — | Jun 6 | — | — | 730–1825 |
| Persimmon | — | — | Jun 6 | — | — | 1095–2555 |
| Raspberries | — | — | Jun 6 | — | — | 365–730 |
| Serviceberries | — | — | Jun 6 | — | — | 730–1095 |
| Strawberries | — | — | Jun 6 | — | Sep 5 – Oct 31 | 90–365 |
🌿 Herbs to Grow in Aitkin County
30 herbs that grow well in Zone 4a with planting dates for Aitkin County.
Show all 30 herbs with planting dates
| Plant | Start Indoors | Direct Sow | Transplant | Fall Plant | Harvest | Days to Maturity |
|---|---|---|---|---|---|---|
| Angelica | Mar 28 | May 2 | May 2 | Jul 11 | — | 365–730 |
| Anise | Mar 28 | May 2 | May 2 | Jul 11 | Aug 1 – Sep 26 | 90–120 |
| Basil | Mar 14 | May 16 | May 30 | — | Jul 25 – Sep 26 | 50–75 |
| Bee Balm | — | — | May 16 | — | Aug 15 – Oct 10 | 90–120 |
| Borage | Mar 28 | May 2 | May 2 | Jul 11 | Jun 27 – Aug 15 | 50–60 |
| Caraway | Mar 28 | May 2 | May 2 | Jul 11 | — | 365–450 |
| Catnip | — | — | May 16 | — | Jul 18 – Sep 19 | 60–80 |
| Chamomile | Mar 28 | May 2 | May 2 | Jul 11 | Jul 4 – Sep 12 | 60–90 |
| Chervil | Mar 28 | May 2 | May 2 | Jul 11 | Jun 13 – Aug 15 | 40–60 |
| Chives | — | — | May 16 | — | Jul 18 – Sep 26 | 60–90 |
| Cilantro | Mar 28 | May 2 | May 2 | Jul 11 | Jun 13 – Aug 15 | 40–60 |
| Comfrey | — | — | May 16 | — | Jul 18 – Sep 26 | 60–90 |
| Dill | Mar 28 | May 2 | May 2 | Jul 11 | Jun 13 – Aug 15 | 40–60 |
| Fennel (herb) | Mar 28 | May 2 | May 2 | Jul 11 | Jul 4 – Sep 12 | 60–90 |
| Garlic Chives | — | — | May 16 | — | Jul 18 – Sep 26 | 60–90 |
| Horehound | — | — | May 16 | — | Aug 1 – Sep 26 | 75–90 |
| Hyssop | — | — | May 16 | — | Jul 25 – Sep 26 | 70–90 |
| Lemon Balm | — | — | May 16 | — | Jul 18 – Sep 5 | 60–70 |
| Lovage | — | — | May 16 | — | Jul 25 – Sep 26 | 70–90 |
| Mint | — | — | May 16 | — | Jul 18 – Sep 26 | 60–90 |
| Oregano | — | — | May 16 | — | Jul 18 – Sep 26 | 60–90 |
| Parsley | Mar 28 | May 2 | May 2 | Jul 11 | Jul 4 – Sep 5 | 60–80 |
| Rue | — | — | May 16 | — | Jul 25 – Sep 26 | 70–90 |
| Sage | — | — | May 16 | — | Aug 1 – Sep 26 | 75–90 |
| Savory | — | — | May 16 | — | Jul 11 – Sep 5 | 50–70 |
| Sorrel | Mar 28 | May 2 | May 2 | Jul 11 | Jun 13 – Aug 15 | 40–60 |
| Tarragon | — | — | May 16 | — | Jul 18 – Sep 26 | 60–90 |
| Thai Basil | Mar 14 | May 16 | May 30 | — | Jul 25 – Sep 26 | 50–75 |
| Thyme | — | — | May 16 | — | Jul 25 – Sep 26 | 70–90 |
| Valerian | — | — | May 16 | — | Sep 19 – Oct 10 | 120–180 |
🌸 Flowers to Grow in Aitkin County
49 flowers that grow well in Zone 4a with planting dates for Aitkin County.
Show all 49 flowers with planting dates
| Plant | Start Indoors | Direct Sow | Transplant | Fall Plant | Bloom | Days to Maturity |
|---|---|---|---|---|---|---|
| Ageratum | Mar 14 | May 16 | May 16 | — | Jul 11 – Sep 19 | 60–75 |
| Alliums | — | — | — | Aug 22 | Oct 3 – Oct 24 | 28–42 |
| Astilbe | Feb 28 | — | May 23 | — | Aug 15 – Oct 10 | 70–100 |
| Bachelor's Button | Mar 21 | Apr 25 | May 9 | — | Jul 11 – Sep 12 | 60–90 |
| Begonias | Feb 21 | — | May 23 | — | Aug 1 – Oct 3 | 70–90 |
| Black-eyed Susan | Feb 28 | May 9 | May 23 | — | Aug 15 – Oct 24 | 60–80 |
| Bleeding Hearts | Feb 28 | — | May 23 | — | Jul 18 – Aug 29 | 60–90 |
| Calendula | Mar 21 | Apr 25 | May 9 | — | Jun 27 – Sep 12 | 50–70 |
| Celosia | Mar 28 | May 23 | May 23 | — | Jul 25 – Oct 10 | 60–90 |
| Columbine | Feb 28 | May 23 | May 23 | — | Jul 18 – Aug 29 | 70–100 |
| Coreopsis | Feb 28 | May 16 | May 23 | — | Aug 8 – Oct 24 | 60–80 |
| Cosmos | Apr 11 | May 16 | May 16 | — | Jul 25 – Oct 10 | 60–90 |
| Crocus | — | — | — | Aug 22 | Jun 27 – Jul 18 | 10–20 |
| Daffodils | — | — | — | Aug 22 | Jul 4 – Jul 25 | 20–40 |
| Dahlias | Apr 11 | May 23 | May 23 | — | Aug 22 – Oct 24 | 70–120 |
| Daylily | Feb 28 | — | May 23 | — | Aug 22 – Oct 24 | 60–90 |
| Dianthus | Mar 7 | Apr 18 | May 2 | — | Jun 20 – Aug 22 | 60–80 |
| Echinacea (Purple Coneflower) | Feb 28 | May 23 | May 23 | — | Aug 22 – Oct 24 | 70–90 |
| Foxglove | Feb 28 | May 23 | May 23 | — | Jul 18 – Aug 29 | 80–120 |
| Gaillardia (Blanket Flower) | Mar 14 | May 23 | May 23 | — | Aug 1 – Oct 31 | 70–100 |
| Geraniums | Feb 21 | — | May 23 | — | Aug 1 – Oct 3 | 70–100 |
| Gladiolus | — | May 16 | May 16 | — | Aug 15 – Oct 17 | 70–100 |
| Hostas | Feb 21 | — | May 23 | — | Aug 22 – Oct 24 | 60–90 |
| Hyacinths | — | — | — | Aug 22 | Jul 25 – Aug 15 | 14–28 |
| Hydrangeas | Feb 21 | — | May 23 | — | Aug 15 – Oct 10 | 90–150 |
| Impatiens | Mar 7 | — | May 23 | — | Aug 8 – Oct 3 | 60–75 |
| Irises | — | Division | May 23 | — | Jul 18 – Aug 15 | 60–100 |
| Larkspur | — | Apr 4 | — | — | Jun 13 – Jul 25 | 60–90 |
| Lilies | — | Division | May 23 | — | Aug 15 – Oct 17 | 70–120 |
| Lobelia | Feb 28 | — | May 9 | — | Jul 4 – Aug 29 | 70–80 |
| Lupine | Feb 28 | May 23 | May 23 | — | Jul 18 – Aug 29 | 75–100 |
| Marigolds | Mar 28 | May 23 | May 23 | — | Jul 18 – Oct 3 | 50–70 |
| Nasturtium | Apr 11 | May 23 | May 23 | — | Jul 18 – Oct 3 | 55–65 |
| Pansy | Feb 21 | — | May 9 | — | Jul 4 – Aug 22 | 70–90 |
| Peonies | — | Division | May 23 | — | Aug 1 – Sep 5 | 90–120 |
| Petunia | Mar 7 | — | May 23 | — | Aug 8 – Oct 10 | 70–90 |
| Phlox | Feb 28 | May 23 | May 23 | — | Aug 15 – Oct 17 | 80–110 |
| Portulaca | Mar 28 | May 23 | May 23 | — | Jul 11 – Sep 19 | 50–70 |
| Roses | Feb 21 | — | May 23 | — | Aug 15 – Oct 24 | 90–180 |
| Salvia | Feb 28 | — | May 23 | — | Aug 1 – Oct 3 | 70–90 |
| Sedum (Stonecrop) | Feb 28 | — | May 23 | — | Sep 26 – Nov 14 | 60–90 |
| Snapdragon | Feb 21 | — | May 9 | — | Jul 18 – Sep 12 | 70–100 |
| Sunflower | Apr 18 | May 23 | May 23 | — | Aug 15 – Oct 10 | 70–100 |
| Sweet Alyssum | Mar 14 | May 2 | May 9 | — | Jun 20 – Aug 22 | 45–60 |
| Sweet Pea | Mar 21 | Apr 4 | May 9 | — | Aug 1 – Sep 12 | 65–85 |
| Tulips | — | — | — | Aug 22 | Jul 18 – Aug 8 | 15–30 |
| Vinca (Annual) | Feb 21 | — | May 23 | — | Aug 1 – Oct 3 | 70–90 |
| Yarrow | Feb 28 | May 9 | May 23 | — | Aug 8 – Oct 24 | 60–90 |
| Zinnia | Apr 11 | May 23 | May 23 | — | Aug 1 – Oct 10 | 60–70 |
Monthly Planting Guide for Aitkin County
Gardening Guides & Resources
Helpful guides from The Ultimate Homestead to improve your garden in Aitkin County.
Frequently Asked Questions
What planting zone is Aitkin County, MN?
Aitkin County is in USDA Hardiness Zone 4a. 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 Aitkin County, MN?
Based on 31 years of NOAA weather station data, the median last spring frost in Aitkin County falls around May 9. In 8 out of 10 years, last frost lands between April 24 and May 26 — a 32-day window of variability. Use May 26 as your conservative safe-to-plant date for frost-sensitive crops.
When is the first fall frost in Aitkin County, MN?
The median first fall frost in Aitkin County arrives around October 3. In cold years it can arrive as early as September 20; in mild years as late as October 16. Harvest or protect frost-sensitive crops — tomatoes, peppers, basil, squash — before this date.
How long is the growing season in Aitkin County?
Aitkin County has a frost-free growing season of approximately 147 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 1.06 days per decade.
What is the soil like in Aitkin County for gardening?
Aitkin County has predominantly Silt Loam soil with a pH range of 5.8–7.1 and Well Drained drainage. Most vegetables and herbs grow well with standard composting and seasonal soil amendment.
What is grown commercially in Aitkin County?
Aitkin County has commercial agriculture that includes Corn, Soybeans, Hay, 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 Aitkin County a good location for home gardening?
Aitkin County scores 66/100 (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.
Your Aitkin County Garden Planner — Free
A 22-page printable planner built for Aitkin County (Zone 4a). 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