Oconto County, WI — Planting Guide
May to-do list for Oconto County, Wisconsin
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.
-
Set out basil, cucumber, and kale seedlings
Water the tray well an hour before you transplant. Roots slide out cleanly and settle in faster.
-
Plant basil, cucumber, and green beans from seed, right in the garden
Rake a smooth bed, make a shallow furrow, drop seeds at the spacing on the packet, water gently, walk away.
-
Basket week: radish, cress, and microgreens
This is the payoff month. Bring a basket, bring a friend, and get into the beds.
Looking ahead to June
- Starting indoors: basil, cucumber, and kale
- First harvests: carrots, lettuce, and radish
Oconto County is in USDA Zone 5a. The average last spring frost is May 9 and the first fall frost is October 4, giving you a growing season of approximately 148 days.
At an elevation of 794 ft, Oconto County receives approximately 37.6 in of rainfall annually. Summer highs average 80°F with winter lows around 8°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 25 in warm years to May 26 in cold years. The growing season is trending longer by about 1.24 days per decade. Oconto County scores 66/100 (Good) on the Microclimate Index.
🌡️ Zone
5a (°F to °F min)
❄️ Last Frost
May 9
🍂 First Frost
October 4
📅 Growing Season
148 days
⛰️ Elevation
794 ft
🌧️ Annual Rainfall
37.6 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 | 1.6 in | 8 days | — | None |
| Feb | 1.9 in | 7 days | — | None |
| Mar | 2.4 in | 9 days | — | None |
| Apr | 3.3 in | 10 days | 1 in | Moderate |
| May | 4.1 in | 11 days | 0.2 in | Low |
| Jun | 4.7 in | 11 days | — | Low |
| Jul | 4.6 in | 7 days | — | Low |
| Aug | 4.1 in | 9 days | 0.2 in | Low |
| Sep | 3.3 in | 8 days | 1 in | Moderate |
| Oct | 2.7 in | 7 days | 1.6 in | High |
| Nov | 2.8 in | 7 days | — | None |
| Dec | 2 in | 8 days | — | None |
Annual total: 37.5 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.
Oconto County Soil Profile
Soil Type
Silt Loam
Soil pH
6-7
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 26 | Oct 20 | 147 days |
| Cautious | May 16 | Oct 11 | 148 days |
| Average year | May 9 | Oct 4 | 148 days |
| Optimistic | May 3 | Sep 29 | 149 days |
| Aggressive (risky) | Apr 25 | Sep 20 | 148 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 1.2 days per decade). Spring is arriving earlier than it used to. Good news for gardeners.
Gardening Difficulty Score
Oconto County offers good growing conditions. A little planning around frost dates goes a long way.
Local Gardening Help in Oconto 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 Oconto County's climate and soil.
County Extension Office
Oconto County University of Wisconsin-Madison Division of Extension Extension Office
Phone: 608-263-7779
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 Oconto County
Finding local nurseries & garden centers in Oconto County
Why Buy Local
Local nurseries carry plants that are proven to grow in your area. Staff can give you advice specific to Oconto 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 Oconto County WI" or "garden center Oconto 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 Oconto County WI" or check your extension office and local parks department. Facebook groups like "Oconto County Gardeners" or "Wisconsin 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
15.4 hours
Summer solstice daylight
Shortest Day
8.6 hours
Winter solstice daylight
Peak Sun Hours
9.7 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 | 8.9 hr | 3.6 hr | Short day |
| February | 10.2 hr | 4.5 hr | Short day |
| March | 11.6 hr | 5.8 hr | Short day |
| April | 13.3 hr | 7 hr | Neutral |
| May | 14.7 hr | 8.3 hr | Long day |
| June | 15.4 hr | 9.7 hr | Long day |
| July | 15.1 hr | 9.5 hr | Long day |
| August | 13.9 hr | 8.6 hr | Neutral |
| September | 12.3 hr | 7 hr | Neutral |
| October | 10.7 hr | 5.7 hr | Short day |
| November | 9.3 hr | 3.7 hr | Short day |
| December | 8.6 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
6 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 | 24°F | ❄️ Dormant | ~36 weeks |
| Feb | 18°F | 23°F | ❄️ Dormant | ~36 weeks |
| Mar | 25°F | 29°F | ❄️ Dormant | ~36 weeks |
| Apr | 40°F | 40°F | ❄️ Dormant | ~36 weeks |
| May | 54°F | 51°F | ♻️ Active | ~14 weeks |
| Jun | 65°F | 61°F | ♻️ Active | ~14 weeks |
| Jul | 74°F | 65°F | 🔥 Peak | ~8 weeks |
| Aug | 74°F | 69°F | 🔥 Peak | ~8 weeks |
| Sep | 66°F | 65°F | 🔥 Peak | ~8 weeks |
| Oct | 51°F | 54°F | ♻️ Active | ~14 weeks |
| Nov | 38°F | 43°F | ❄️ Dormant | ~36 weeks |
| Dec | 22°F | 32°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 Oconto 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
Moderate — watch for mildew and blight during wet periods.
Seasonal Risk
View 5 common pests in your area
| Pest | Risk Level | Peak Months |
|---|---|---|
| Aphids | Moderate | May, Jun, Jul, Aug |
| Cabbage worms | Moderate | Jun, Jul, Aug |
| Colorado potato beetle | Low | Jun, Jul |
| Flea beetles | Moderate | May, Jun, Jul |
| Slugs | Low | May, Jun, Jul, Aug, Sep |
Organic pest management tips
- Use row covers on susceptible crops during peak pest months
- Apply neem oil preventatively every 7-14 days during active pest season
- Interplant with strong-scented herbs (basil, marigold) to confuse pests
- Hand-pick larger pests (beetles, caterpillars) in early morning when they're sluggish
- Practice crop rotation — never plant the same family in the same spot within 3 years
Cover Crops for Oconto 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 22 | Aug 9 | — | Rapid growth, attracts pollinators, suppresses weeds |
| White clover | Apr 14 | Jul 26 | ✓ 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 4 | Sep 20 | — | 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 8 | Apr 18 | — | Deep taproot breaks compaction, excellent for clay soils |
| Hairy vetch | Jul 10 | Apr 25 | ✓ Yes | Excellent nitrogen fixer, good for depleted soils |
| Oats | Aug 20 | Apr 18 | — | Quick biomass, winterkills in cold zones — no spring tillage needed |
| Winter rye | Jun 29 | Apr 18 | — | Suppresses weeds, prevents erosion, breaks up compacted soil |
| Winter wheat | Jun 30 | Apr 25 | — | 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: 12 mph Summer: 9 mph
Fall: 11 mph Winter: 12 mph
Prevailing wind: SW. Moderate wind — consider a temporary windbreak for young seedlings.
Windbreak Benefit
6.7/10
Moderately beneficial — a simple fence or trellis can protect delicate crops from wind stress.
Frost Pocket Risk
Low
Relatively flat terrain (230 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
18,690 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 1,500 gal tank.
Legal Status
Unrestricted
Rainwater harvesting is fully legal in your state with no restrictions.
Best Collection Months
May, Jun, Jul, Aug
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 37.5 inches of rain per year
- A 1,000 sq ft roof can collect roughly 18,690 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 Oconto County
Soil Type
Silt Loam
Soil pH 6–7 · 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
148-day frost-free season
Start warm-season crops indoors and focus on short-season varieties. Cold frames extend your season by 3–4 weeks in fall.
Your Free Printable Garden Planner
Plan every bed, every planting, every harvest — in one place. This 24-page printable includes your zone's planting calendar, a month-by-month task list, a seed inventory tracker, a harvest log, and succession-planting charts. Built to print, write in, and actually use all season.
Recommended for Your Garden
Test your soil pH, nitrogen, phosphorus, and potassium levels before planting.
Get instant, accurate soil pH readings to fine-tune your amendments.
Boost soil fertility and structure with rich, well-aged organic compost.
🥬 Vegetables to Grow in Oconto County
106 vegetables that grow well in Zone 5a with planting dates for Oconto County.
Show all 106 vegetables with planting dates
| Plant | Start Indoors | Direct Sow | Transplant | Harvest | Days to Maturity |
|---|---|---|---|---|---|
| Acorn Squash | Apr 4 | May 16 | May 23 | Aug 15 – Sep 19 | 80–100 |
| Amaranth | Mar 14 | May 16 | May 23 | Aug 22 – Oct 10 | 90–120 |
| Arugula | Apr 4 | Apr 25 | May 9 | Jun 13 – Aug 15 | 30–50 |
| Asparagus | — | — | May 23 | — | 730–1095 |
| Beets | — | Apr 25 | — | Jun 20 – Jul 18 | 50–70 |
| Belgian Endive | Apr 4 | Apr 25 | May 9 | Aug 29 – Oct 24 | 110–150 |
| Bitter Melon | Mar 14 | May 16 | May 23 | Jul 25 – Sep 5 | 60–90 |
| Black Beans | — | May 16 | — | Aug 15 – Oct 3 | 90–120 |
| Bok Choy | Apr 4 | Apr 25 | May 9 | Jun 20 – Jul 25 | 40–60 |
| Broccoli | Apr 4 | Apr 25 | May 9 | Jul 11 – Aug 22 | 60–90 |
| Broccoli Rabe | Apr 4 | Apr 25 | May 9 | Jun 20 – Jul 25 | 40–60 |
| Brussels Sprouts | Apr 4 | Apr 25 | May 9 | Aug 8 – Oct 3 | 90–130 |
| Butternut Squash | Apr 4 | May 16 | May 23 | Aug 22 – Sep 26 | 85–110 |
| Cabbage | Apr 4 | Apr 25 | May 9 | Jul 11 – Sep 5 | 60–100 |
| Calabash | Mar 14 | May 16 | May 23 | Aug 15 – Oct 10 | 80–120 |
| Carrots | — | Apr 25 | — | Jun 27 – Aug 1 | 60–80 |
| Cauliflower | Apr 4 | Apr 25 | May 9 | Jul 4 – Sep 5 | 55–100 |
| Celeriac | Apr 4 | Apr 25 | May 9 | Aug 22 – Sep 26 | 100–120 |
| Celery | Apr 4 | Apr 25 | May 9 | Aug 1 – Sep 26 | 80–120 |
| Celtuce | Apr 4 | Apr 25 | May 9 | Jul 11 – Aug 22 | 60–90 |
| Chard | Apr 4 | Apr 25 | May 9 | Jul 4 – Aug 22 | 50–60 |
| Chickpeas | Apr 4 | Apr 25 | May 9 | Aug 1 – Sep 12 | 80–110 |
| Chicory | Apr 4 | Apr 25 | May 9 | Jul 11 – Aug 22 | 60–85 |
| Chinese Cabbage | Apr 4 | Apr 25 | May 9 | Jul 4 – Aug 1 | 50–70 |
| Christmas Lima Beans | Mar 14 | May 16 | May 23 | Aug 15 – Sep 19 | 80–100 |
| Collard Greens | Apr 4 | Apr 25 | May 9 | Jul 4 – Sep 5 | 55–75 |
| Corn | — | May 16 | — | Jul 18 – Sep 12 | 60–100 |
| Cowpeas | — | May 16 | — | Jul 18 – Aug 29 | 60–90 |
| Cress | Apr 4 | Apr 25 | May 9 | May 23 – Jun 13 | 14–21 |
| Crookneck Squash | Apr 4 | May 16 | May 23 | Jul 11 – Aug 8 | 45–60 |
| Crosne | — | Apr 25 | — | Sep 26 – Oct 10 | 150–200 |
| Cucumber | Apr 4 | May 16 | May 23 | Jul 18 – Sep 12 | 50–70 |
| Daikon | — | Apr 25 | — | Jun 20 – Jul 18 | 50–70 |
| Delicata Squash | Apr 4 | May 16 | May 23 | Aug 15 – Sep 19 | 80–100 |
| Edamame | — | May 16 | — | Aug 1 – Sep 12 | 75–100 |
| Eggplant | Feb 28 | May 16 | May 23 | Aug 1 – Oct 3 | 65–85 |
| Endive | Apr 4 | Apr 25 | May 9 | Jun 27 – Aug 1 | 45–65 |
| Escarole | Apr 4 | Apr 25 | May 9 | Jul 4 – Aug 1 | 50–70 |
| Fava Beans | Apr 4 | Apr 25 | May 9 | Jul 25 – Sep 5 | 75–100 |
| Fennel | Mar 14 | May 16 | May 23 | Jul 25 – Sep 5 | 60–90 |
| Garlic | — | — | — | — | 90–240 |
| Green Beans | — | May 16 | — | Jul 11 – Sep 5 | 50–65 |
| Horseradish | — | — | May 23 | Sep 26 – Nov 7 | 120–180 |
| Hot Peppers | Feb 28 | May 16 | May 23 | Aug 1 – Nov 7 | 70–120 |
| Hubbard Squash | Apr 4 | May 16 | May 23 | Sep 5 – Oct 10 | 100–120 |
| Kabocha | Apr 4 | May 16 | May 23 | Aug 22 – Sep 19 | 85–100 |
| Kai Lan | Apr 4 | Apr 25 | May 9 | Jun 27 – Jul 25 | 45–60 |
| Kale | Apr 4 | Apr 25 | May 9 | Jul 4 – Aug 29 | 50–70 |
| Kidney Beans | — | May 16 | — | Aug 15 – Sep 19 | 85–110 |
| Kohlrabi | Apr 4 | Apr 25 | May 9 | Jun 27 – Aug 1 | 45–65 |
| Komatsuna | Apr 4 | Apr 25 | May 9 | Jun 13 – Jul 18 | 35–50 |
| Leeks | Apr 4 | Apr 25 | May 9 | Aug 8 – Oct 24 | 90–150 |
| Lentils | Apr 4 | Apr 25 | May 9 | Aug 1 – Sep 12 | 80–110 |
| Lettuce | Apr 4 | Apr 25 | May 9 | Jun 13 – Aug 22 | 30–60 |
| Lima Beans | — | May 16 | — | Jul 18 – Aug 29 | 60–90 |
| Mache | Apr 4 | Apr 25 | May 9 | Jun 20 – Jul 25 | 40–60 |
| Melon | Apr 4 | May 16 | May 23 | Aug 1 – Sep 19 | 70–100 |
| Microgreens | Apr 4 | Apr 25 | May 9 | May 16 – Jun 13 | 7–21 |
| Mitsuba | Apr 4 | Apr 25 | May 2 | Jun 27 – Aug 22 | 50–70 |
| Mizuna | Apr 4 | Apr 25 | May 9 | Jun 13 – Jul 11 | 30–45 |
| Mustard Greens | Apr 4 | Apr 25 | May 9 | Jun 13 – Aug 15 | 30–50 |
| Napa Cabbage | Apr 4 | Apr 25 | May 9 | Jul 4 – Aug 8 | 55–75 |
| New Zealand Spinach | Mar 14 | May 16 | May 23 | Jul 18 – Aug 15 | 55–70 |
| Okra | Mar 14 | May 16 | May 23 | Jul 18 – Sep 12 | 50–65 |
| Onion | Apr 4 | Apr 25 | May 9 | Aug 8 – Sep 26 | 90–120 |
| Pac Choi | Apr 4 | Apr 25 | May 9 | Jun 20 – Jul 18 | 40–55 |
| Parsnip | — | Apr 25 | — | Aug 8 – Sep 19 | 100–130 |
| Patty Pan Squash | Apr 4 | May 16 | May 23 | Jul 11 – Aug 8 | 45–60 |
| Peas | Apr 4 | Apr 25 | May 9 | Jul 4 – Aug 29 | 55–70 |
| Peppers | Feb 28 | May 16 | May 23 | Jul 25 – Oct 3 | 60–90 |
| Pole Beans | Mar 14 | May 16 | May 23 | Jul 18 – Sep 12 | 55–70 |
| Potatoes | Mar 14 | May 16 | May 23 | Aug 1 – Oct 10 | 70–120 |
| Pumpkin | Apr 4 | May 16 | May 23 | Aug 22 – Oct 10 | 85–120 |
| Purslane | Apr 4 | Apr 25 | May 9 | Jun 20 – Jul 25 | 40–60 |
| Radicchio | Apr 4 | Apr 25 | May 9 | Jul 11 – Aug 15 | 60–80 |
| Radish | — | Apr 25 | — | May 23 – Jun 13 | 22–35 |
| Rhubarb | — | — | May 30 | — | 365–730 |
| Romanesco | Apr 4 | Apr 25 | May 9 | Jul 25 – Sep 5 | 75–100 |
| Rutabaga | — | Apr 25 | — | Jul 18 – Aug 22 | 80–100 |
| Salsify | — | Apr 25 | — | Aug 8 – Sep 19 | 100–130 |
| Savoy Cabbage | Apr 4 | Apr 25 | May 9 | Jul 18 – Sep 12 | 70–110 |
| Scallions | Apr 4 | Apr 25 | May 9 | Jul 4 – Aug 1 | 50–70 |
| Scarlet Runner Beans | Mar 14 | May 16 | May 23 | Jul 25 – Aug 29 | 60–80 |
| Shallot | Apr 4 | Apr 25 | May 9 | Aug 8 – Sep 26 | 90–120 |
| Shiso | Mar 21 | May 16 | May 23 | Jul 18 – Sep 12 | 50–70 |
| Snap Peas | Mar 14 | May 16 | May 23 | Jul 18 – Sep 12 | 55–70 |
| Snow Peas | Apr 4 | Apr 25 | May 9 | Jul 4 – Aug 29 | 50–65 |
| Soybeans | — | May 16 | — | Aug 8 – Oct 3 | 80–120 |
| Spaghetti Squash | Apr 4 | May 16 | May 23 | Aug 22 – Sep 19 | 85–100 |
| Spinach | Apr 4 | Apr 25 | May 9 | Jun 13 – Aug 15 | 35–50 |
| Squash (Summer) | Apr 4 | May 16 | May 23 | Jul 11 – Sep 12 | 45–65 |
| Squash (Winter) | Apr 4 | May 16 | May 23 | Aug 15 – Oct 10 | 80–120 |
| Sunchoke | — | — | May 23 | Sep 12 – Nov 7 | 110–150 |
| Sunflower | Mar 14 | May 16 | May 23 | Aug 1 – Sep 19 | 70–100 |
| Sweet Corn | — | May 16 | — | Jul 18 – Aug 29 | 60–90 |
| Sweet Potatoes | Mar 14 | May 16 | May 23 | Aug 22 – Oct 10 | 90–120 |
| Tatsoi | Apr 4 | Apr 25 | May 9 | Jun 13 – Jul 18 | 35–50 |
| Tomatillo | Mar 14 | May 16 | May 23 | Jul 25 – Oct 3 | 60–85 |
| Tomatoes | Mar 14 | May 16 | May 23 | Jul 25 – Oct 3 | 60–85 |
| Turnip | — | Apr 25 | — | Jun 6 – Jul 11 | 40–60 |
| Watercress | Apr 4 | Apr 25 | May 9 | Jun 20 – Jul 25 | 40–60 |
| Watermelon | Apr 4 | May 16 | May 23 | Aug 1 – Sep 19 | 70–100 |
| Wax Beans | — | May 16 | — | Jul 11 – Sep 5 | 50–65 |
| Winter Melon | Mar 14 | May 16 | May 23 | Aug 22 – Oct 10 | 90–120 |
| Yard Long Beans | Mar 14 | May 16 | May 23 | Jul 18 – Aug 29 | 55–80 |
| Zucchini | Apr 4 | May 16 | May 23 | Jul 11 – Sep 5 | 45–60 |
🍓 Fruits to Grow in Oconto County
27 fruits that grow well in Zone 5a with planting dates for Oconto County.
Show all 27 fruits with planting dates
| Plant | Start Indoors | Direct Sow | Transplant | Harvest | Days to Maturity |
|---|---|---|---|---|---|
| Alpine Strawberries | — | — | May 30 | Aug 29 – Nov 14 | 90–180 |
| Aronia | — | — | May 30 | — | 730–1095 |
| Blackberries | — | — | May 30 | — | 365–730 |
| Blueberries | — | — | May 30 | — | 730–1095 |
| Boysenberries | — | — | May 30 | — | 365–730 |
| Cantaloupe | — | — | May 30 | Aug 8 – Sep 12 | 70–90 |
| Che Fruit | — | — | May 30 | — | 1095–1825 |
| Cranberries | — | — | May 30 | — | 730–1095 |
| Currants | — | — | May 30 | — | 730–1095 |
| Elderberries | — | — | May 30 | — | 730–1095 |
| Goji Berries | — | — | May 30 | — | 730–1095 |
| Gooseberries | — | — | May 30 | — | 730–1095 |
| Grapes | — | — | May 30 | — | 730–1095 |
| Ground Cherry | — | — | May 30 | Aug 8 – Oct 3 | 65–80 |
| Hardy Kiwi | — | — | May 30 | — | 1095–1825 |
| Haskaps | — | — | May 30 | — | 730–1095 |
| Honeydew | — | — | May 30 | Aug 22 – Oct 3 | 80–110 |
| Jostaberry | — | — | May 30 | — | 730–1095 |
| Lingonberries | — | — | May 30 | — | 730–1095 |
| Medlar | — | — | May 30 | — | 1095–1825 |
| Mulberries | — | — | May 30 | — | 730–1825 |
| Pawpaw | — | — | May 30 | — | 1095–2555 |
| Persimmon | — | — | May 30 | — | 1095–2555 |
| Quince | — | — | May 30 | — | 1095–1825 |
| Raspberries | — | — | May 30 | — | 365–730 |
| Serviceberries | — | — | May 30 | — | 730–1095 |
| Strawberries | — | — | May 30 | Aug 29 – Nov 14 | 90–365 |
🌿 Herbs to Grow in Oconto County
37 herbs that grow well in Zone 5a with planting dates for Oconto County.
Show all 37 herbs with planting dates
| Plant | Start Indoors | Direct Sow | Transplant | Harvest | Days to Maturity |
|---|---|---|---|---|---|
| Angelica | Apr 4 | Apr 25 | May 2 | — | 365–730 |
| Anise | Apr 4 | Apr 25 | May 2 | Aug 1 – Oct 17 | 90–120 |
| Basil | Mar 21 | May 16 | May 23 | Jul 18 – Sep 19 | 50–75 |
| Bee Balm | — | — | May 16 | Aug 15 – Oct 31 | 90–120 |
| Borage | Apr 4 | Apr 25 | May 2 | Jun 27 – Aug 15 | 50–60 |
| Caraway | Apr 4 | Apr 25 | May 2 | — | 365–450 |
| Catnip | — | — | May 16 | Jul 18 – Sep 19 | 60–80 |
| Chamomile | Apr 4 | Apr 25 | May 2 | Jul 4 – Sep 12 | 60–90 |
| Chervil | Apr 4 | Apr 25 | May 2 | Jun 13 – Aug 15 | 40–60 |
| Chives | — | — | May 16 | Jul 18 – Sep 26 | 60–90 |
| Cilantro | Apr 4 | Apr 25 | May 2 | Jun 13 – Aug 15 | 40–60 |
| Comfrey | — | — | May 16 | Jul 18 – Sep 26 | 60–90 |
| Cumin | Apr 4 | Apr 25 | May 2 | Aug 15 – Oct 17 | 100–120 |
| Dill | Apr 4 | Apr 25 | May 2 | Jun 13 – Aug 15 | 40–60 |
| Echinacea | — | — | May 16 | Sep 19 – Oct 31 | 120–180 |
| Epazote | Mar 21 | May 16 | May 23 | Jul 11 – Sep 5 | 45–60 |
| Fennel (herb) | Apr 4 | Apr 25 | May 2 | Jul 4 – Sep 12 | 60–90 |
| Feverfew | — | — | May 16 | Aug 15 – Oct 31 | 90–120 |
| 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 |
| Lavender | — | — | May 16 | Aug 15 – Oct 31 | 90–200 |
| Lemon Balm | — | — | May 16 | Jul 18 – Sep 5 | 60–70 |
| Lemon Thyme | — | — | May 16 | Jul 25 – Sep 26 | 70–90 |
| 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 | Apr 4 | Apr 25 | May 2 | 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 | Apr 4 | Apr 25 | May 2 | Jun 13 – Aug 15 | 40–60 |
| Tarragon | — | — | May 16 | Jul 18 – Sep 26 | 60–90 |
| Thai Basil | Mar 21 | May 16 | May 23 | Jul 18 – Sep 19 | 50–75 |
| Thyme | — | — | May 16 | Jul 25 – Sep 26 | 70–90 |
| Valerian | — | — | May 16 | Sep 19 – Oct 31 | 120–180 |
| Yarrow | — | — | May 16 | Aug 15 – Oct 31 | 90–120 |
Monthly Planting Guide for Oconto County
Gardening Guides & Resources
Helpful guides from The Ultimate Homestead to improve your garden in Oconto County.
Frequently Asked Questions
What planting zone is Oconto County, WI?
Oconto County is in USDA Hardiness Zone 5a. 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 Oconto County, WI?
Based on 31 years of NOAA weather station data, the median last spring frost in Oconto County falls around May 9. In 8 out of 10 years, last frost lands between April 25 and May 26 — a 30-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 Oconto County, WI?
The median first fall frost in Oconto County arrives around October 4. In cold years it can arrive as early as September 20; in mild years as late as October 20. Harvest or protect frost-sensitive crops — tomatoes, peppers, basil, squash — before this date.
How long is the growing season in Oconto County?
Oconto County has a frost-free growing season of approximately 148 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 1.24 days per decade.
What is the soil like in Oconto County for gardening?
Oconto County has predominantly Silt Loam soil with a pH range of 6–7 and Well Drained drainage. Most vegetables and herbs grow well with standard composting and seasonal soil amendment.
What is grown commercially in Oconto County?
Oconto County has commercial agriculture that includes Corn, Soybeans, Hay, Dairy, Oats. These crops reflect the local climate and soil conditions — what succeeds commercially often translates well to home gardens in the same area.
Is Oconto County a good location for home gardening?
Oconto 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 Oconto County Garden Planner — Free
A 24-page printable planner built for Oconto County (Zone 5a). 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