Dewey County, OK — Planting Guide
Dewey County is in USDA Zone 7a. The average last spring frost is April 13 and the first fall frost is October 24, giving you a growing season of approximately 194 days.
At an elevation of 745 ft, Dewey County receives approximately 28.5 in of rainfall annually. Summer highs average 93°F with winter lows around 29°F. The predominant soil type is Loam.
Based on 31 years of NOAA climate station data, the last frost date here varies by 33 days year to year — ranging from March 26 in warm years to April 29 in cold years. Dewey County scores 72/100 (Good) on the Microclimate Index.
🌡️ Zone
7a (0°F to 5°F min)
❄️ Last Frost
April 13
🍂 First Frost
October 24
📅 Growing Season
194 days
⛰️ Elevation
745 ft
🌧️ Annual Rainfall
28.5 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 | 0.7 in | 3 days | — | None |
| Feb | 1.1 in | 5 days | — | None |
| Mar | 1.9 in | 5 days | 2.4 in | High |
| Apr | 3 in | 7 days | 1.3 in | Moderate |
| May | 4.6 in | 9 days | — | Low |
| Jun | 4.6 in | 9 days | — | Low |
| Jul | 3.5 in | 7 days | 0.8 in | Moderate |
| Aug | 3.3 in | 7 days | 1 in | Moderate |
| Sep | 2.5 in | 6 days | 1.8 in | High |
| Oct | 1.7 in | 4 days | 2.6 in | High |
| Nov | 0.9 in | 3 days | — | None |
| Dec | 0.8 in | 3 days | — | None |
Annual total: 28.6 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.
Dewey County Soil Profile
Soil Type
Loam
Soil pH
6.2-7.2
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) | Apr 29 | Nov 9 | 194 days |
| Cautious | Apr 17 | Oct 31 | 197 days |
| Average year | Apr 13 | Oct 24 | 194 days |
| Optimistic | Apr 6 | Oct 18 | 195 days |
| Aggressive (risky) | Mar 26 | Oct 10 | 198 days |
Not very — frost dates can vary by ±33 days year-to-year. Use the "Conservative" row in the table below, and keep row covers handy for surprise late frosts.
Gardening Difficulty Score
Dewey County offers good growing conditions. A little planning around frost dates goes a long way.
Local Gardening Help in Dewey 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 Dewey County's climate and soil.
County Extension Office
Dewey County Oklahoma State University Extension Extension Office
Phone: 405-744-5398
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 Dewey County
Finding local nurseries & garden centers in Dewey County
Why Buy Local
Local nurseries carry plants that are proven to grow in your area. Staff can give you advice specific to Dewey 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 Dewey County OK" or "garden center Dewey 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 Dewey County OK" or check your extension office and local parks department. Facebook groups like "Dewey County Gardeners" or "Oklahoma 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
14.4 hours
Summer solstice daylight
Shortest Day
9.6 hours
Winter solstice daylight
Peak Sun Hours
10 hr/day peak (summer)
Peak sun hours (green dashed line below) account for cloud cover — this is the usable direct sunlight your garden actually receives. Most vegetables need 6+ peak sun hours.
Onion tip: Day-neutral onion varieties like Candy, Cabernet, and Sierra Blanca perform best in your day-length range.
View detailed monthly data
| Month | Daylight Hours | Peak Sun Hours | Day Length |
|---|---|---|---|
| January | 9.8 hr | 5.2 hr | Short day |
| February | 10.7 hr | 6 hr | Short day |
| March | 11.7 hr | 7.2 hr | Short day |
| April | 12.9 hr | 8.2 hr | Neutral |
| May | 13.9 hr | 8.6 hr | Neutral |
| June | 14.4 hr | 9.5 hr | Long day |
| July | 14.2 hr | 10 hr | Long day |
| August | 13.4 hr | 9.2 hr | Neutral |
| September | 12.2 hr | 8.4 hr | Neutral |
| October | 11.1 hr | 7 hr | Short day |
| November | 10.1 hr | 5.8 hr | Short day |
| December | 9.6 hr | 5.3 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 May through Oct.
Best Month to Compost
May
Microbial activity peaks when soil is warm.
Active Composting
8 months
Nearly year-round composting.
View detailed monthly data
| Month | Soil 4" Deep | Soil 8" Deep | Compost Activity | Time to Finish |
|---|---|---|---|---|
| Jan | 37°F | 44°F | ❄️ Dormant | ~36 weeks |
| Feb | 40°F | 46°F | 🐢 Slow | ~24 weeks |
| Mar | 46°F | 48°F | 🐢 Slow | ~24 weeks |
| Apr | 57°F | 56°F | ♻️ Active | ~14 weeks |
| May | 69°F | 65°F | 🔥 Peak | ~8 weeks |
| Jun | 78°F | 74°F | 🔥 Peak | ~8 weeks |
| Jul | 85°F | 80°F | 🔥 Peak | ~8 weeks |
| Aug | 86°F | 84°F | 🔥 Peak | ~8 weeks |
| Sep | 80°F | 81°F | 🔥 Peak | ~8 weeks |
| Oct | 68°F | 71°F | 🔥 Peak | ~8 weeks |
| Nov | 54°F | 60°F | ♻️ Active | ~14 weeks |
| Dec | 45°F | 50°F | 🐢 Slow | ~24 weeks |
Highlighted rows = soil 60°F+ (safe for warm-season transplants). Compost finishes fastest during peak activity months.
Pest & Disease Pressure in Dewey 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 6 common pests in your area
| Pest | Risk Level | Peak Months |
|---|---|---|
| Aphids | High | Mar, Apr, May, Jun, Jul, Aug, Sep, Oct |
| Japanese beetles | Moderate | Jun, Jul, Aug |
| Squash vine borers | Moderate | May, Jun, Jul |
| Stink bugs | Moderate | May, Jun, Jul, Aug, Sep |
| Whiteflies | Low | Jun, Jul, Aug, Sep |
| Spider mites | Moderate | Jul, Aug |
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 Dewey County
Cover crops protect bare soil, fix nitrogen, suppress weeds, and improve soil structure — with county-specific planting dates.
Spring Cover Crops (4 options) — Build soil before the main growing season
| Crop | Plant By | Terminate | N-Fixing | Soil Benefit |
|---|---|---|---|---|
| Buckwheat | Apr 18 | Aug 22 | — | Rapid growth, attracts pollinators, suppresses weeds |
| Cowpeas (southern peas) | Apr 17 | Aug 15 | ✓ Yes | Excellent nitrogen fixer for warm climates, edible |
| Sorghum-sudan grass | Apr 19 | Aug 22 | — | Massive biomass, breaks compaction, suppresses nematodes |
| White clover | Mar 13 | Aug 29 | ✓ 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 | Apr 27 | Sep 26 | — | Deep roots break compaction, attract pollinators and beneficial insects |
Fall Cover Crops (7 options) — Plant after harvest to protect soil over winter
| Crop | Plant By | Terminate | N-Fixing | Soil Benefit |
|---|---|---|---|---|
| Austrian winter peas | Aug 30 | Mar 30 | ✓ Yes | Fixes nitrogen, good for heavy clay soils |
| Crimson clover | Aug 12 | Mar 30 | ✓ Yes | Fixes nitrogen, attracts pollinators in spring |
| Daikon radish | Sep 7 | Mar 23 | — | Deep taproot breaks compaction, excellent for clay soils |
| Hairy vetch | Aug 17 | Mar 23 | ✓ Yes | Excellent nitrogen fixer, good for depleted soils |
| Oats | Sep 27 | Mar 30 | — | Quick biomass, winterkills in cold zones — no spring tillage needed |
| Winter rye | Jul 21 | Mar 23 | — | Suppresses weeds, prevents erosion, breaks up compacted soil |
| Winter wheat | Jul 17 | Mar 23 | — | 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: 15 mph Summer: 11 mph
Fall: 14 mph Winter: 16 mph
Prevailing wind: S. Windy area — plant a windbreak hedge on the S side of your garden.
Windbreak Benefit
7/10
Strongly recommended — a windbreak (fence, hedge, or row of tall crops like corn or sunflowers) will significantly improve garden yields.
Frost Pocket Risk
Low
Relatively flat terrain (153 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
14,254 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 2,000 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, 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 28.6 inches of rain per year
- A 1,000 sq ft roof can collect roughly 14,254 gallons annually
- Rainwater harvesting is fully legal in your state
- Stock up on stored water before your dry season (Jan, Nov, Dec)
- Use a first-flush diverter to keep roof debris out of your collection
Soil & Growing Conditions in Dewey County
Soil Type
Loam
Soil pH 6.2–7.2 · 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
194-day frost-free season
Plenty of time for warm-season crops. Start heat-lovers indoors 6–8 weeks before last frost to maximise your harvest window.
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 Dewey County
113 vegetables that grow well in Zone 7a with planting dates for Dewey County.
Show all 113 vegetables with planting dates
| Plant | Start Indoors | Direct Sow | Transplant | Harvest | Days to Maturity |
|---|---|---|---|---|---|
| Acorn Squash | Mar 16 | Apr 20 | Apr 27 | Jul 20 – Aug 24 | 80–100 |
| Amaranth | Feb 23 | Apr 20 | Apr 27 | Jul 27 – Sep 14 | 90–120 |
| Artichoke | — | — | Apr 27 | Aug 31 – Nov 9 | 120–180 |
| Arugula | Mar 9 | Mar 30 | Apr 13 | May 18 – Jul 20 | 30–50 |
| Asparagus | — | — | Apr 27 | — | 730–1095 |
| Beets | — | Mar 30 | — | May 25 – Jun 22 | 50–70 |
| Belgian Endive | Mar 9 | Mar 30 | Apr 13 | Aug 3 – Sep 28 | 110–150 |
| Bitter Melon | Feb 23 | Apr 20 | Apr 27 | Jun 29 – Aug 10 | 60–90 |
| Black Beans | — | Apr 20 | — | Jul 20 – Sep 7 | 90–120 |
| Bok Choy | Mar 9 | Mar 30 | Apr 13 | May 25 – Jun 29 | 40–60 |
| Broccoli | Mar 9 | Mar 30 | Apr 13 | Jun 15 – Jul 27 | 60–90 |
| Broccoli Rabe | Mar 9 | Mar 30 | Apr 13 | May 25 – Jun 29 | 40–60 |
| Brussels Sprouts | Mar 9 | Mar 30 | Apr 13 | Jul 13 – Sep 7 | 90–130 |
| Butternut Squash | Mar 16 | Apr 20 | Apr 27 | Jul 27 – Aug 31 | 85–110 |
| Cabbage | Mar 9 | Mar 30 | Apr 13 | Jun 15 – Aug 10 | 60–100 |
| Calabash | Feb 23 | Apr 20 | Apr 27 | Jul 20 – Sep 14 | 80–120 |
| Cardoon | — | — | Apr 27 | Aug 31 – Oct 12 | 120–150 |
| Carrots | — | Mar 30 | — | Jun 1 – Jul 6 | 60–80 |
| Cauliflower | Mar 9 | Mar 30 | Apr 13 | Jun 8 – Aug 10 | 55–100 |
| Celeriac | Mar 9 | Mar 30 | Apr 13 | Jul 27 – Aug 31 | 100–120 |
| Celery | Mar 9 | Mar 30 | Apr 13 | Jul 6 – Aug 31 | 80–120 |
| Celtuce | Mar 9 | Mar 30 | Apr 13 | Jun 15 – Jul 27 | 60–90 |
| Chard | Mar 9 | Mar 30 | Apr 13 | Jun 8 – Jul 27 | 50–60 |
| Chayote | Feb 23 | Apr 20 | Apr 27 | Aug 31 – Nov 9 | 120–180 |
| Chickpeas | Mar 9 | Mar 30 | Apr 13 | Jul 6 – Aug 17 | 80–110 |
| Chicory | Mar 9 | Mar 30 | Apr 13 | Jun 15 – Jul 27 | 60–85 |
| Chinese Cabbage | Mar 9 | Mar 30 | Apr 13 | Jun 8 – Jul 6 | 50–70 |
| Christmas Lima Beans | Feb 23 | Apr 20 | Apr 27 | Jul 20 – Aug 24 | 80–100 |
| Collard Greens | Mar 9 | Mar 30 | Apr 13 | Jun 8 – Aug 10 | 55–75 |
| Corn | — | Apr 20 | — | Jun 22 – Aug 17 | 60–100 |
| Cowpeas | — | Apr 20 | — | Jun 22 – Aug 3 | 60–90 |
| Cress | Mar 9 | Mar 30 | Apr 13 | Apr 27 – May 18 | 14–21 |
| Crookneck Squash | Mar 16 | Apr 20 | Apr 27 | Jun 15 – Jul 13 | 45–60 |
| Crosne | — | Mar 30 | — | Aug 31 – Nov 2 | 150–200 |
| Cucumber | Mar 16 | Apr 20 | Apr 27 | Jun 22 – Aug 17 | 50–70 |
| Daikon | — | Mar 30 | — | May 25 – Jun 22 | 50–70 |
| Delicata Squash | Mar 16 | Apr 20 | Apr 27 | Jul 20 – Aug 24 | 80–100 |
| Edamame | — | Apr 20 | — | Jul 6 – Aug 17 | 75–100 |
| Eggplant | Feb 9 | Apr 20 | Apr 27 | Jul 6 – Sep 7 | 65–85 |
| Endive | Mar 9 | Mar 30 | Apr 13 | Jun 1 – Jul 6 | 45–65 |
| Escarole | Mar 9 | Mar 30 | Apr 13 | Jun 8 – Jul 6 | 50–70 |
| Fava Beans | Mar 9 | Mar 30 | Apr 13 | Jun 29 – Aug 10 | 75–100 |
| Fennel | Feb 23 | Apr 20 | Apr 27 | Jun 29 – Aug 10 | 60–90 |
| Garlic | — | — | — | — | 90–240 |
| Green Beans | — | Apr 20 | — | Jun 15 – Aug 10 | 50–65 |
| Horseradish | — | — | Apr 27 | Aug 31 – Nov 9 | 120–180 |
| Hot Peppers | Feb 9 | Apr 20 | Apr 27 | Jul 6 – Oct 12 | 70–120 |
| Hubbard Squash | Mar 16 | Apr 20 | Apr 27 | Aug 10 – Sep 14 | 100–120 |
| Jicama | Feb 23 | Apr 20 | Apr 27 | Aug 31 – Nov 9 | 120–180 |
| Kabocha | Mar 16 | Apr 20 | Apr 27 | Jul 27 – Aug 24 | 85–100 |
| Kai Lan | Mar 9 | Mar 30 | Apr 13 | Jun 1 – Jun 29 | 45–60 |
| Kale | Mar 9 | Mar 30 | Apr 13 | Jun 8 – Aug 3 | 50–70 |
| Kidney Beans | — | Apr 20 | — | Jul 20 – Aug 24 | 85–110 |
| Kohlrabi | Mar 9 | Mar 30 | Apr 13 | Jun 1 – Jul 6 | 45–65 |
| Komatsuna | Mar 9 | Mar 30 | Apr 13 | May 18 – Jun 22 | 35–50 |
| Leeks | Mar 9 | Mar 30 | Apr 13 | Jul 13 – Sep 28 | 90–150 |
| Lentils | Mar 9 | Mar 30 | Apr 13 | Jul 6 – Aug 17 | 80–110 |
| Lettuce | Mar 9 | Mar 30 | Apr 13 | May 18 – Jul 27 | 30–60 |
| Lima Beans | — | Apr 20 | — | Jun 22 – Aug 3 | 60–90 |
| Loofah | Feb 23 | Apr 20 | Apr 27 | Aug 10 – Oct 12 | 100–150 |
| Luffa | Feb 23 | Apr 20 | Apr 27 | Jul 27 – Oct 12 | 90–150 |
| Mache | Mar 9 | Mar 30 | Apr 13 | May 25 – Jun 29 | 40–60 |
| Malabar Spinach | Feb 23 | Apr 20 | Apr 27 | Jun 22 – Jul 20 | 55–70 |
| Melon | Mar 16 | Apr 20 | Apr 27 | Jul 6 – Aug 24 | 70–100 |
| Microgreens | Mar 9 | Mar 30 | Apr 13 | Apr 20 – May 18 | 7–21 |
| Mitsuba | Mar 9 | Mar 30 | Apr 6 | Jun 1 – Jul 27 | 50–70 |
| Mizuna | Mar 9 | Mar 30 | Apr 13 | May 18 – Jun 15 | 30–45 |
| Mustard Greens | Mar 9 | Mar 30 | Apr 13 | May 18 – Jul 20 | 30–50 |
| Napa Cabbage | Mar 9 | Mar 30 | Apr 13 | Jun 8 – Jul 13 | 55–75 |
| New Zealand Spinach | Feb 23 | Apr 20 | Apr 27 | Jun 22 – Jul 20 | 55–70 |
| Okra | Feb 23 | Apr 20 | Apr 27 | Jun 22 – Aug 17 | 50–65 |
| Onion | Mar 9 | Mar 30 | Apr 13 | Jul 13 – Aug 31 | 90–120 |
| Pac Choi | Mar 9 | Mar 30 | Apr 13 | May 25 – Jun 22 | 40–55 |
| Parsnip | — | Mar 30 | — | Jul 13 – Aug 24 | 100–130 |
| Patty Pan Squash | Mar 16 | Apr 20 | Apr 27 | Jun 15 – Jul 13 | 45–60 |
| Peas | Mar 9 | Mar 30 | Apr 13 | Jun 8 – Aug 3 | 55–70 |
| Peppers | Feb 9 | Apr 20 | Apr 27 | Jun 29 – Sep 7 | 60–90 |
| Pole Beans | Feb 23 | Apr 20 | Apr 27 | Jun 22 – Aug 17 | 55–70 |
| Potatoes | Feb 23 | Apr 20 | Apr 27 | Jul 6 – Sep 14 | 70–120 |
| Pumpkin | Mar 16 | Apr 20 | Apr 27 | Jul 27 – Sep 14 | 85–120 |
| Purslane | Mar 9 | Mar 30 | Apr 13 | May 25 – Jun 29 | 40–60 |
| Radicchio | Mar 9 | Mar 30 | Apr 13 | Jun 15 – Jul 20 | 60–80 |
| Radish | — | Mar 30 | — | Apr 27 – May 18 | 22–35 |
| Rhubarb | — | — | May 4 | — | 365–730 |
| Romanesco | Mar 9 | Mar 30 | Apr 13 | Jun 29 – Aug 10 | 75–100 |
| Rutabaga | — | Mar 30 | — | Jun 22 – Jul 27 | 80–100 |
| Salsify | — | Mar 30 | — | Jul 13 – Aug 24 | 100–130 |
| Savoy Cabbage | Mar 9 | Mar 30 | Apr 13 | Jun 22 – Aug 17 | 70–110 |
| Scallions | Mar 9 | Mar 30 | Apr 13 | Jun 8 – Jul 6 | 50–70 |
| Scarlet Runner Beans | Feb 23 | Apr 20 | Apr 27 | Jun 29 – Aug 3 | 60–80 |
| Shallot | Mar 9 | Mar 30 | Apr 13 | Jul 13 – Aug 31 | 90–120 |
| Shiso | Feb 23 | Apr 20 | Apr 27 | Jun 22 – Aug 17 | 50–70 |
| Snap Peas | Feb 23 | Apr 20 | Apr 27 | Jun 22 – Aug 17 | 55–70 |
| Snow Peas | Mar 9 | Mar 30 | Apr 13 | Jun 8 – Aug 3 | 50–65 |
| Soybeans | — | Apr 20 | — | Jul 13 – Sep 7 | 80–120 |
| Spaghetti Squash | Mar 16 | Apr 20 | Apr 27 | Jul 27 – Aug 24 | 85–100 |
| Spinach | Mar 9 | Mar 30 | Apr 13 | May 18 – Jul 20 | 35–50 |
| Squash (Summer) | Mar 16 | Apr 20 | Apr 27 | Jun 15 – Aug 17 | 45–65 |
| Squash (Winter) | Mar 16 | Apr 20 | Apr 27 | Jul 20 – Sep 14 | 80–120 |
| Sunchoke | — | — | Apr 27 | Aug 17 – Oct 12 | 110–150 |
| Sunflower | Feb 23 | Apr 20 | Apr 27 | Jul 6 – Aug 24 | 70–100 |
| Sweet Corn | — | Apr 20 | — | Jun 22 – Aug 3 | 60–90 |
| Sweet Potatoes | Feb 23 | Apr 20 | Apr 27 | Jul 27 – Sep 14 | 90–120 |
| Tatsoi | Mar 9 | Mar 30 | Apr 13 | May 18 – Jun 22 | 35–50 |
| Tomatillo | Feb 23 | Apr 20 | Apr 27 | Jun 29 – Sep 7 | 60–85 |
| Tomatoes | Feb 23 | Apr 20 | Apr 27 | Jun 29 – Sep 7 | 60–85 |
| Turnip | — | Mar 30 | — | May 11 – Jun 15 | 40–60 |
| Watercress | Mar 9 | Mar 30 | Apr 13 | May 25 – Jun 29 | 40–60 |
| Watermelon | Mar 16 | Apr 20 | Apr 27 | Jul 6 – Aug 24 | 70–100 |
| Wax Beans | — | Apr 20 | — | Jun 15 – Aug 10 | 50–65 |
| Winter Melon | Feb 23 | Apr 20 | Apr 27 | Jul 27 – Sep 14 | 90–120 |
| Yard Long Beans | Feb 23 | Apr 20 | Apr 27 | Jun 22 – Aug 3 | 55–80 |
| Zucchini | Mar 16 | Apr 20 | Apr 27 | Jun 15 – Aug 10 | 45–60 |
🍓 Fruits to Grow in Dewey County
31 fruits that grow well in Zone 7a with planting dates for Dewey County.
Show all 31 fruits with planting dates
| Plant | Start Indoors | Direct Sow | Transplant | Harvest | Days to Maturity |
|---|---|---|---|---|---|
| Alpine Strawberries | — | — | May 4 | Aug 3 – Nov 16 | 90–180 |
| Aronia | — | — | May 4 | — | 730–1095 |
| Blackberries | — | — | May 4 | — | 365–730 |
| Blueberries | — | — | May 4 | — | 730–1095 |
| Boysenberries | — | — | May 4 | — | 365–730 |
| Cantaloupe | — | — | May 4 | Jul 13 – Aug 17 | 70–90 |
| Che Fruit | — | — | May 4 | — | 1095–1825 |
| Cranberries | — | — | May 4 | — | 730–1095 |
| Currants | — | — | May 4 | — | 730–1095 |
| Elderberries | — | — | May 4 | — | 730–1095 |
| Figs | — | — | May 4 | — | 730–1825 |
| Goji Berries | — | — | May 4 | — | 730–1095 |
| Gooseberries | — | — | May 4 | — | 730–1095 |
| Grapes | — | — | May 4 | — | 730–1095 |
| Ground Cherry | — | — | May 4 | Jul 13 – Sep 7 | 65–80 |
| Hardy Kiwi | — | — | May 4 | — | 1095–1825 |
| Haskaps | — | — | May 4 | — | 730–1095 |
| Honeydew | — | — | May 4 | Jul 27 – Sep 7 | 80–110 |
| Jostaberry | — | — | May 4 | — | 730–1095 |
| Kiwi | — | — | May 4 | — | 1095–1825 |
| Lingonberries | — | — | May 4 | — | 730–1095 |
| Loquat | — | — | May 4 | — | 730–1825 |
| Medlar | — | — | May 4 | — | 1095–1825 |
| Mulberries | — | — | May 4 | — | 730–1825 |
| Pawpaw | — | — | May 4 | — | 1095–2555 |
| Persimmon | — | — | May 4 | — | 1095–2555 |
| Pomegranate | — | — | May 4 | — | 730–1095 |
| Quince | — | — | May 4 | — | 1095–1825 |
| Raspberries | — | — | May 4 | — | 365–730 |
| Serviceberries | — | — | May 4 | — | 730–1095 |
| Strawberries | — | — | May 4 | Aug 3 – Dec 14 | 90–365 |
🌿 Herbs to Grow in Dewey County
39 herbs that grow well in Zone 7a with planting dates for Dewey County.
Show all 39 herbs with planting dates
| Plant | Start Indoors | Direct Sow | Transplant | Harvest | Days to Maturity |
|---|---|---|---|---|---|
| Angelica | Mar 9 | Mar 30 | Apr 6 | — | 365–730 |
| Anise | Mar 9 | Mar 30 | Apr 6 | Jul 6 – Sep 21 | 90–120 |
| Basil | Feb 23 | Apr 20 | Apr 27 | Jun 22 – Aug 24 | 50–75 |
| Bee Balm | — | — | Apr 20 | Jul 20 – Oct 5 | 90–120 |
| Borage | Mar 9 | Mar 30 | Apr 6 | Jun 1 – Jul 20 | 50–60 |
| Caraway | Mar 9 | Mar 30 | Apr 6 | — | 365–450 |
| Catnip | — | — | Apr 20 | Jun 22 – Aug 24 | 60–80 |
| Chamomile | Mar 9 | Mar 30 | Apr 6 | Jun 8 – Aug 17 | 60–90 |
| Chervil | Mar 9 | Mar 30 | Apr 6 | May 18 – Jul 20 | 40–60 |
| Chives | — | — | Apr 20 | Jun 22 – Aug 31 | 60–90 |
| Cilantro | Mar 9 | Mar 30 | Apr 6 | May 18 – Jul 20 | 40–60 |
| Comfrey | — | — | Apr 20 | Jun 22 – Aug 31 | 60–90 |
| Cumin | Mar 9 | Mar 30 | Apr 6 | Jul 20 – Sep 21 | 100–120 |
| Dill | Mar 9 | Mar 30 | Apr 6 | May 18 – Jul 20 | 40–60 |
| Echinacea | — | — | Apr 20 | Aug 24 – Nov 30 | 120–180 |
| Epazote | Feb 23 | Apr 20 | Apr 27 | Jun 15 – Aug 10 | 45–60 |
| Fennel (herb) | Mar 9 | Mar 30 | Apr 6 | Jun 8 – Aug 17 | 60–90 |
| Feverfew | — | — | Apr 20 | Jul 20 – Oct 5 | 90–120 |
| Garlic Chives | — | — | Apr 20 | Jun 22 – Aug 31 | 60–90 |
| Horehound | — | — | Apr 20 | Jul 6 – Aug 31 | 75–90 |
| Hyssop | — | — | Apr 20 | Jun 29 – Aug 31 | 70–90 |
| Lavender | — | — | Apr 20 | Jul 20 – Nov 30 | 90–200 |
| Lemon Balm | — | — | Apr 20 | Jun 22 – Aug 10 | 60–70 |
| Lemon Thyme | — | — | Apr 20 | Jun 29 – Aug 31 | 70–90 |
| Lovage | — | — | Apr 20 | Jun 29 – Aug 31 | 70–90 |
| Marjoram | — | — | Apr 20 | Jun 22 – Aug 31 | 60–90 |
| Mint | — | — | Apr 20 | Jun 22 – Aug 31 | 60–90 |
| Oregano | — | — | Apr 20 | Jun 22 – Aug 31 | 60–90 |
| Parsley | Mar 9 | Mar 30 | Apr 6 | Jun 8 – Aug 10 | 60–80 |
| Rosemary | — | — | Apr 20 | Jul 13 – Nov 30 | 80–180 |
| Rue | — | — | Apr 20 | Jun 29 – Aug 31 | 70–90 |
| Sage | — | — | Apr 20 | Jul 6 – Aug 31 | 75–90 |
| Savory | — | — | Apr 20 | Jun 15 – Aug 10 | 50–70 |
| Sorrel | Mar 9 | Mar 30 | Apr 6 | May 18 – Jul 20 | 40–60 |
| Tarragon | — | — | Apr 20 | Jun 22 – Aug 31 | 60–90 |
| Thai Basil | Feb 23 | Apr 20 | Apr 27 | Jun 22 – Aug 24 | 50–75 |
| Thyme | — | — | Apr 20 | Jun 29 – Aug 31 | 70–90 |
| Valerian | — | — | Apr 20 | Aug 24 – Nov 30 | 120–180 |
| Yarrow | — | — | Apr 20 | Jul 20 – Oct 5 | 90–120 |
Monthly Planting Guide for Dewey County
Gardening Guides & Resources
Helpful guides from The Ultimate Homestead to improve your garden in Dewey County.
Frequently Asked Questions
What planting zone is Dewey County, OK?
Dewey County is in USDA Hardiness Zone 7a. 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 Dewey County, OK?
Based on 31 years of NOAA weather station data, the median last spring frost in Dewey County falls around April 13. In 8 out of 10 years, last frost lands between March 26 and April 29 — a 33-day window of variability. Use April 29 as your conservative safe-to-plant date for frost-sensitive crops.
When is the first fall frost in Dewey County, OK?
The median first fall frost in Dewey County arrives around October 24. In cold years it can arrive as early as October 10; in mild years as late as November 9. Harvest or protect frost-sensitive crops — tomatoes, peppers, basil, squash — before this date.
How long is the growing season in Dewey County?
Dewey County has a frost-free growing season of approximately 194 days. This is enough time for most warm-season crops including tomatoes, peppers, and squash with proper timing.
What is the soil like in Dewey County for gardening?
Dewey County has predominantly Loam soil with a pH range of 6.2–7.2 and Well Drained drainage. Most vegetables and herbs grow well with standard composting and seasonal soil amendment.
What is grown commercially in Dewey County?
Dewey County has commercial agriculture that includes Wheat, Cattle, Hay. These crops reflect the local climate and soil conditions — what succeeds commercially often translates well to home gardens in the same area.
Is Dewey County a good location for home gardening?
Dewey County scores 72/100 (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.
Plan Your Garden with Confidence
Get our free Garden Planner — designed to help Dewey County gardeners in Zone 7a 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.
