McHenry County, ND — Planting Guide
McHenry County, North Dakota gardeners: here's your June plan
Your garden in McHenry County, North Dakota is working on a schedule, even when you're not. Here's where you should be this June.
-
Set out basil, cucumber, and peppers seedlings
Water the tray well an hour before you transplant. Roots slide out cleanly and settle in faster.
-
Begin indoor sowing: cucumber, kale, and lettuce
You're about 14 weeks out from your last frost — the perfect window to get these germinating indoors.
-
Collect lettuce, radish, and arugula at their peak
Check every 1–2 days. Many of these get tough or go to seed if you wait too long.
-
Direct-sow carrots, kale, and lettuce for cool weather
Keep young seedlings shaded and moist in summer heat. A row of taller crops works as natural shade.
Get ahead of July
- Starting indoors: basil, pole beans, and thai basil
- First harvests: carrots, green beans, and kale
McHenry County is in USDA Zone 4a. The average last spring frost is May 17 and the first fall frost is September 22, giving you a growing season of approximately 128 days.
At an elevation of 661 ft, McHenry County receives approximately 22.4 in of rainfall annually. Summer highs average 80°F with winter lows around -3°F. The predominant soil type is Loam.
Based on 31 years of NOAA climate station data, the last frost date here varies by 27 days year to year — ranging from April 30 in warm years to May 28 in cold years. The growing season is trending longer by about 2.33 days per decade. McHenry County scores 50/100 (Moderate) on the Microclimate Index.
🌡️ Zone
4a (-30°F to -25°F min)
❄️ Last Frost
May 17
🍂 First Frost
September 22
📅 Growing Season
128 days
⛰️ Elevation
661 ft
🌧️ Annual Rainfall
22.4 in
Monthly Watering Calendar for McHenry County
When you'll need to water your garden — based on average monthly rainfall vs. the ~1 inch/week most gardens need.
Why this matters: A drip irrigation system pays for itself in 1-2 seasons in any climate. McHenry County's 22" annual rainfall determines whether you'll run it weekly (dry zones) or maybe just during summer dry spells (wet zones).
View detailed monthly data
| Month | Avg Rainfall | Rainy Days | Extra Water Needed | Watering Effort |
|---|---|---|---|---|
| Jan | 1.5 in | 5 days | — | None |
| Feb | 1.2 in | 6 days | — | None |
| Mar | 1.7 in | 8 days | — | None |
| Apr | 2.3 in | 8 days | — | None |
| May | 3 in | 8 days | 1.3 in | Moderate |
| Jun | 1.6 in | 4 days | 2.7 in | High |
| Jul | 2 in | 6 days | 2.3 in | High |
| Aug | 2.4 in | 6 days | 1.9 in | High |
| Sep | 2.1 in | 5 days | 2.2 in | High |
| Oct | 1.7 in | 6 days | — | None |
| Nov | 1.4 in | 6 days | — | None |
| Dec | 1.5 in | 7 days | — | None |
Annual total: 22.4 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.
McHenry County Soil Profile
Soil Type
Loam
Soil pH
6.4-7.1
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 28 | Oct 6 | 131 days |
| Cautious | May 21 | Sep 30 | 132 days |
| Average year | May 17 | Sep 22 | 128 days |
| Optimistic | May 11 | Sep 19 | 131 days |
| Aggressive (risky) | Apr 30 | Sep 9 | 132 days |
Not very — frost dates can vary by ±27 days year-to-year. Use the "Conservative" row in the table below, and keep row covers handy for surprise late frosts.
Yes — growing seasons are getting longer here (about 2.3 days per decade). Spring is arriving earlier than it used to. Good news for gardeners.
Gardening Difficulty Score
McHenry County presents some gardening challenges. Choose adapted varieties and plan around frost dates.
Local Gardening Help in McHenry 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 McHenry County's climate and soil.
County Extension Office
McHenry County North Dakota State University Extension Extension Office
Phone: 701-231-8944
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 McHenry County
Finding local nurseries & garden centers in McHenry County
Why Buy Local
Local nurseries carry plants that are proven to grow in your area. Staff can give you advice specific to McHenry 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 McHenry County ND" or "garden center McHenry 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 McHenry County ND" or check your extension office and local parks department. Facebook groups like "McHenry County Gardeners" or "North Dakota 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 McHenry County
Monthly daylight hours and peak sun — critical for onion varieties, photoperiod-sensitive plants, and solar garden planning.
Why this matters: You can't change the sun. Picking the right day-length-matched varieties for McHenry County matters more than any other "fix" you make — and the seed packet tells you (look for "long-day," "short-day," "day-neutral").
Longest Day
15.8 hours
Summer solstice daylight
Shortest Day
8.2 hours
Winter solstice daylight
Peak Sun Hours
11.1 hr/day peak (summer)
Peak sun hours (green dashed line below) account for cloud cover — this is the usable direct sunlight your garden actually receives. Most vegetables need 6+ peak sun hours.
Onion tip: Your long summer days (14+ hours) support long-day onion varieties like Walla Walla, Sweet Spanish, and Ailsa Craig.
View detailed monthly data
| Month | Daylight Hours | Peak Sun Hours | Day Length |
|---|---|---|---|
| January | 8.6 hr | 4.7 hr | Short day |
| February | 10 hr | 5.5 hr | Short day |
| March | 11.6 hr | 6.7 hr | Short day |
| April | 13.4 hr | 8.7 hr | Neutral |
| May | 15 hr | 8.9 hr | Long day |
| June | 15.8 hr | 11 hr | Long day |
| July | 15.5 hr | 11.1 hr | Long day |
| August | 14.1 hr | 10 hr | Long day |
| September | 12.3 hr | 8.8 hr | Neutral |
| October | 10.5 hr | 7.1 hr | Short day |
| November | 9 hr | 5.2 hr | Short day |
| December | 8.2 hr | 4.4 hr | Short day |
Peak sun hours factor in typical cloud cover — use these for solar panel and shade-planning calculations.
Soil Temperature & Composting in McHenry County
Monthly soil temps tell you when to plant warm-season crops, and when your compost pile is actively working.
Why it matters: Lettuce germinates at 35°F. Beans want 60°F. Tomatoes 65°F+. Soil temp, not air temp, is what plants feel. McHenry County's monthly curve tells you when each crop actually has the conditions to take off.
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 | 7°F | 15°F | ❄️ Dormant | ~36 weeks |
| Feb | 7°F | 17°F | ❄️ Dormant | ~36 weeks |
| Mar | 18°F | 23°F | ❄️ Dormant | ~36 weeks |
| Apr | 35°F | 34°F | ❄️ Dormant | ~36 weeks |
| May | 52°F | 47°F | ♻️ Active | ~14 weeks |
| Jun | 61°F | 54°F | ♻️ Active | ~14 weeks |
| Jul | 68°F | 62°F | 🔥 Peak | ~8 weeks |
| Aug | 70°F | 64°F | 🔥 Peak | ~8 weeks |
| Sep | 62°F | 58°F | ♻️ Active | ~14 weeks |
| Oct | 45°F | 50°F | 🐢 Slow | ~24 weeks |
| Nov | 29°F | 38°F | ❄️ Dormant | ~36 weeks |
| Dec | 18°F | 27°F | ❄️ Dormant | ~36 weeks |
Highlighted rows = soil 60°F+ (safe for warm-season transplants). Compost finishes fastest during peak activity months.
Pest & Disease Pressure in McHenry County
Computed from local climate patterns — warmer, humid conditions increase pest generations and fungal disease risk.
Quick context: Warm humid regions cycle through pest generations 3-5x faster than cold dry regions. McHenry County's pest score is your early-warning system: high score means commit to disease-resistant varieties and accept some crop loss to bugs.
Insect Pest Pressure
Moderate — common pests appear but manageable with monitoring.
Disease Risk
Low disease risk — dry conditions reduce fungal problems.
Seasonal Risk
View 3 common pests in your area
| Pest | Risk Level | Peak Months |
|---|---|---|
| Aphids | Low | Jun, Jul, Aug |
| Cabbage worms | Moderate | Jun, Jul, Aug |
| Slugs | Moderate | May, Jun, Jul, Aug |
Organic pest management tips
- Maintain healthy soil with regular compost additions to build natural pest resistance
- Practice crop rotation annually to break pest cycles
- Encourage beneficial insects with flowering herbs like dill, fennel, and yarrow
Cover Crops for McHenry 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 protect microbial life through winter and summer. Bare soil bakes; covered soil stays cooler, moister, and biologically active. The difference shows up in next year's crops.
Spring Cover Crops (2 options) — Build soil before the main growing season
| Crop | Plant By | Terminate | N-Fixing | Soil Benefit |
|---|---|---|---|---|
| Buckwheat | May 23 | Jul 14 | — | Rapid growth, attracts pollinators, suppresses weeds |
| White clover | Apr 20 | Jul 21 | ✓ 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 5 | Aug 25 | — | 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 22 | Apr 26 | — | Quick biomass, winterkills in cold zones — no spring tillage needed |
| Winter rye | Jun 30 | May 3 | — | Suppresses weeds, prevents erosion, breaks up compacted soil |
| Winter wheat | Jun 14 | Apr 26 | — | Erosion control, weed suppression, good biomass |
Wind & Microclimate in McHenry County
For new gardeners: Pollinators avoid windy days. McHenry County's 11.0 mph average wind isn't enough to stop bees and butterflies — but plant fruiting crops (tomatoes, peppers, squash) in protected microclimates and you'll see noticeably better fruit set.
Wind dries soil, stresses plants, and affects frost patterns. Understanding your exposure helps with garden placement.
Seasonal Wind Speed
Spring: 16 mph Summer: 11 mph
Fall: 12 mph Winter: 17 mph
Prevailing wind: S. Windy area — plant a windbreak hedge on the S side of your garden.
Windbreak Benefit
6.6/10
Moderately beneficial — a simple fence or trellis can protect delicate crops from wind stress.
Frost Pocket Risk
Low
Relatively flat terrain (329 ft range). Frost pocket risk is minimal — garden placement is flexible.
Rainwater Harvesting in McHenry County
How much water you can collect, when to collect it, and what size system you need for your garden.
Quick context: A gravity-fed rain barrel ($75) is the easy entry. A larger cistern ($500-1500) covers a whole growing season. McHenry County's 22" annual rainfall determines whether the larger system is overkill or essential.
Annual Collection
11,164 gal
Per 1,000 sq ft of roof area (at 80% collection efficiency)
Recommended Setup
7 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, Aug, Sep
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 22.4 inches of rain per year
- A 1,000 sq ft roof can collect roughly 11,164 gallons annually
- Rainwater harvesting is fully legal in your state
- Stock up on stored water before your dry season (Feb, Nov, Dec)
- Use a first-flush diverter to keep roof debris out of your collection
Soil & Growing Conditions in McHenry County
Soil Type
Loam
Soil pH 6.4–7.1 · 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
128-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 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 McHenry County
95 vegetables that grow well in Zone 4a with planting dates for McHenry County.
Show all 95 vegetables with planting dates
| Plant | Start Indoors | Direct Sow | Transplant | Fall Plant | Harvest | Days to Maturity |
|---|---|---|---|---|---|---|
| Acorn Squash | Apr 5 | May 31 | Jun 7 | — | Aug 30 – Oct 4 | 80–100 |
| Amaranth | Mar 15 | May 31 | Jun 7 | — | Sep 6 – Oct 25 | 90–120 |
| Arugula | Apr 5 | May 10 | May 17 | Jun 30 | Jun 21 – Aug 23 | 30–50 |
| Asparagus | — | — | May 31 | — | — | 730–1095 |
| Beets | — | May 10 | — | Jun 30 | Jul 5 – Aug 2 | 50–70 |
| Belgian Endive | Apr 5 | May 10 | May 17 | Jun 30 | Sep 6 – Oct 11 | 110–150 |
| Black Beans | — | May 31 | — | — | Aug 30 – Oct 18 | 90–120 |
| Bok Choy | Apr 5 | May 10 | May 17 | Jun 30 | Jun 28 – Aug 2 | 40–60 |
| Broccoli | Apr 5 | May 10 | May 17 | Jun 30 | Jul 19 – Aug 30 | 60–90 |
| Broccoli Rabe | Apr 5 | May 10 | May 17 | Jun 30 | Jun 28 – Aug 2 | 40–60 |
| Brussels Sprouts | Apr 5 | May 10 | May 17 | Jun 30 | Aug 16 – Oct 11 | 90–130 |
| Butternut Squash | Apr 5 | May 31 | Jun 7 | — | Sep 6 – Oct 11 | 85–110 |
| Cabbage | Apr 5 | May 10 | May 17 | Jun 30 | Jul 19 – Sep 13 | 60–100 |
| Carrots | — | May 10 | — | Jun 30 | Jul 12 – Aug 16 | 60–80 |
| Cauliflower | Apr 5 | May 10 | May 17 | Jun 30 | Jul 12 – Sep 13 | 55–100 |
| Celeriac | Apr 5 | May 10 | May 17 | Jun 30 | Aug 30 – Oct 4 | 100–120 |
| Celery | Apr 5 | May 10 | May 17 | Jun 30 | Aug 9 – Oct 4 | 80–120 |
| Celtuce | Apr 5 | May 10 | May 17 | Jun 30 | Jul 19 – Aug 30 | 60–90 |
| Chard | Apr 5 | May 10 | May 17 | Jun 30 | Jul 12 – Aug 30 | 50–60 |
| Chickpeas | Apr 5 | May 10 | May 17 | Jun 30 | Aug 9 – Sep 20 | 80–110 |
| Chicory | Apr 5 | May 10 | May 17 | Jun 30 | Jul 19 – Aug 30 | 60–85 |
| Chinese Cabbage | Apr 5 | May 10 | May 17 | Jun 30 | Jul 12 – Aug 9 | 50–70 |
| Christmas Lima Beans | Mar 15 | May 31 | Jun 7 | — | Aug 30 – Oct 4 | 80–100 |
| Collard Greens | Apr 5 | May 10 | May 17 | Jun 30 | Jul 12 – Sep 13 | 55–75 |
| Corn | — | May 31 | — | — | Aug 2 – Sep 27 | 60–100 |
| Cress | Apr 5 | May 10 | May 17 | Jun 30 | May 31 – Jun 21 | 14–21 |
| Crookneck Squash | Apr 5 | May 31 | Jun 7 | — | Jul 26 – Aug 23 | 45–60 |
| Crosne | — | May 10 | — | Jun 30 | Oct 11 – Oct 4 | 150–200 |
| Cucumber | Apr 5 | May 31 | Jun 7 | — | Aug 2 – Sep 27 | 50–70 |
| Daikon | — | May 10 | — | Jun 30 | Jul 5 – Aug 2 | 50–70 |
| Delicata Squash | Apr 5 | May 31 | Jun 7 | — | Aug 30 – Oct 4 | 80–100 |
| Edamame | — | May 31 | — | — | Aug 16 – Sep 27 | 75–100 |
| Endive | Apr 5 | May 10 | May 17 | Jun 30 | Jul 5 – Aug 9 | 45–65 |
| Escarole | Apr 5 | May 10 | May 17 | Jun 30 | Jul 12 – Aug 9 | 50–70 |
| Fava Beans | Apr 5 | May 10 | May 17 | Jun 30 | Aug 2 – Sep 13 | 75–100 |
| Fennel | Mar 15 | May 31 | Jun 7 | — | Aug 9 – Sep 20 | 60–90 |
| Garlic | — | — | — | Aug 11 | Nov 10 – Jan 5 | 90–240 |
| Green Beans | — | May 31 | — | — | Jul 26 – Sep 20 | 50–65 |
| Horseradish | — | — | May 31 | — | Oct 4 – Oct 25 | 120–180 |
| Hubbard Squash | Apr 5 | May 31 | Jun 7 | — | Sep 20 – Oct 25 | 100–120 |
| Kabocha | Apr 5 | May 31 | Jun 7 | — | Sep 6 – Oct 4 | 85–100 |
| Kai Lan | Apr 5 | May 10 | May 17 | Jun 30 | Jul 5 – Aug 2 | 45–60 |
| Kale | Apr 5 | May 10 | May 17 | Jun 30 | Jul 12 – Sep 6 | 50–70 |
| Kidney Beans | — | May 31 | — | — | Aug 30 – Oct 4 | 85–110 |
| Kohlrabi | Apr 5 | May 10 | May 17 | Jun 30 | Jul 5 – Aug 9 | 45–65 |
| Komatsuna | Apr 5 | May 10 | May 17 | Jun 30 | Jun 21 – Jul 26 | 35–50 |
| Leeks | Apr 5 | May 10 | May 17 | Jun 30 | Aug 16 – Oct 11 | 90–150 |
| Lentils | Apr 5 | May 10 | May 17 | Jun 30 | Aug 9 – Sep 20 | 80–110 |
| Lettuce | Apr 5 | May 10 | May 17 | Jun 30 | Jun 21 – Aug 30 | 30–60 |
| Lima Beans | — | May 31 | — | — | Aug 2 – Sep 13 | 60–90 |
| Mache | Apr 5 | May 10 | May 17 | Jun 30 | Jun 28 – Aug 2 | 40–60 |
| Melon | Apr 5 | May 31 | Jun 7 | — | Aug 16 – Oct 4 | 70–100 |
| Microgreens | Apr 5 | May 10 | May 17 | Jun 30 | May 24 – Jun 21 | 7–21 |
| Mitsuba | Apr 5 | May 10 | May 10 | Jun 30 | Jul 5 – Aug 30 | 50–70 |
| Mizuna | Apr 5 | May 10 | May 17 | Jun 30 | Jun 21 – Jul 19 | 30–45 |
| Mustard Greens | Apr 5 | May 10 | May 17 | Jun 30 | Jun 21 – Aug 23 | 30–50 |
| Napa Cabbage | Apr 5 | May 10 | May 17 | Jun 30 | Jul 12 – Aug 16 | 55–75 |
| Onion | Apr 5 | May 10 | May 17 | Jun 30 | Aug 16 – Oct 4 | 90–120 |
| Pac Choi | Apr 5 | May 10 | May 17 | Jun 30 | Jun 28 – Jul 26 | 40–55 |
| Parsnip | — | May 10 | — | Jun 30 | Aug 23 – Oct 4 | 100–130 |
| Patty Pan Squash | Apr 5 | May 31 | Jun 7 | — | Jul 26 – Aug 23 | 45–60 |
| Peas | Apr 5 | May 10 | May 17 | Jun 30 | Jul 12 – Sep 6 | 55–70 |
| Peppers | Mar 1 | May 31 | Jun 7 | — | Aug 9 – Oct 18 | 60–90 |
| Pole Beans | Mar 15 | May 31 | Jun 7 | — | Aug 2 – Sep 27 | 55–70 |
| Potatoes | Mar 15 | May 31 | Jun 7 | — | Aug 16 – Oct 25 | 70–120 |
| Pumpkin | Apr 5 | May 31 | Jun 7 | — | Sep 6 – Oct 25 | 85–120 |
| Purslane | Apr 5 | May 10 | May 17 | Jun 30 | Jun 28 – Aug 2 | 40–60 |
| Radicchio | Apr 5 | May 10 | May 17 | Jun 30 | Jul 19 – Aug 23 | 60–80 |
| Radish | — | May 10 | — | Jun 30 | Jun 7 – Jun 28 | 22–35 |
| Rhubarb | — | — | Jun 14 | — | — | 365–730 |
| Romanesco | Apr 5 | May 10 | May 17 | Jun 30 | Aug 2 – Sep 13 | 75–100 |
| Rutabaga | — | May 10 | — | Jun 30 | Aug 2 – Sep 6 | 80–100 |
| Salsify | — | May 10 | — | Jun 30 | Aug 23 – Oct 4 | 100–130 |
| Savoy Cabbage | Apr 5 | May 10 | May 17 | Jun 30 | Jul 26 – Sep 20 | 70–110 |
| Scallions | Apr 5 | May 10 | May 17 | Jun 30 | Jul 12 – Aug 9 | 50–70 |
| Scarlet Runner Beans | Mar 15 | May 31 | Jun 7 | — | Aug 9 – Sep 13 | 60–80 |
| Shallot | Apr 5 | May 10 | May 17 | Jun 30 | Aug 16 – Oct 4 | 90–120 |
| Shiso | Mar 22 | May 24 | Jun 7 | — | Aug 2 – Sep 27 | 50–70 |
| Snap Peas | Mar 15 | May 31 | Jun 7 | — | Aug 2 – Sep 27 | 55–70 |
| Snow Peas | Apr 5 | May 10 | May 17 | Jun 30 | Jul 12 – Sep 6 | 50–65 |
| Soybeans | — | May 31 | — | — | Aug 23 – Oct 18 | 80–120 |
| Spaghetti Squash | Apr 5 | May 31 | Jun 7 | — | Sep 6 – Oct 4 | 85–100 |
| Spinach | Apr 5 | May 10 | May 17 | Jun 30 | Jun 21 – Aug 23 | 35–50 |
| Squash (Summer) | Apr 5 | May 31 | Jun 7 | — | Jul 26 – Sep 27 | 45–65 |
| Squash (Winter) | Apr 5 | May 31 | Jun 7 | — | Aug 30 – Oct 25 | 80–120 |
| Sunchoke | — | — | May 31 | — | Sep 20 – Oct 25 | 110–150 |
| Sweet Corn | — | May 31 | — | — | Aug 2 – Sep 13 | 60–90 |
| Tatsoi | Apr 5 | May 10 | May 17 | Jun 30 | Jun 21 – Jul 26 | 35–50 |
| Tomatillo | Mar 15 | May 31 | Jun 7 | — | Aug 9 – Oct 18 | 60–85 |
| Tomatoes | Mar 15 | May 31 | Jun 7 | — | Aug 9 – Oct 18 | 60–85 |
| Turnip | — | May 10 | — | Jun 30 | Jun 21 – Jul 26 | 40–60 |
| Watercress | Apr 5 | May 10 | May 17 | Jun 30 | Jun 28 – Aug 2 | 40–60 |
| Watermelon | Apr 5 | May 31 | Jun 7 | — | Aug 16 – Oct 4 | 70–100 |
| Wax Beans | — | May 31 | — | — | Jul 26 – Sep 20 | 50–65 |
| Zucchini | Apr 5 | May 31 | Jun 7 | — | Jul 26 – Sep 20 | 45–60 |
🍓 Fruits to Grow in McHenry County
22 fruits that grow well in Zone 4a with planting dates for McHenry County.
Show all 22 fruits with planting dates
| Plant | Start Indoors | Direct Sow | Transplant | Fall Plant | Harvest | Days to Maturity |
|---|---|---|---|---|---|---|
| Alpine Strawberries | — | — | Jun 14 | — | Sep 13 – Nov 8 | 90–180 |
| Aronia | — | — | Jun 14 | — | — | 730–1095 |
| Blueberries | — | — | Jun 14 | — | — | 730–1095 |
| Cantaloupe | — | — | Jun 14 | — | Aug 23 – Sep 27 | 70–90 |
| Cranberries | — | — | Jun 14 | — | — | 730–1095 |
| Currants | — | — | Jun 14 | — | — | 730–1095 |
| Elderberries | — | — | Jun 14 | — | — | 730–1095 |
| Goji Berries | — | — | Jun 14 | — | — | 730–1095 |
| Gooseberries | — | — | Jun 14 | — | — | 730–1095 |
| Grapes | — | — | Jun 14 | — | — | 730–1095 |
| Ground Cherry | — | — | Jun 14 | — | Aug 23 – Oct 18 | 65–80 |
| Hardy Kiwi | — | — | Jun 14 | — | — | 1095–1825 |
| Haskaps | — | — | Jun 14 | — | — | 730–1095 |
| Honeydew | — | — | Jun 14 | — | Sep 6 – Oct 18 | 80–110 |
| Jostaberry | — | — | Jun 14 | — | — | 730–1095 |
| Lingonberries | — | — | Jun 14 | — | — | 730–1095 |
| Medlar | — | — | Jun 14 | — | — | 1095–1825 |
| Mulberries | — | — | Jun 14 | — | — | 730–1825 |
| Persimmon | — | — | Jun 14 | — | — | 1095–2555 |
| Raspberries | — | — | Jun 14 | — | — | 365–730 |
| Serviceberries | — | — | Jun 14 | — | — | 730–1095 |
| Strawberries | — | — | Jun 14 | — | Sep 13 – Nov 8 | 90–365 |
🌿 Herbs to Grow in McHenry County
30 herbs that grow well in Zone 4a with planting dates for McHenry County.
Show all 30 herbs with planting dates
| Plant | Start Indoors | Direct Sow | Transplant | Fall Plant | Harvest | Days to Maturity |
|---|---|---|---|---|---|---|
| Angelica | Apr 5 | May 10 | May 10 | Jun 30 | — | 365–730 |
| Anise | Apr 5 | May 10 | May 10 | Jun 30 | Aug 9 – Oct 4 | 90–120 |
| Basil | Mar 22 | May 24 | Jun 7 | — | Aug 2 – Oct 4 | 50–75 |
| Bee Balm | — | — | May 24 | — | Aug 23 – Oct 18 | 90–120 |
| Borage | Apr 5 | May 10 | May 10 | Jun 30 | Jul 5 – Aug 23 | 50–60 |
| Caraway | Apr 5 | May 10 | May 10 | Jun 30 | — | 365–450 |
| Catnip | — | — | May 24 | — | Jul 26 – Sep 27 | 60–80 |
| Chamomile | Apr 5 | May 10 | May 10 | Jun 30 | Jul 12 – Sep 20 | 60–90 |
| Chervil | Apr 5 | May 10 | May 10 | Jun 30 | Jun 21 – Aug 23 | 40–60 |
| Chives | — | — | May 24 | — | Jul 26 – Oct 4 | 60–90 |
| Cilantro | Apr 5 | May 10 | May 10 | Jun 30 | Jun 21 – Aug 23 | 40–60 |
| Comfrey | — | — | May 24 | — | Jul 26 – Oct 4 | 60–90 |
| Dill | Apr 5 | May 10 | May 10 | Jun 30 | Jun 21 – Aug 23 | 40–60 |
| Fennel (herb) | Apr 5 | May 10 | May 10 | Jun 30 | Jul 12 – Sep 20 | 60–90 |
| Garlic Chives | — | — | May 24 | — | Jul 26 – Oct 4 | 60–90 |
| Horehound | — | — | May 24 | — | Aug 9 – Oct 4 | 75–90 |
| Hyssop | — | — | May 24 | — | Aug 2 – Oct 4 | 70–90 |
| Lemon Balm | — | — | May 24 | — | Jul 26 – Sep 13 | 60–70 |
| Lovage | — | — | May 24 | — | Aug 2 – Oct 4 | 70–90 |
| Mint | — | — | May 24 | — | Jul 26 – Oct 4 | 60–90 |
| Oregano | — | — | May 24 | — | Jul 26 – Oct 4 | 60–90 |
| Parsley | Apr 5 | May 10 | May 10 | Jun 30 | Jul 12 – Sep 13 | 60–80 |
| Rue | — | — | May 24 | — | Aug 2 – Oct 4 | 70–90 |
| Sage | — | — | May 24 | — | Aug 9 – Oct 4 | 75–90 |
| Savory | — | — | May 24 | — | Jul 19 – Sep 13 | 50–70 |
| Sorrel | Apr 5 | May 10 | May 10 | Jun 30 | Jun 21 – Aug 23 | 40–60 |
| Tarragon | — | — | May 24 | — | Jul 26 – Oct 4 | 60–90 |
| Thai Basil | Mar 22 | May 24 | Jun 7 | — | Aug 2 – Oct 4 | 50–75 |
| Thyme | — | — | May 24 | — | Aug 2 – Oct 4 | 70–90 |
| Valerian | — | — | May 24 | — | Sep 27 – Oct 18 | 120–180 |
🌸 Flowers to Grow in McHenry County
49 flowers that grow well in Zone 4a with planting dates for McHenry County.
Show all 49 flowers with planting dates
| Plant | Start Indoors | Direct Sow | Transplant | Fall Plant | Bloom | Days to Maturity |
|---|---|---|---|---|---|---|
| Ageratum | Mar 22 | May 24 | May 24 | — | Jul 19 – Sep 27 | 60–75 |
| Alliums | — | — | — | Aug 11 | Sep 22 – Oct 13 | 28–42 |
| Astilbe | Mar 8 | — | May 31 | — | Aug 23 – Oct 18 | 70–100 |
| Bachelor's Button | Mar 29 | May 3 | May 17 | — | Jul 19 – Sep 20 | 60–90 |
| Begonias | Mar 1 | — | May 31 | — | Aug 9 – Oct 11 | 70–90 |
| Black-eyed Susan | Mar 8 | May 17 | May 31 | — | Aug 23 – Nov 1 | 60–80 |
| Bleeding Hearts | Mar 8 | — | May 31 | — | Jul 26 – Sep 6 | 60–90 |
| Calendula | Mar 29 | May 3 | May 17 | — | Jul 5 – Sep 20 | 50–70 |
| Celosia | Apr 5 | May 31 | May 31 | — | Aug 2 – Oct 18 | 60–90 |
| Columbine | Mar 8 | May 31 | May 31 | — | Jul 26 – Sep 6 | 70–100 |
| Coreopsis | Mar 8 | May 24 | May 31 | — | Aug 16 – Nov 1 | 60–80 |
| Cosmos | Apr 19 | May 24 | May 24 | — | Aug 2 – Oct 18 | 60–90 |
| Crocus | — | — | — | Aug 11 | Jun 16 – Jul 7 | 10–20 |
| Daffodils | — | — | — | Aug 11 | Jun 23 – Jul 14 | 20–40 |
| Dahlias | Apr 19 | May 31 | May 31 | — | Aug 30 – Nov 1 | 70–120 |
| Daylily | Mar 8 | — | May 31 | — | Aug 30 – Nov 1 | 60–90 |
| Dianthus | Mar 15 | Apr 26 | May 10 | — | Jun 28 – Aug 30 | 60–80 |
| Echinacea (Purple Coneflower) | Mar 8 | May 31 | May 31 | — | Aug 30 – Nov 1 | 70–90 |
| Foxglove | Mar 8 | May 31 | May 31 | — | Jul 26 – Sep 6 | 80–120 |
| Gaillardia (Blanket Flower) | Mar 22 | May 31 | May 31 | — | Aug 9 – Nov 8 | 70–100 |
| Geraniums | Mar 1 | — | May 31 | — | Aug 9 – Oct 11 | 70–100 |
| Gladiolus | — | May 24 | May 24 | — | Aug 23 – Oct 25 | 70–100 |
| Hostas | Mar 1 | — | May 31 | — | Aug 30 – Nov 1 | 60–90 |
| Hyacinths | — | — | — | Aug 11 | Jul 14 – Aug 4 | 14–28 |
| Hydrangeas | Mar 1 | — | May 31 | — | Aug 23 – Oct 18 | 90–150 |
| Impatiens | Mar 15 | — | May 31 | — | Aug 16 – Oct 11 | 60–75 |
| Irises | — | Division | May 31 | — | Jul 26 – Aug 23 | 60–100 |
| Larkspur | — | Apr 12 | — | — | Jun 21 – Aug 2 | 60–90 |
| Lilies | — | Division | May 31 | — | Aug 23 – Oct 25 | 70–120 |
| Lobelia | Mar 8 | — | May 17 | — | Jul 12 – Sep 6 | 70–80 |
| Lupine | Mar 8 | May 31 | May 31 | — | Jul 26 – Sep 6 | 75–100 |
| Marigolds | Apr 5 | May 31 | May 31 | — | Jul 26 – Oct 11 | 50–70 |
| Nasturtium | Apr 19 | May 31 | May 31 | — | Jul 26 – Oct 11 | 55–65 |
| Pansy | Mar 1 | — | May 17 | — | Jul 12 – Aug 30 | 70–90 |
| Peonies | — | Division | May 31 | — | Aug 9 – Sep 13 | 90–120 |
| Petunia | Mar 15 | — | May 31 | — | Aug 16 – Oct 18 | 70–90 |
| Phlox | Mar 8 | May 31 | May 31 | — | Aug 23 – Oct 25 | 80–110 |
| Portulaca | Apr 5 | May 31 | May 31 | — | Jul 19 – Sep 27 | 50–70 |
| Roses | Mar 1 | — | May 31 | — | Aug 23 – Nov 1 | 90–180 |
| Salvia | Mar 8 | — | May 31 | — | Aug 9 – Oct 11 | 70–90 |
| Sedum (Stonecrop) | Mar 8 | — | May 31 | — | Oct 4 – Nov 22 | 60–90 |
| Snapdragon | Mar 1 | — | May 17 | — | Jul 26 – Sep 20 | 70–100 |
| Sunflower | Apr 26 | May 31 | May 31 | — | Aug 23 – Oct 18 | 70–100 |
| Sweet Alyssum | Mar 22 | May 10 | May 17 | — | Jun 28 – Aug 30 | 45–60 |
| Sweet Pea | Mar 29 | Apr 12 | May 17 | — | Aug 9 – Sep 20 | 65–85 |
| Tulips | — | — | — | Aug 11 | Jul 7 – Jul 28 | 15–30 |
| Vinca (Annual) | Mar 1 | — | May 31 | — | Aug 9 – Oct 11 | 70–90 |
| Yarrow | Mar 8 | May 17 | May 31 | — | Aug 16 – Nov 1 | 60–90 |
| Zinnia | Apr 19 | May 31 | May 31 | — | Aug 9 – Oct 18 | 60–70 |
Monthly Planting Guide for McHenry County
Gardening Guides & Resources
Helpful guides from The Ultimate Homestead to improve your garden in McHenry County.
Frequently Asked Questions
What planting zone is McHenry County, ND?
McHenry 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 McHenry County, ND?
Based on 31 years of NOAA weather station data, the median last spring frost in McHenry County falls around May 17. In 8 out of 10 years, last frost lands between April 30 and May 28 — a 27-day window of variability. Use May 28 as your conservative safe-to-plant date for frost-sensitive crops.
When is the first fall frost in McHenry County, ND?
The median first fall frost in McHenry County arrives around September 22. In cold years it can arrive as early as September 9; in mild years as late as October 6. Harvest or protect frost-sensitive crops — tomatoes, peppers, basil, squash — before this date.
How long is the growing season in McHenry County?
McHenry County has a frost-free growing season of approximately 128 days. Focus on short-season varieties and start warm-season crops indoors 6–8 weeks before last frost. Climate records show the growing season is trending longer by about 2.33 days per decade.
What is the soil like in McHenry County for gardening?
McHenry County has predominantly Loam soil with a pH range of 6.4–7.1 and Well Drained drainage. Most vegetables and herbs grow well with standard composting and seasonal soil amendment.
What is grown commercially in McHenry County?
McHenry County has commercial agriculture that includes Wheat, Corn, Soybeans, Hay, Cattle. These crops reflect the local climate and soil conditions — what succeeds commercially often translates well to home gardens in the same area.
Is McHenry County a good location for home gardening?
McHenry County scores 50/100 (Moderate) on our Microclimate Index, which combines frost reliability, drought pressure, soil challenge, elevation risk, and long-term climate trend. Conditions here are moderate — most common crops grow well with standard timing and care.
Your McHenry County Garden Planner — Free
A 22-page printable planner built for McHenry 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