Summit County, UT — Planting Guide
Summit County is in USDA Zone 5a. The average last spring frost is June 10 and the first fall frost is September 12, giving you a growing season of approximately 94 days.
At an elevation of 8,145 ft, Summit County receives approximately 24.8 in of rainfall annually. Summer highs average 86°F with winter lows around 14°F. The predominant soil type is Loam.
Based on 31 years of NOAA climate station data, the last frost date here varies by 38 days year to year — ranging from May 13 in warm years to June 21 in cold years. The growing season is trending shorter by about 0.67 days per decade. Summit County scores 45/100 (Moderate) on the Microclimate Index.
🌡️ Zone
5a (-20°F to -15°F min)
❄️ Last Frost
June 10
🍂 First Frost
September 12
📅 Growing Season
94 days
⛰️ Elevation
8,145 ft
🌧️ Annual Rainfall
24.8 in
Monthly Watering Calendar
When you'll need to water your garden — based on average monthly rainfall vs. the ~1 inch/week most gardens need.
View detailed monthly data
| Month | Avg Rainfall | Rainy Days | Extra Water Needed | Watering Effort |
|---|---|---|---|---|
| Jan | 1.6 in | 7 days | — | None |
| Feb | 1.3 in | 5 days | — | None |
| Mar | 2.4 in | 9 days | — | None |
| Apr | 2.9 in | 7 days | 1.4 in | Moderate |
| May | 2.9 in | 8 days | 1.4 in | Moderate |
| Jun | 1.8 in | 5 days | 2.5 in | High |
| Jul | 1.9 in | 6 days | 2.4 in | High |
| Aug | 2.5 in | 6 days | 1.8 in | High |
| Sep | 2 in | 6 days | 2.3 in | High |
| Oct | 2.1 in | 6 days | 2.2 in | High |
| Nov | 2 in | 6 days | — | None |
| Dec | 1.4 in | 7 days | — | None |
Annual total: 24.8 in. Water needs vary by crop — tomatoes need ~1.2"/week while herbs like rosemary need only 0.3"/week. Check individual plant pages for crop-specific water budgets that factor in your county's rainfall and soil drainage.
Summit County Soil Profile
Soil Type
Loam
Soil pH
6.4-8.3
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 21 | Sep 30 | 101 days |
| Cautious | Jun 17 | Sep 18 | 93 days |
| Average year | Jun 10 | Sep 12 | 94 days |
| Optimistic | May 30 | Aug 31 | 93 days |
| Aggressive (risky) | May 13 | Aug 23 | 102 days |
Not very — frost dates can vary by ±38 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 shorter (0.7 days/decade). Stay conservative with planting dates.
Gardening Difficulty Score
Summit County presents some gardening challenges. Choose adapted varieties and plan around frost dates.
Local Gardening Help in Summit 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 Summit County's climate and soil.
County Extension Office
Summit County Utah State University Extension Extension Office
Phone: 435-797-2200
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 Summit County
Finding local nurseries & garden centers in Summit County
Why Buy Local
Local nurseries carry plants that are proven to grow in your area. Staff can give you advice specific to Summit 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 Summit County UT" or "garden center Summit 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 Summit County UT" or check your extension office and local parks department. Facebook groups like "Summit County Gardeners" or "Utah 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.
Sunlight & Day Length
Monthly daylight hours and peak sun — critical for onion varieties, photoperiod-sensitive plants, and solar garden planning.
Longest Day
14.9 hours
Summer solstice daylight
Shortest Day
9.1 hours
Winter solstice daylight
Peak Sun Hours
11.2 hr/day peak (summer)
Peak sun hours (green dashed line below) account for cloud cover — this is the usable direct sunlight your garden actually receives. Most vegetables need 6+ peak sun hours.
Onion tip: Your long summer days (14+ hours) support long-day onion varieties like Walla Walla, Sweet Spanish, and Ailsa Craig.
View detailed monthly data
| Month | Daylight Hours | Peak Sun Hours | Day Length |
|---|---|---|---|
| January | 9.4 hr | 5.1 hr | Short day |
| February | 10.4 hr | 6.3 hr | Short day |
| March | 11.7 hr | 6.8 hr | Short day |
| April | 13.1 hr | 7.4 hr | Neutral |
| May | 14.3 hr | 9.1 hr | Long day |
| June | 14.9 hr | 11.2 hr | Long day |
| July | 14.7 hr | 10.6 hr | Long day |
| August | 13.6 hr | 9 hr | Neutral |
| September | 12.3 hr | 8.6 hr | Neutral |
| October | 10.9 hr | 7.1 hr | Short day |
| November | 9.7 hr | 5.7 hr | Short day |
| December | 9.1 hr | 5.2 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 rarely reaches 60°F — use black plastic mulch to warm soil.
Best Month to Compost
Jul
Microbial activity peaks when soil is warm.
Active Composting
2 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 | -3°F | 7°F | ❄️ Dormant | ~36 weeks |
| Feb | -2°F | 4°F | ❄️ Dormant | ~36 weeks |
| Mar | 8°F | 11°F | ❄️ Dormant | ~36 weeks |
| Apr | 22°F | 19°F | ❄️ Dormant | ~36 weeks |
| May | 33°F | 30°F | ❄️ Dormant | ~36 weeks |
| Jun | 45°F | 40°F | 🐢 Slow | ~24 weeks |
| Jul | 50°F | 47°F | ♻️ Active | ~14 weeks |
| Aug | 53°F | 48°F | ♻️ Active | ~14 weeks |
| Sep | 46°F | 45°F | 🐢 Slow | ~24 weeks |
| Oct | 32°F | 37°F | ❄️ Dormant | ~36 weeks |
| Nov | 20°F | 25°F | ❄️ Dormant | ~36 weeks |
| Dec | 5°F | 14°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 Summit County
Computed from local climate patterns — warmer, humid conditions increase pest generations and fungal disease risk.
Insect Pest Pressure
Moderate — common pests appear but manageable with monitoring.
Disease Risk
Low disease risk — dry conditions reduce fungal problems.
Seasonal Risk
View 5 common pests in your area
| Pest | Risk Level | Peak Months |
|---|---|---|
| Aphids | Moderate | May, Jun, Jul, Aug |
| Japanese beetles | Moderate | Jun, Jul, Aug |
| Squash bugs | Moderate | Jun, Jul, Aug |
| Tomato hornworms | Moderate | Jul, Aug |
| Cabbage loopers | 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 Summit County
Cover crops protect bare soil, fix nitrogen, suppress weeds, and improve soil structure — with county-specific planting dates.
Spring Cover Crops (3 options) — Build soil before the main growing season
| Crop | Plant By | Terminate | N-Fixing | Soil Benefit |
|---|---|---|---|---|
| Buckwheat | Jun 20 | Jul 4 | — | Rapid growth, attracts pollinators, suppresses weeds |
| Sorghum-sudan grass | Jun 19 | Jul 18 | — | Massive biomass, breaks compaction, suppresses nematodes |
| White clover | May 10 | Jul 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 | Jul 11 | Aug 22 | — | Deep roots break compaction, attract pollinators and beneficial insects |
Fall Cover Crops (6 options) — Plant after harvest to protect soil over winter
| Crop | Plant By | Terminate | N-Fixing | Soil Benefit |
|---|---|---|---|---|
| Austrian winter peas | Jul 7 | May 27 | ✓ Yes | Fixes nitrogen, good for heavy clay soils |
| Daikon radish | Jul 24 | May 20 | — | Deep taproot breaks compaction, excellent for clay soils |
| Hairy vetch | Jul 6 | May 20 | ✓ Yes | Excellent nitrogen fixer, good for depleted soils |
| Oats | Aug 14 | May 27 | — | Quick biomass, winterkills in cold zones — no spring tillage needed |
| Winter rye | Jun 19 | May 27 | — | Suppresses weeds, prevents erosion, breaks up compacted soil |
| Winter wheat | Jun 23 | May 20 | — | 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: 14 mph Summer: 12 mph
Fall: 11 mph Winter: 14 mph
Prevailing wind: W. Windy area — plant a windbreak hedge on the W side of your garden.
Windbreak Benefit
7.3/10
Strongly recommended — a windbreak (fence, hedge, or row of tall crops like corn or sunflowers) will significantly improve garden yields.
Frost Pocket Risk
High
Hilly terrain with 2,956 ft of elevation range — cold air pools in low spots. Avoid planting frost-sensitive crops in valleys.
Rainwater Harvesting Potential
How much water you can collect, when to collect it, and what size system you need for your garden.
Annual Collection
12,360 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
Limited
Your state has quantity limits on rainwater collection — check local regulations before installing large systems.
Best Collection Months
Mar, Apr, May, 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 24.8 inches of rain per year
- A 1,000 sq ft roof can collect roughly 12,360 gallons annually
- Check UT state regulations — rainwater harvesting has quantity limits
- 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 Summit County
Soil Type
Loam
Soil pH 6.4–8.3 · Moderately 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
94-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.
Free Garden Planner
Plan your entire garden season — organize planting dates, track what you're growing, and know exactly when to start seeds, transplant, and harvest.
Recommended for Your Garden
Test your soil pH, nitrogen, phosphorus, and potassium levels before planting.
Get instant, accurate soil pH readings to fine-tune your amendments.
Boost soil fertility and structure with rich, well-aged organic compost.
🥬 Vegetables to Grow in Summit County
106 vegetables that grow well in Zone 5a with planting dates for Summit County.
Show all 106 vegetables with planting dates
| Plant | Start Indoors | Direct Sow | Transplant | Harvest | Days to Maturity |
|---|---|---|---|---|---|
| Acorn Squash | May 6 | Jun 17 | Jun 24 | Sep 16 – Oct 21 | 80–100 |
| Amaranth | Apr 15 | Jun 17 | Jun 24 | Sep 23 – Nov 11 | 90–120 |
| Arugula | May 6 | May 27 | Jun 10 | Jul 15 – Sep 16 | 30–50 |
| Asparagus | — | — | Jun 24 | — | 730–1095 |
| Beets | — | May 27 | — | Jul 22 – Aug 19 | 50–70 |
| Belgian Endive | May 6 | May 27 | Jun 10 | Sep 30 – Nov 25 | 110–150 |
| Bitter Melon | Apr 15 | Jun 17 | Jun 24 | Aug 26 – Oct 7 | 60–90 |
| Black Beans | — | Jun 17 | — | Sep 16 – Nov 4 | 90–120 |
| Bok Choy | May 6 | May 27 | Jun 10 | Jul 22 – Aug 26 | 40–60 |
| Broccoli | May 6 | May 27 | Jun 10 | Aug 12 – Sep 23 | 60–90 |
| Broccoli Rabe | May 6 | May 27 | Jun 10 | Jul 22 – Aug 26 | 40–60 |
| Brussels Sprouts | May 6 | May 27 | Jun 10 | Sep 9 – Nov 4 | 90–130 |
| Butternut Squash | May 6 | Jun 17 | Jun 24 | Sep 23 – Oct 28 | 85–110 |
| Cabbage | May 6 | May 27 | Jun 10 | Aug 12 – Oct 7 | 60–100 |
| Calabash | Apr 15 | Jun 17 | Jun 24 | Sep 16 – Nov 11 | 80–120 |
| Carrots | — | May 27 | — | Jul 29 – Sep 2 | 60–80 |
| Cauliflower | May 6 | May 27 | Jun 10 | Aug 5 – Oct 7 | 55–100 |
| Celeriac | May 6 | May 27 | Jun 10 | Sep 23 – Oct 28 | 100–120 |
| Celery | May 6 | May 27 | Jun 10 | Sep 2 – Oct 28 | 80–120 |
| Celtuce | May 6 | May 27 | Jun 10 | Aug 12 – Sep 23 | 60–90 |
| Chard | May 6 | May 27 | Jun 10 | Aug 5 – Sep 23 | 50–60 |
| Chickpeas | May 6 | May 27 | Jun 10 | Sep 2 – Oct 14 | 80–110 |
| Chicory | May 6 | May 27 | Jun 10 | Aug 12 – Sep 23 | 60–85 |
| Chinese Cabbage | May 6 | May 27 | Jun 10 | Aug 5 – Sep 2 | 50–70 |
| Christmas Lima Beans | Apr 15 | Jun 17 | Jun 24 | Sep 16 – Oct 21 | 80–100 |
| Collard Greens | May 6 | May 27 | Jun 10 | Aug 5 – Oct 7 | 55–75 |
| Corn | — | Jun 17 | — | Aug 19 – Oct 14 | 60–100 |
| Cowpeas | — | Jun 17 | — | Aug 19 – Sep 30 | 60–90 |
| Cress | May 6 | May 27 | Jun 10 | Jun 24 – Jul 15 | 14–21 |
| Crookneck Squash | May 6 | Jun 17 | Jun 24 | Aug 12 – Sep 9 | 45–60 |
| Crosne | — | May 27 | — | Oct 28 – Nov 11 | 150–200 |
| Cucumber | May 6 | Jun 17 | Jun 24 | Aug 19 – Oct 14 | 50–70 |
| Daikon | — | May 27 | — | Jul 22 – Aug 19 | 50–70 |
| Delicata Squash | May 6 | Jun 17 | Jun 24 | Sep 16 – Oct 21 | 80–100 |
| Edamame | — | Jun 17 | — | Sep 2 – Oct 14 | 75–100 |
| Eggplant | Apr 1 | Jun 17 | Jun 24 | Sep 2 – Nov 4 | 65–85 |
| Endive | May 6 | May 27 | Jun 10 | Jul 29 – Sep 2 | 45–65 |
| Escarole | May 6 | May 27 | Jun 10 | Aug 5 – Sep 2 | 50–70 |
| Fava Beans | May 6 | May 27 | Jun 10 | Aug 26 – Oct 7 | 75–100 |
| Fennel | Apr 15 | Jun 17 | Jun 24 | Aug 26 – Oct 7 | 60–90 |
| Garlic | — | — | — | — | 90–240 |
| Green Beans | — | Jun 17 | — | Aug 12 – Oct 7 | 50–65 |
| Horseradish | — | — | Jun 24 | Oct 28 – Dec 9 | 120–180 |
| Hot Peppers | Apr 1 | Jun 17 | Jun 24 | Sep 2 – Dec 9 | 70–120 |
| Hubbard Squash | May 6 | Jun 17 | Jun 24 | Oct 7 – Nov 11 | 100–120 |
| Kabocha | May 6 | Jun 17 | Jun 24 | Sep 23 – Oct 21 | 85–100 |
| Kai Lan | May 6 | May 27 | Jun 10 | Jul 29 – Aug 26 | 45–60 |
| Kale | May 6 | May 27 | Jun 10 | Aug 5 – Sep 30 | 50–70 |
| Kidney Beans | — | Jun 17 | — | Sep 16 – Oct 21 | 85–110 |
| Kohlrabi | May 6 | May 27 | Jun 10 | Jul 29 – Sep 2 | 45–65 |
| Komatsuna | May 6 | May 27 | Jun 10 | Jul 15 – Aug 19 | 35–50 |
| Leeks | May 6 | May 27 | Jun 10 | Sep 9 – Nov 25 | 90–150 |
| Lentils | May 6 | May 27 | Jun 10 | Sep 2 – Oct 14 | 80–110 |
| Lettuce | May 6 | May 27 | Jun 10 | Jul 15 – Sep 23 | 30–60 |
| Lima Beans | — | Jun 17 | — | Aug 19 – Sep 30 | 60–90 |
| Mache | May 6 | May 27 | Jun 10 | Jul 22 – Aug 26 | 40–60 |
| Melon | May 6 | Jun 17 | Jun 24 | Sep 2 – Oct 21 | 70–100 |
| Microgreens | May 6 | May 27 | Jun 10 | Jun 17 – Jul 15 | 7–21 |
| Mitsuba | May 6 | May 27 | Jun 3 | Jul 29 – Sep 23 | 50–70 |
| Mizuna | May 6 | May 27 | Jun 10 | Jul 15 – Aug 12 | 30–45 |
| Mustard Greens | May 6 | May 27 | Jun 10 | Jul 15 – Sep 16 | 30–50 |
| Napa Cabbage | May 6 | May 27 | Jun 10 | Aug 5 – Sep 9 | 55–75 |
| New Zealand Spinach | Apr 15 | Jun 17 | Jun 24 | Aug 19 – Sep 16 | 55–70 |
| Okra | Apr 15 | Jun 17 | Jun 24 | Aug 19 – Oct 14 | 50–65 |
| Onion | May 6 | May 27 | Jun 10 | Sep 9 – Oct 28 | 90–120 |
| Pac Choi | May 6 | May 27 | Jun 10 | Jul 22 – Aug 19 | 40–55 |
| Parsnip | — | May 27 | — | Sep 9 – Oct 21 | 100–130 |
| Patty Pan Squash | May 6 | Jun 17 | Jun 24 | Aug 12 – Sep 9 | 45–60 |
| Peas | May 6 | May 27 | Jun 10 | Aug 5 – Sep 30 | 55–70 |
| Peppers | Apr 1 | Jun 17 | Jun 24 | Aug 26 – Nov 4 | 60–90 |
| Pole Beans | Apr 15 | Jun 17 | Jun 24 | Aug 19 – Oct 14 | 55–70 |
| Potatoes | Apr 15 | Jun 17 | Jun 24 | Sep 2 – Nov 11 | 70–120 |
| Pumpkin | May 6 | Jun 17 | Jun 24 | Sep 23 – Nov 11 | 85–120 |
| Purslane | May 6 | May 27 | Jun 10 | Jul 22 – Aug 26 | 40–60 |
| Radicchio | May 6 | May 27 | Jun 10 | Aug 12 – Sep 16 | 60–80 |
| Radish | — | May 27 | — | Jun 24 – Jul 15 | 22–35 |
| Rhubarb | — | — | Jul 1 | — | 365–730 |
| Romanesco | May 6 | May 27 | Jun 10 | Aug 26 – Oct 7 | 75–100 |
| Rutabaga | — | May 27 | — | Aug 19 – Sep 23 | 80–100 |
| Salsify | — | May 27 | — | Sep 9 – Oct 21 | 100–130 |
| Savoy Cabbage | May 6 | May 27 | Jun 10 | Aug 19 – Oct 14 | 70–110 |
| Scallions | May 6 | May 27 | Jun 10 | Aug 5 – Sep 2 | 50–70 |
| Scarlet Runner Beans | Apr 15 | Jun 17 | Jun 24 | Aug 26 – Sep 30 | 60–80 |
| Shallot | May 6 | May 27 | Jun 10 | Sep 9 – Oct 28 | 90–120 |
| Shiso | Apr 22 | Jun 17 | Jun 24 | Aug 19 – Oct 14 | 50–70 |
| Snap Peas | Apr 15 | Jun 17 | Jun 24 | Aug 19 – Oct 14 | 55–70 |
| Snow Peas | May 6 | May 27 | Jun 10 | Aug 5 – Sep 30 | 50–65 |
| Soybeans | — | Jun 17 | — | Sep 9 – Nov 4 | 80–120 |
| Spaghetti Squash | May 6 | Jun 17 | Jun 24 | Sep 23 – Oct 21 | 85–100 |
| Spinach | May 6 | May 27 | Jun 10 | Jul 15 – Sep 16 | 35–50 |
| Squash (Summer) | May 6 | Jun 17 | Jun 24 | Aug 12 – Oct 14 | 45–65 |
| Squash (Winter) | May 6 | Jun 17 | Jun 24 | Sep 16 – Nov 11 | 80–120 |
| Sunchoke | — | — | Jun 24 | Oct 14 – Dec 9 | 110–150 |
| Sunflower | Apr 15 | Jun 17 | Jun 24 | Sep 2 – Oct 21 | 70–100 |
| Sweet Corn | — | Jun 17 | — | Aug 19 – Sep 30 | 60–90 |
| Sweet Potatoes | Apr 15 | Jun 17 | Jun 24 | Sep 23 – Nov 11 | 90–120 |
| Tatsoi | May 6 | May 27 | Jun 10 | Jul 15 – Aug 19 | 35–50 |
| Tomatillo | Apr 15 | Jun 17 | Jun 24 | Aug 26 – Nov 4 | 60–85 |
| Tomatoes | Apr 15 | Jun 17 | Jun 24 | Aug 26 – Nov 4 | 60–85 |
| Turnip | — | May 27 | — | Jul 8 – Aug 12 | 40–60 |
| Watercress | May 6 | May 27 | Jun 10 | Jul 22 – Aug 26 | 40–60 |
| Watermelon | May 6 | Jun 17 | Jun 24 | Sep 2 – Oct 21 | 70–100 |
| Wax Beans | — | Jun 17 | — | Aug 12 – Oct 7 | 50–65 |
| Winter Melon | Apr 15 | Jun 17 | Jun 24 | Sep 23 – Nov 11 | 90–120 |
| Yard Long Beans | Apr 15 | Jun 17 | Jun 24 | Aug 19 – Sep 30 | 55–80 |
| Zucchini | May 6 | Jun 17 | Jun 24 | Aug 12 – Oct 7 | 45–60 |
🍓 Fruits to Grow in Summit County
27 fruits that grow well in Zone 5a with planting dates for Summit County.
Show all 27 fruits with planting dates
| Plant | Start Indoors | Direct Sow | Transplant | Harvest | Days to Maturity |
|---|---|---|---|---|---|
| Alpine Strawberries | — | — | Jul 1 | Sep 30 – Dec 16 | 90–180 |
| Aronia | — | — | Jul 1 | — | 730–1095 |
| Blackberries | — | — | Jul 1 | — | 365–730 |
| Blueberries | — | — | Jul 1 | — | 730–1095 |
| Boysenberries | — | — | Jul 1 | — | 365–730 |
| Cantaloupe | — | — | Jul 1 | Sep 9 – Oct 14 | 70–90 |
| Che Fruit | — | — | Jul 1 | — | 1095–1825 |
| Cranberries | — | — | Jul 1 | — | 730–1095 |
| Currants | — | — | Jul 1 | — | 730–1095 |
| Elderberries | — | — | Jul 1 | — | 730–1095 |
| Goji Berries | — | — | Jul 1 | — | 730–1095 |
| Gooseberries | — | — | Jul 1 | — | 730–1095 |
| Grapes | — | — | Jul 1 | — | 730–1095 |
| Ground Cherry | — | — | Jul 1 | Sep 9 – Nov 4 | 65–80 |
| Hardy Kiwi | — | — | Jul 1 | — | 1095–1825 |
| Haskaps | — | — | Jul 1 | — | 730–1095 |
| Honeydew | — | — | Jul 1 | Sep 23 – Nov 4 | 80–110 |
| Jostaberry | — | — | Jul 1 | — | 730–1095 |
| Lingonberries | — | — | Jul 1 | — | 730–1095 |
| Medlar | — | — | Jul 1 | — | 1095–1825 |
| Mulberries | — | — | Jul 1 | — | 730–1825 |
| Pawpaw | — | — | Jul 1 | — | 1095–2555 |
| Persimmon | — | — | Jul 1 | — | 1095–2555 |
| Quince | — | — | Jul 1 | — | 1095–1825 |
| Raspberries | — | — | Jul 1 | — | 365–730 |
| Serviceberries | — | — | Jul 1 | — | 730–1095 |
| Strawberries | — | — | Jul 1 | Sep 30 – Dec 16 | 90–365 |
🌿 Herbs to Grow in Summit County
37 herbs that grow well in Zone 5a with planting dates for Summit County.
Show all 37 herbs with planting dates
| Plant | Start Indoors | Direct Sow | Transplant | Harvest | Days to Maturity |
|---|---|---|---|---|---|
| Angelica | May 6 | May 27 | Jun 3 | — | 365–730 |
| Anise | May 6 | May 27 | Jun 3 | Sep 2 – Nov 18 | 90–120 |
| Basil | Apr 22 | Jun 17 | Jun 24 | Aug 19 – Oct 21 | 50–75 |
| Bee Balm | — | — | Jun 17 | Sep 16 – Dec 2 | 90–120 |
| Borage | May 6 | May 27 | Jun 3 | Jul 29 – Sep 16 | 50–60 |
| Caraway | May 6 | May 27 | Jun 3 | — | 365–450 |
| Catnip | — | — | Jun 17 | Aug 19 – Oct 21 | 60–80 |
| Chamomile | May 6 | May 27 | Jun 3 | Aug 5 – Oct 14 | 60–90 |
| Chervil | May 6 | May 27 | Jun 3 | Jul 15 – Sep 16 | 40–60 |
| Chives | — | — | Jun 17 | Aug 19 – Oct 28 | 60–90 |
| Cilantro | May 6 | May 27 | Jun 3 | Jul 15 – Sep 16 | 40–60 |
| Comfrey | — | — | Jun 17 | Aug 19 – Oct 28 | 60–90 |
| Cumin | May 6 | May 27 | Jun 3 | Sep 16 – Nov 18 | 100–120 |
| Dill | May 6 | May 27 | Jun 3 | Jul 15 – Sep 16 | 40–60 |
| Echinacea | — | — | Jun 17 | Oct 21 – Dec 2 | 120–180 |
| Epazote | Apr 22 | Jun 17 | Jun 24 | Aug 12 – Oct 7 | 45–60 |
| Fennel (herb) | May 6 | May 27 | Jun 3 | Aug 5 – Oct 14 | 60–90 |
| Feverfew | — | — | Jun 17 | Sep 16 – Dec 2 | 90–120 |
| Garlic Chives | — | — | Jun 17 | Aug 19 – Oct 28 | 60–90 |
| Horehound | — | — | Jun 17 | Sep 2 – Oct 28 | 75–90 |
| Hyssop | — | — | Jun 17 | Aug 26 – Oct 28 | 70–90 |
| Lavender | — | — | Jun 17 | Sep 16 – Dec 2 | 90–200 |
| Lemon Balm | — | — | Jun 17 | Aug 19 – Oct 7 | 60–70 |
| Lemon Thyme | — | — | Jun 17 | Aug 26 – Oct 28 | 70–90 |
| Lovage | — | — | Jun 17 | Aug 26 – Oct 28 | 70–90 |
| Mint | — | — | Jun 17 | Aug 19 – Oct 28 | 60–90 |
| Oregano | — | — | Jun 17 | Aug 19 – Oct 28 | 60–90 |
| Parsley | May 6 | May 27 | Jun 3 | Aug 5 – Oct 7 | 60–80 |
| Rue | — | — | Jun 17 | Aug 26 – Oct 28 | 70–90 |
| Sage | — | — | Jun 17 | Sep 2 – Oct 28 | 75–90 |
| Savory | — | — | Jun 17 | Aug 12 – Oct 7 | 50–70 |
| Sorrel | May 6 | May 27 | Jun 3 | Jul 15 – Sep 16 | 40–60 |
| Tarragon | — | — | Jun 17 | Aug 19 – Oct 28 | 60–90 |
| Thai Basil | Apr 22 | Jun 17 | Jun 24 | Aug 19 – Oct 21 | 50–75 |
| Thyme | — | — | Jun 17 | Aug 26 – Oct 28 | 70–90 |
| Valerian | — | — | Jun 17 | Oct 21 – Dec 2 | 120–180 |
| Yarrow | — | — | Jun 17 | Sep 16 – Dec 2 | 90–120 |
Monthly Planting Guide for Summit County
Gardening Guides & Resources
Helpful guides from The Ultimate Homestead to improve your garden in Summit County.
Frequently Asked Questions
What planting zone is Summit County, UT?
Summit 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 Summit County, UT?
Based on 31 years of NOAA weather station data, the median last spring frost in Summit County falls around June 10. In 8 out of 10 years, last frost lands between May 13 and June 21 — a 38-day window of variability. Use June 21 as your conservative safe-to-plant date for frost-sensitive crops.
When is the first fall frost in Summit County, UT?
The median first fall frost in Summit County arrives around September 12. In cold years it can arrive as early as August 23; in mild years as late as September 30. Harvest or protect frost-sensitive crops — tomatoes, peppers, basil, squash — before this date.
How long is the growing season in Summit County?
Summit County has a frost-free growing season of approximately 94 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 shorter by about 0.67 days per decade.
What is the soil like in Summit County for gardening?
Summit County has predominantly Loam soil with a pH range of 6.4–8.3 and Moderately Well Drained drainage. Most vegetables and herbs grow well with standard composting and seasonal soil amendment.
What is grown commercially in Summit County?
Summit County has commercial agriculture that includes Cattle, Wheat, Hay, Barley. These crops reflect the local climate and soil conditions — what succeeds commercially often translates well to home gardens in the same area.
Is Summit County a good location for home gardening?
Summit County scores 45/100 (Moderate) on our Microclimate Index, which combines frost reliability, drought pressure, soil challenge, elevation risk, and long-term climate trend. Gardening here benefits from close attention to frost timing and season extension due to the challenging microclimate factors.
Plan Your Garden with Confidence
Get our free Garden Planner — designed to help Summit County gardeners in Zone 5a organize planting dates, track what's growing, and never miss a planting window.
Get Your Free Garden Planner →Free download. Plan your entire garden season in minutes.
