Vilas County, WI — Planting Guide
Your June gardening checklist
A quick June briefing for Vilas County, Wisconsin gardeners — what's urgent, what's next, and what can wait.
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Plant out basil, cucumber, and peppers
Harden off for 7 days — a little more sun each day — before planting. That's the difference between a seedling that thrives and one that stalls.
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Seed cucumber, green beans, and peppers outdoors
Your soil is 64°F — warm enough for these to germinate without babying.
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Indoor seed-starting week for cosmos, dahlias, and nasturtium
Bottom-water once the first true leaves appear — it keeps stems dry and knocks back damping-off.
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Start harvesting lettuce, radish, and arugula
This is the payoff month. Bring a basket, bring a friend, and get into the beds.
Before July arrives, get these ready
- Starting indoors: basil, cucumber, and kale
- First harvests: carrots, green beans, and kale
- Fall sowing: carrots, kale, and lettuce
Vilas County is in USDA Zone 4a. The average last spring frost is May 21 and the first fall frost is September 29, giving you a growing season of approximately 131 days.
At an elevation of 543 ft, Vilas County receives approximately 36.5 in of rainfall annually. Summer highs average 84°F with winter lows around 9°F. The predominant soil type is Silt Loam.
Based on 31 years of NOAA climate station data, the last frost date here varies by 22 days year to year — ranging from May 10 in warm years to June 2 in cold years. The growing season is trending longer by about 0.89 days per decade. Vilas County scores 74/100 (Good) on the Microclimate Index.
🌡️ Zone
4a (-30°F to -25°F min)
❄️ Last Frost
May 21
🍂 First Frost
September 29
📅 Growing Season
131 days
⛰️ Elevation
543 ft
🌧️ Annual Rainfall
36.5 in
Monthly Watering Calendar for Vilas County
When you'll need to water your garden — based on average monthly rainfall vs. the ~1 inch/week most gardens need.
For new gardeners: Mulch reduces watering needs 30-50% by cutting evaporation. Vilas County's 37" annual rainfall might be enough for vegetables in some months and not in others — a 2-3" mulch layer evens the swing.
View detailed monthly data
| Month | Avg Rainfall | Rainy Days | Extra Water Needed | Watering Effort |
|---|---|---|---|---|
| Jan | 1.3 in | 9 days | — | None |
| Feb | 1.7 in | 6 days | — | None |
| Mar | 2.6 in | 9 days | — | None |
| Apr | 3.6 in | 10 days | 0.7 in | Moderate |
| May | 4.3 in | 11 days | — | Low |
| Jun | 4.3 in | 9 days | — | Low |
| Jul | 4.2 in | 9 days | 0.1 in | Low |
| Aug | 4.4 in | 9 days | — | Low |
| Sep | 2.9 in | 8 days | 1.4 in | Moderate |
| Oct | 2.9 in | 8 days | 1.4 in | Moderate |
| Nov | 2.2 in | 8 days | — | None |
| Dec | 2.1 in | 6 days | — | None |
Annual total: 36.5 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.
Vilas County Soil Profile
Soil Type
Silt Loam
Soil pH
5.8-7.3
Drainage
Well Drained
Frost Risk Probability
Based on 31 years of NOAA weather station data from 3 stations
Beginners: Plant frost-sensitive crops (tomatoes, peppers, squash) after the "Safe" date on the left. Harvest or cover them before the "Protect by" date on the right. Hardy crops (lettuce, peas, kale) can go in the yellow transition zones.
How to read this table: "Conservative" means you're safe from frost 9 out of 10 years — best for beginners and frost-sensitive crops. "Average year" is the typical date. "Aggressive" means only 1 in 10 years is that warm — experienced gardeners with frost protection can try these dates.
| Planting Strategy | Last Spring Frost | First Fall Frost | Frost-Free Days |
|---|---|---|---|
| Conservative (safest) | Jun 2 | Oct 9 | 129 days |
| Cautious | May 28 | Oct 2 | 127 days |
| Average year | May 21 | Sep 29 | 131 days |
| Optimistic | May 17 | Sep 21 | 127 days |
| Aggressive (risky) | May 10 | Sep 13 | 126 days |
Not very — frost dates can vary by ±22 days year-to-year. Use the "Conservative" row in the table below, and keep row covers handy for surprise late frosts.
Slightly — seasons are trending a bit longer (0.9 days/decade). Historical frost dates are still reliable for planning.
Gardening Difficulty Score
Vilas County offers good growing conditions. A little planning around frost dates goes a long way.
Local Gardening Help in Vilas 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 Vilas County's climate and soil.
County Extension Office
Vilas 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 Vilas County
Finding local nurseries & garden centers in Vilas County
Why Buy Local
Local nurseries carry plants that are proven to grow in your area. Staff can give you advice specific to Vilas 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 Vilas County WI" or "garden center Vilas 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 Vilas County WI" or check your extension office and local parks department. Facebook groups like "Vilas 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 in Vilas County
Monthly daylight hours and peak sun — critical for onion varieties, photoperiod-sensitive plants, and solar garden planning.
What this means for you: Lettuce and cilantro "bolt" (go to seed) when days lengthen. Knowing your day-length curve helps you time spring plantings to harvest before the bolting trigger hits. Vilas County's daylight ranges shape the planting calendar.
Longest Day
15.5 hours
Summer solstice daylight
Shortest Day
8.5 hours
Winter solstice daylight
Peak Sun Hours
9.9 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 | 4.6 hr | Short day |
| March | 11.6 hr | 5.7 hr | Short day |
| April | 13.3 hr | 6.7 hr | Neutral |
| May | 14.8 hr | 8.6 hr | Long day |
| June | 15.5 hr | 9.8 hr | Long day |
| July | 15.2 hr | 9.9 hr | Long day |
| August | 14 hr | 8.7 hr | Long day |
| September | 12.3 hr | 7.1 hr | Neutral |
| October | 10.7 hr | 5.7 hr | Short day |
| November | 9.2 hr | 3.6 hr | Short day |
| December | 8.5 hr | 3.2 hr | Short day |
Peak sun hours factor in typical cloud cover — use these for solar panel and shade-planning calculations.
Soil Temperature & Composting in Vilas County
Monthly soil temps tell you when to plant warm-season crops, and when your compost pile is actively working.
For new gardeners: Compost piles need 130-160°F internal temp to actively break down. Below 50°F ambient, microbial activity slows dramatically. Vilas County's soil temperature curve also tells you when your compost is working and when it's napping.
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 | 13°F | 25°F | ❄️ Dormant | ~36 weeks |
| Feb | 17°F | 22°F | ❄️ Dormant | ~36 weeks |
| Mar | 26°F | 29°F | ❄️ Dormant | ~36 weeks |
| Apr | 41°F | 39°F | 🐢 Slow | ~24 weeks |
| May | 54°F | 51°F | ♻️ Active | ~14 weeks |
| Jun | 64°F | 59°F | ♻️ Active | ~14 weeks |
| Jul | 73°F | 66°F | 🔥 Peak | ~8 weeks |
| Aug | 75°F | 69°F | 🔥 Peak | ~8 weeks |
| Sep | 64°F | 64°F | ♻️ Active | ~14 weeks |
| Oct | 52°F | 56°F | ♻️ Active | ~14 weeks |
| Nov | 35°F | 44°F | ❄️ Dormant | ~36 weeks |
| Dec | 23°F | 30°F | ❄️ Dormant | ~36 weeks |
Highlighted rows = soil 60°F+ (safe for warm-season transplants). Compost finishes fastest during peak activity months.
Pest & Disease Pressure in Vilas County
Computed from local climate patterns — warmer, humid conditions increase pest generations and fungal disease risk.
What this means for you: The most successful gardeners in high-pressure regions don't spray more — they design around the problem. Crop rotation, companion planting, and resistant varieties beat reactive spraying.
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 | Low | Jun, Jul, Aug |
| Colorado potato beetle | Moderate | Jun, Jul |
| Flea beetles | Moderate | May, Jun, Jul |
| Slugs | Moderate | 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 Vilas County
Cover crops protect bare soil, fix nitrogen, suppress weeds, and improve soil structure — with planting dates calibrated for your area.
What this means for you: 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 27 | Jul 21 | — | Rapid growth, attracts pollinators, suppresses weeds |
| White clover | Apr 26 | Aug 4 | ✓ 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 17 | Sep 15 | — | 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 18 | Apr 30 | — | Deep taproot breaks compaction, excellent for clay soils |
| Hairy vetch | Jul 5 | Apr 30 | ✓ Yes | Excellent nitrogen fixer, good for depleted soils |
| Oats | Sep 1 | Apr 30 | — | Quick biomass, winterkills in cold zones — no spring tillage needed |
| Winter rye | Jun 20 | May 7 | — | Suppresses weeds, prevents erosion, breaks up compacted soil |
| Winter wheat | Jun 24 | Apr 30 | — | Erosion control, weed suppression, good biomass |
Wind & Microclimate in Vilas County
What this means for you: Wind dries soil, knocks over young transplants, and disrupts pollination for bees and butterflies. Vilas County averages 9.9 mph — above 10 mph means windbreaks (shrubs, fences, taller crops to windward), staked tomatoes from day one, and an extra round of watering during dry windy spells. Lower wind = lower water bills and fewer broken stems.
Wind dries soil, stresses plants, and affects frost patterns. Understanding your exposure helps with garden placement.
Seasonal Wind Speed
Spring: 11 mph Summer: 10 mph
Fall: 11 mph Winter: 11 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 (240 ft range). Frost pocket risk is minimal — garden placement is flexible.
Rainwater Harvesting in Vilas County
How much water you can collect, when to collect it, and what size system you need for your garden.
Why it matters: A gravity-fed rain barrel ($75) is the easy entry. A larger cistern ($500-1500) covers a whole growing season. Vilas County's 37" annual rainfall determines whether the larger system is overkill or essential.
Annual Collection
18,191 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
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 36.5 inches of rain per year
- A 1,000 sq ft roof can collect roughly 18,191 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 Vilas County
Soil Type
Silt Loam
Soil pH 5.8–7.3 · Well Drained drainage
Native soil is well-suited to most vegetables and herbs with regular compost additions.
Watering Needs
Drought stress: 3.5/10
Low-to-moderate drought stress. Plan to water 1–2 times per week during peak summer. (36.5 in. annual rainfall)
Season Tips
131-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.
Monthly Planting Guide for Vilas County
Gardening Guides & Resources
Helpful guides from The Ultimate Homestead to improve your garden in Vilas County.
Frequently Asked Questions
What planting zone is Vilas County, WI?
Vilas 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 Vilas County, WI?
Based on 31 years of NOAA weather station data, the median last spring frost in Vilas County falls around May 21. In 8 out of 10 years, last frost lands between May 10 and June 2 — a 22-day window of variability. Use June 2 as your conservative safe-to-plant date for frost-sensitive crops.
When is the first fall frost in Vilas County, WI?
The median first fall frost in Vilas County arrives around September 29. In cold years it can arrive as early as September 13; in mild years as late as October 9. Harvest or protect frost-sensitive crops — tomatoes, peppers, basil, squash — before this date.
How long is the growing season in Vilas County?
Vilas County has a frost-free growing season of approximately 131 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 0.89 days per decade.
What is the soil like in Vilas County for gardening?
Vilas County has predominantly Silt Loam soil with a pH range of 5.8–7.3 and Well Drained drainage. Most vegetables and herbs grow well with standard composting and seasonal soil amendment.
What is grown commercially in Vilas County?
Vilas County has commercial agriculture that includes Corn, Soybeans, Hay. These crops reflect the local climate and soil conditions — what succeeds commercially often translates well to home gardens in the same area.
Is Vilas County a good location for home gardening?
Vilas County scores 74/100 (Good) on our Microclimate Index, which combines frost reliability, drought pressure, soil challenge, elevation risk, and long-term climate trend. This is an above-average location for home gardening with relatively predictable growing conditions.
Your Vilas County Garden Planner — Free
A 22-page printable planner built for Vilas 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