Custer County, OK — Planting Guide
Custer County is in USDA Zone 7a. The average last spring frost is April 8 and the first fall frost is October 31, giving you a growing season of approximately 206 days.
At an elevation of 767 ft, Custer County receives approximately 31.6 in of rainfall annually. Summer highs average 89°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 29 days year to year — ranging from March 19 in warm years to April 18 in cold years. Custer County scores 74/100 (Good) on the Microclimate Index.
🌡️ Zone
7a (0°F to 5°F min)
❄️ Last Frost
April 8
🍂 First Frost
October 31
📅 Growing Season
206 days
⛰️ Elevation
767 ft
🌧️ Annual Rainfall
31.6 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 | 0.8 in | 3 days | — | None |
| Feb | 1.1 in | 4 days | — | None |
| Mar | 2.1 in | 6 days | 2.2 in | High |
| Apr | 3.7 in | 7 days | 0.6 in | Moderate |
| May | 4 in | 9 days | 0.3 in | Low |
| Jun | 5.4 in | 8 days | — | Low |
| Jul | 3.7 in | 9 days | 0.6 in | Moderate |
| Aug | 4.2 in | 6 days | 0.1 in | Low |
| Sep | 2.7 in | 5 days | 1.6 in | High |
| Oct | 1.9 in | 4 days | 2.4 in | High |
| Nov | 1.1 in | 3 days | — | None |
| Dec | 0.9 in | 3 days | — | None |
Annual total: 31.6 in. Gardens typically need ~1 inch of water per week during the growing season. Months marked "None" for extra water are outside the active growing season for your zone — most gardens are dormant and don't need irrigation during those months.
Custer County Soil Profile
Soil Type
Loam
Soil pH
6.5-7.2
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 18 | Nov 16 | 212 days |
| Cautious | Apr 13 | Nov 5 | 206 days |
| Average year | Apr 8 | Oct 31 | 206 days |
| Optimistic | Apr 3 | Oct 24 | 204 days |
| Aggressive (risky) | Mar 19 | Oct 15 | 210 days |
Not very — frost dates can vary by ±29 days year-to-year. Use the "Conservative" row in the table below, and keep row covers handy for surprise late frosts.
Gardening Difficulty Score
Custer County offers good growing conditions. A little planning around frost dates goes a long way.
Local Gardening Help in Custer 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 Custer County's climate and soil.
County Extension Office
Custer 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 Custer County
Finding local nurseries & garden centers in Custer County
Why Buy Local
Local nurseries carry plants that are proven to grow in your area. Staff can give you advice specific to Custer 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 Custer County OK" or "garden center Custer 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 Custer County OK" or check your extension office and local parks department. Facebook groups like "Custer 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
10.6 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 | 5.4 hr | Short day |
| February | 10.7 hr | 5.9 hr | Short day |
| March | 11.7 hr | 7 hr | Short day |
| April | 12.9 hr | 7.9 hr | Neutral |
| May | 13.9 hr | 8.7 hr | Neutral |
| June | 14.4 hr | 9.8 hr | Long day |
| July | 14.2 hr | 10.6 hr | Long day |
| August | 13.4 hr | 9.3 hr | Neutral |
| September | 12.2 hr | 7.9 hr | Neutral |
| October | 11.1 hr | 7.2 hr | Short day |
| November | 10.1 hr | 6 hr | Short day |
| December | 9.6 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 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 | 39°F | 44°F | ❄️ Dormant | ~36 weeks |
| Feb | 39°F | 44°F | ❄️ Dormant | ~36 weeks |
| Mar | 47°F | 49°F | 🐢 Slow | ~24 weeks |
| Apr | 59°F | 57°F | ♻️ Active | ~14 weeks |
| May | 66°F | 65°F | 🔥 Peak | ~8 weeks |
| Jun | 79°F | 74°F | 🔥 Peak | ~8 weeks |
| Jul | 85°F | 82°F | 🔥 Peak | ~8 weeks |
| Aug | 88°F | 83°F | 🔥 Peak | ~8 weeks |
| Sep | 80°F | 79°F | 🔥 Peak | ~8 weeks |
| Oct | 69°F | 71°F | 🔥 Peak | ~8 weeks |
| Nov | 56°F | 60°F | ♻️ Active | ~14 weeks |
| Dec | 46°F | 51°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 Custer 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 | Moderate | Mar, Apr, May, Jun, Jul, Aug, Sep, Oct |
| Japanese beetles | Moderate | Jun, Jul, Aug |
| Squash vine borers | High | May, Jun, Jul |
| Stink bugs | High | May, Jun, Jul, Aug, Sep |
| Whiteflies | Moderate | 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 Custer 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 14 | Aug 22 | — | Rapid growth, attracts pollinators, suppresses weeds |
| Cowpeas (southern peas) | Apr 17 | Aug 29 | ✓ Yes | Excellent nitrogen fixer for warm climates, edible |
| Sorghum-sudan grass | Apr 16 | Sep 5 | — | Massive biomass, breaks compaction, suppresses nematodes |
| White clover | Mar 9 | Aug 22 | ✓ 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 | May 6 | Oct 17 | — | 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 | Sep 5 | Mar 18 | ✓ Yes | Fixes nitrogen, good for heavy clay soils |
| Crimson clover | Sep 6 | Mar 18 | ✓ Yes | Fixes nitrogen, attracts pollinators in spring |
| Daikon radish | Sep 3 | Mar 18 | — | Deep taproot breaks compaction, excellent for clay soils |
| Hairy vetch | Aug 6 | Mar 25 | ✓ Yes | Excellent nitrogen fixer, good for depleted soils |
| Oats | Sep 26 | Mar 25 | — | Quick biomass, winterkills in cold zones — no spring tillage needed |
| Winter rye | Jul 25 | Mar 18 | — | Suppresses weeds, prevents erosion, breaks up compacted soil |
| Winter wheat | Jul 26 | Mar 18 | — | 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: 16 mph Summer: 11 mph
Fall: 13 mph Winter: 15 mph
Prevailing wind: S. Windy area — plant a windbreak hedge on the S side of your garden.
Windbreak Benefit
7.1/10
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 (257 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
15,749 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 2,000 gal tank.
Legal Status
Unrestricted
Rainwater harvesting is fully legal in your state with no restrictions.
Best Collection Months
Apr, May, Jun, Aug
Highest rainfall months — your barrels will fill up quickly during these months.
Months to Draw From Storage
Jan, 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 31.6 inches of rain per year
- A 1,000 sq ft roof can collect roughly 15,749 gallons annually
- Rainwater harvesting is fully legal in your state
- Use a first-flush diverter to keep roof debris out of your collection
Soil & Growing Conditions in Custer County
Soil Type
Loam
Soil pH 6.5–7.2 · Moderately 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
206-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 Custer County
113 vegetables that grow well in Zone 7a with planting dates for Custer County.
Show all 113 vegetables with planting dates
| Plant | Start Indoors | Direct Sow | Transplant | Harvest | Days to Maturity |
|---|---|---|---|---|---|
| Acorn Squash | Mar 11 | Apr 15 | Apr 22 | Jul 15 – Aug 19 | 80–100 |
| Amaranth | Feb 18 | Apr 15 | Apr 22 | Jul 22 – Sep 9 | 90–120 |
| Artichoke | — | — | Apr 22 | Aug 26 – Nov 4 | 120–180 |
| Arugula | Mar 4 | Mar 25 | Apr 8 | May 13 – Jul 15 | 30–50 |
| Asparagus | — | — | Apr 22 | — | 730–1095 |
| Beets | — | Mar 25 | — | May 20 – Jun 17 | 50–70 |
| Belgian Endive | Mar 4 | Mar 25 | Apr 8 | Jul 29 – Sep 23 | 110–150 |
| Bitter Melon | Feb 18 | Apr 15 | Apr 22 | Jun 24 – Aug 5 | 60–90 |
| Black Beans | — | Apr 15 | — | Jul 15 – Sep 2 | 90–120 |
| Bok Choy | Mar 4 | Mar 25 | Apr 8 | May 20 – Jun 24 | 40–60 |
| Broccoli | Mar 4 | Mar 25 | Apr 8 | Jun 10 – Jul 22 | 60–90 |
| Broccoli Rabe | Mar 4 | Mar 25 | Apr 8 | May 20 – Jun 24 | 40–60 |
| Brussels Sprouts | Mar 4 | Mar 25 | Apr 8 | Jul 8 – Sep 2 | 90–130 |
| Butternut Squash | Mar 11 | Apr 15 | Apr 22 | Jul 22 – Aug 26 | 85–110 |
| Cabbage | Mar 4 | Mar 25 | Apr 8 | Jun 10 – Aug 5 | 60–100 |
| Calabash | Feb 18 | Apr 15 | Apr 22 | Jul 15 – Sep 9 | 80–120 |
| Cardoon | — | — | Apr 22 | Aug 26 – Oct 7 | 120–150 |
| Carrots | — | Mar 25 | — | May 27 – Jul 1 | 60–80 |
| Cauliflower | Mar 4 | Mar 25 | Apr 8 | Jun 3 – Aug 5 | 55–100 |
| Celeriac | Mar 4 | Mar 25 | Apr 8 | Jul 22 – Aug 26 | 100–120 |
| Celery | Mar 4 | Mar 25 | Apr 8 | Jul 1 – Aug 26 | 80–120 |
| Celtuce | Mar 4 | Mar 25 | Apr 8 | Jun 10 – Jul 22 | 60–90 |
| Chard | Mar 4 | Mar 25 | Apr 8 | Jun 3 – Jul 22 | 50–60 |
| Chayote | Feb 18 | Apr 15 | Apr 22 | Aug 26 – Nov 4 | 120–180 |
| Chickpeas | Mar 4 | Mar 25 | Apr 8 | Jul 1 – Aug 12 | 80–110 |
| Chicory | Mar 4 | Mar 25 | Apr 8 | Jun 10 – Jul 22 | 60–85 |
| Chinese Cabbage | Mar 4 | Mar 25 | Apr 8 | Jun 3 – Jul 1 | 50–70 |
| Christmas Lima Beans | Feb 18 | Apr 15 | Apr 22 | Jul 15 – Aug 19 | 80–100 |
| Collard Greens | Mar 4 | Mar 25 | Apr 8 | Jun 3 – Aug 5 | 55–75 |
| Corn | — | Apr 15 | — | Jun 17 – Aug 12 | 60–100 |
| Cowpeas | — | Apr 15 | — | Jun 17 – Jul 29 | 60–90 |
| Cress | Mar 4 | Mar 25 | Apr 8 | Apr 22 – May 13 | 14–21 |
| Crookneck Squash | Mar 11 | Apr 15 | Apr 22 | Jun 10 – Jul 8 | 45–60 |
| Crosne | — | Mar 25 | — | Aug 26 – Oct 28 | 150–200 |
| Cucumber | Mar 11 | Apr 15 | Apr 22 | Jun 17 – Aug 12 | 50–70 |
| Daikon | — | Mar 25 | — | May 20 – Jun 17 | 50–70 |
| Delicata Squash | Mar 11 | Apr 15 | Apr 22 | Jul 15 – Aug 19 | 80–100 |
| Edamame | — | Apr 15 | — | Jul 1 – Aug 12 | 75–100 |
| Eggplant | Feb 4 | Apr 15 | Apr 22 | Jul 1 – Sep 2 | 65–85 |
| Endive | Mar 4 | Mar 25 | Apr 8 | May 27 – Jul 1 | 45–65 |
| Escarole | Mar 4 | Mar 25 | Apr 8 | Jun 3 – Jul 1 | 50–70 |
| Fava Beans | Mar 4 | Mar 25 | Apr 8 | Jun 24 – Aug 5 | 75–100 |
| Fennel | Feb 18 | Apr 15 | Apr 22 | Jun 24 – Aug 5 | 60–90 |
| Garlic | — | — | — | — | 90–240 |
| Green Beans | — | Apr 15 | — | Jun 10 – Aug 5 | 50–65 |
| Horseradish | — | — | Apr 22 | Aug 26 – Nov 4 | 120–180 |
| Hot Peppers | Feb 4 | Apr 15 | Apr 22 | Jul 1 – Oct 7 | 70–120 |
| Hubbard Squash | Mar 11 | Apr 15 | Apr 22 | Aug 5 – Sep 9 | 100–120 |
| Jicama | Feb 18 | Apr 15 | Apr 22 | Aug 26 – Nov 4 | 120–180 |
| Kabocha | Mar 11 | Apr 15 | Apr 22 | Jul 22 – Aug 19 | 85–100 |
| Kai Lan | Mar 4 | Mar 25 | Apr 8 | May 27 – Jun 24 | 45–60 |
| Kale | Mar 4 | Mar 25 | Apr 8 | Jun 3 – Jul 29 | 50–70 |
| Kidney Beans | — | Apr 15 | — | Jul 15 – Aug 19 | 85–110 |
| Kohlrabi | Mar 4 | Mar 25 | Apr 8 | May 27 – Jul 1 | 45–65 |
| Komatsuna | Mar 4 | Mar 25 | Apr 8 | May 13 – Jun 17 | 35–50 |
| Leeks | Mar 4 | Mar 25 | Apr 8 | Jul 8 – Sep 23 | 90–150 |
| Lentils | Mar 4 | Mar 25 | Apr 8 | Jul 1 – Aug 12 | 80–110 |
| Lettuce | Mar 4 | Mar 25 | Apr 8 | May 13 – Jul 22 | 30–60 |
| Lima Beans | — | Apr 15 | — | Jun 17 – Jul 29 | 60–90 |
| Loofah | Feb 18 | Apr 15 | Apr 22 | Aug 5 – Oct 7 | 100–150 |
| Luffa | Feb 18 | Apr 15 | Apr 22 | Jul 22 – Oct 7 | 90–150 |
| Mache | Mar 4 | Mar 25 | Apr 8 | May 20 – Jun 24 | 40–60 |
| Malabar Spinach | Feb 18 | Apr 15 | Apr 22 | Jun 17 – Jul 15 | 55–70 |
| Melon | Mar 11 | Apr 15 | Apr 22 | Jul 1 – Aug 19 | 70–100 |
| Microgreens | Mar 4 | Mar 25 | Apr 8 | Apr 15 – May 13 | 7–21 |
| Mitsuba | Mar 4 | Mar 25 | Apr 1 | May 27 – Jul 22 | 50–70 |
| Mizuna | Mar 4 | Mar 25 | Apr 8 | May 13 – Jun 10 | 30–45 |
| Mustard Greens | Mar 4 | Mar 25 | Apr 8 | May 13 – Jul 15 | 30–50 |
| Napa Cabbage | Mar 4 | Mar 25 | Apr 8 | Jun 3 – Jul 8 | 55–75 |
| New Zealand Spinach | Feb 18 | Apr 15 | Apr 22 | Jun 17 – Jul 15 | 55–70 |
| Okra | Feb 18 | Apr 15 | Apr 22 | Jun 17 – Aug 12 | 50–65 |
| Onion | Mar 4 | Mar 25 | Apr 8 | Jul 8 – Aug 26 | 90–120 |
| Pac Choi | Mar 4 | Mar 25 | Apr 8 | May 20 – Jun 17 | 40–55 |
| Parsnip | — | Mar 25 | — | Jul 8 – Aug 19 | 100–130 |
| Patty Pan Squash | Mar 11 | Apr 15 | Apr 22 | Jun 10 – Jul 8 | 45–60 |
| Peas | Mar 4 | Mar 25 | Apr 8 | Jun 3 – Jul 29 | 55–70 |
| Peppers | Feb 4 | Apr 15 | Apr 22 | Jun 24 – Sep 2 | 60–90 |
| Pole Beans | Feb 18 | Apr 15 | Apr 22 | Jun 17 – Aug 12 | 55–70 |
| Potatoes | Feb 18 | Apr 15 | Apr 22 | Jul 1 – Sep 9 | 70–120 |
| Pumpkin | Mar 11 | Apr 15 | Apr 22 | Jul 22 – Sep 9 | 85–120 |
| Purslane | Mar 4 | Mar 25 | Apr 8 | May 20 – Jun 24 | 40–60 |
| Radicchio | Mar 4 | Mar 25 | Apr 8 | Jun 10 – Jul 15 | 60–80 |
| Radish | — | Mar 25 | — | Apr 22 – May 13 | 22–35 |
| Rhubarb | — | — | Apr 29 | — | 365–730 |
| Romanesco | Mar 4 | Mar 25 | Apr 8 | Jun 24 – Aug 5 | 75–100 |
| Rutabaga | — | Mar 25 | — | Jun 17 – Jul 22 | 80–100 |
| Salsify | — | Mar 25 | — | Jul 8 – Aug 19 | 100–130 |
| Savoy Cabbage | Mar 4 | Mar 25 | Apr 8 | Jun 17 – Aug 12 | 70–110 |
| Scallions | Mar 4 | Mar 25 | Apr 8 | Jun 3 – Jul 1 | 50–70 |
| Scarlet Runner Beans | Feb 18 | Apr 15 | Apr 22 | Jun 24 – Jul 29 | 60–80 |
| Shallot | Mar 4 | Mar 25 | Apr 8 | Jul 8 – Aug 26 | 90–120 |
| Shiso | Feb 18 | Apr 15 | Apr 22 | Jun 17 – Aug 12 | 50–70 |
| Snap Peas | Feb 18 | Apr 15 | Apr 22 | Jun 17 – Aug 12 | 55–70 |
| Snow Peas | Mar 4 | Mar 25 | Apr 8 | Jun 3 – Jul 29 | 50–65 |
| Soybeans | — | Apr 15 | — | Jul 8 – Sep 2 | 80–120 |
| Spaghetti Squash | Mar 11 | Apr 15 | Apr 22 | Jul 22 – Aug 19 | 85–100 |
| Spinach | Mar 4 | Mar 25 | Apr 8 | May 13 – Jul 15 | 35–50 |
| Squash (Summer) | Mar 11 | Apr 15 | Apr 22 | Jun 10 – Aug 12 | 45–65 |
| Squash (Winter) | Mar 11 | Apr 15 | Apr 22 | Jul 15 – Sep 9 | 80–120 |
| Sunchoke | — | — | Apr 22 | Aug 12 – Oct 7 | 110–150 |
| Sunflower | Feb 18 | Apr 15 | Apr 22 | Jul 1 – Aug 19 | 70–100 |
| Sweet Corn | — | Apr 15 | — | Jun 17 – Jul 29 | 60–90 |
| Sweet Potatoes | Feb 18 | Apr 15 | Apr 22 | Jul 22 – Sep 9 | 90–120 |
| Tatsoi | Mar 4 | Mar 25 | Apr 8 | May 13 – Jun 17 | 35–50 |
| Tomatillo | Feb 18 | Apr 15 | Apr 22 | Jun 24 – Sep 2 | 60–85 |
| Tomatoes | Feb 18 | Apr 15 | Apr 22 | Jun 24 – Sep 2 | 60–85 |
| Turnip | — | Mar 25 | — | May 6 – Jun 10 | 40–60 |
| Watercress | Mar 4 | Mar 25 | Apr 8 | May 20 – Jun 24 | 40–60 |
| Watermelon | Mar 11 | Apr 15 | Apr 22 | Jul 1 – Aug 19 | 70–100 |
| Wax Beans | — | Apr 15 | — | Jun 10 – Aug 5 | 50–65 |
| Winter Melon | Feb 18 | Apr 15 | Apr 22 | Jul 22 – Sep 9 | 90–120 |
| Yard Long Beans | Feb 18 | Apr 15 | Apr 22 | Jun 17 – Jul 29 | 55–80 |
| Zucchini | Mar 11 | Apr 15 | Apr 22 | Jun 10 – Aug 5 | 45–60 |
🍓 Fruits to Grow in Custer County
31 fruits that grow well in Zone 7a with planting dates for Custer County.
Show all 31 fruits with planting dates
| Plant | Start Indoors | Direct Sow | Transplant | Harvest | Days to Maturity |
|---|---|---|---|---|---|
| Alpine Strawberries | — | — | Apr 29 | Jul 29 – Nov 11 | 90–180 |
| Aronia | — | — | Apr 29 | — | 730–1095 |
| Blackberries | — | — | Apr 29 | — | 365–730 |
| Blueberries | — | — | Apr 29 | — | 730–1095 |
| Boysenberries | — | — | Apr 29 | — | 365–730 |
| Cantaloupe | — | — | Apr 29 | Jul 8 – Aug 12 | 70–90 |
| Che Fruit | — | — | Apr 29 | — | 1095–1825 |
| Cranberries | — | — | Apr 29 | — | 730–1095 |
| Currants | — | — | Apr 29 | — | 730–1095 |
| Elderberries | — | — | Apr 29 | — | 730–1095 |
| Figs | — | — | Apr 29 | — | 730–1825 |
| Goji Berries | — | — | Apr 29 | — | 730–1095 |
| Gooseberries | — | — | Apr 29 | — | 730–1095 |
| Grapes | — | — | Apr 29 | — | 730–1095 |
| Ground Cherry | — | — | Apr 29 | Jul 8 – Sep 2 | 65–80 |
| Hardy Kiwi | — | — | Apr 29 | — | 1095–1825 |
| Haskaps | — | — | Apr 29 | — | 730–1095 |
| Honeydew | — | — | Apr 29 | Jul 22 – Sep 2 | 80–110 |
| Jostaberry | — | — | Apr 29 | — | 730–1095 |
| Kiwi | — | — | Apr 29 | — | 1095–1825 |
| Lingonberries | — | — | Apr 29 | — | 730–1095 |
| Loquat | — | — | Apr 29 | — | 730–1825 |
| Medlar | — | — | Apr 29 | — | 1095–1825 |
| Mulberries | — | — | Apr 29 | — | 730–1825 |
| Pawpaw | — | — | Apr 29 | — | 1095–2555 |
| Persimmon | — | — | Apr 29 | — | 1095–2555 |
| Pomegranate | — | — | Apr 29 | — | 730–1095 |
| Quince | — | — | Apr 29 | — | 1095–1825 |
| Raspberries | — | — | Apr 29 | — | 365–730 |
| Serviceberries | — | — | Apr 29 | — | 730–1095 |
| Strawberries | — | — | Apr 29 | Jul 29 – Dec 9 | 90–365 |
🌿 Herbs to Grow in Custer County
39 herbs that grow well in Zone 7a with planting dates for Custer County.
Show all 39 herbs with planting dates
| Plant | Start Indoors | Direct Sow | Transplant | Harvest | Days to Maturity |
|---|---|---|---|---|---|
| Angelica | Mar 4 | Mar 25 | Apr 1 | — | 365–730 |
| Anise | Mar 4 | Mar 25 | Apr 1 | Jul 1 – Sep 16 | 90–120 |
| Basil | Feb 18 | Apr 15 | Apr 22 | Jun 17 – Aug 19 | 50–75 |
| Bee Balm | — | — | Apr 15 | Jul 15 – Sep 30 | 90–120 |
| Borage | Mar 4 | Mar 25 | Apr 1 | May 27 – Jul 15 | 50–60 |
| Caraway | Mar 4 | Mar 25 | Apr 1 | — | 365–450 |
| Catnip | — | — | Apr 15 | Jun 17 – Aug 19 | 60–80 |
| Chamomile | Mar 4 | Mar 25 | Apr 1 | Jun 3 – Aug 12 | 60–90 |
| Chervil | Mar 4 | Mar 25 | Apr 1 | May 13 – Jul 15 | 40–60 |
| Chives | — | — | Apr 15 | Jun 17 – Aug 26 | 60–90 |
| Cilantro | Mar 4 | Mar 25 | Apr 1 | May 13 – Jul 15 | 40–60 |
| Comfrey | — | — | Apr 15 | Jun 17 – Aug 26 | 60–90 |
| Cumin | Mar 4 | Mar 25 | Apr 1 | Jul 15 – Sep 16 | 100–120 |
| Dill | Mar 4 | Mar 25 | Apr 1 | May 13 – Jul 15 | 40–60 |
| Echinacea | — | — | Apr 15 | Aug 19 – Nov 25 | 120–180 |
| Epazote | Feb 18 | Apr 15 | Apr 22 | Jun 10 – Aug 5 | 45–60 |
| Fennel (herb) | Mar 4 | Mar 25 | Apr 1 | Jun 3 – Aug 12 | 60–90 |
| Feverfew | — | — | Apr 15 | Jul 15 – Sep 30 | 90–120 |
| Garlic Chives | — | — | Apr 15 | Jun 17 – Aug 26 | 60–90 |
| Horehound | — | — | Apr 15 | Jul 1 – Aug 26 | 75–90 |
| Hyssop | — | — | Apr 15 | Jun 24 – Aug 26 | 70–90 |
| Lavender | — | — | Apr 15 | Jul 15 – Nov 25 | 90–200 |
| Lemon Balm | — | — | Apr 15 | Jun 17 – Aug 5 | 60–70 |
| Lemon Thyme | — | — | Apr 15 | Jun 24 – Aug 26 | 70–90 |
| Lovage | — | — | Apr 15 | Jun 24 – Aug 26 | 70–90 |
| Marjoram | — | — | Apr 15 | Jun 17 – Aug 26 | 60–90 |
| Mint | — | — | Apr 15 | Jun 17 – Aug 26 | 60–90 |
| Oregano | — | — | Apr 15 | Jun 17 – Aug 26 | 60–90 |
| Parsley | Mar 4 | Mar 25 | Apr 1 | Jun 3 – Aug 5 | 60–80 |
| Rosemary | — | — | Apr 15 | Jul 8 – Nov 25 | 80–180 |
| Rue | — | — | Apr 15 | Jun 24 – Aug 26 | 70–90 |
| Sage | — | — | Apr 15 | Jul 1 – Aug 26 | 75–90 |
| Savory | — | — | Apr 15 | Jun 10 – Aug 5 | 50–70 |
| Sorrel | Mar 4 | Mar 25 | Apr 1 | May 13 – Jul 15 | 40–60 |
| Tarragon | — | — | Apr 15 | Jun 17 – Aug 26 | 60–90 |
| Thai Basil | Feb 18 | Apr 15 | Apr 22 | Jun 17 – Aug 19 | 50–75 |
| Thyme | — | — | Apr 15 | Jun 24 – Aug 26 | 70–90 |
| Valerian | — | — | Apr 15 | Aug 19 – Nov 25 | 120–180 |
| Yarrow | — | — | Apr 15 | Jul 15 – Sep 30 | 90–120 |
Monthly Planting Guide for Custer County
Gardening Guides & Resources
Helpful guides from The Ultimate Homestead to improve your garden in Custer County.
Frequently Asked Questions
What planting zone is Custer County, OK?
Custer 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 Custer County, OK?
Based on 31 years of NOAA weather station data, the median last spring frost in Custer County falls around April 8. In 8 out of 10 years, last frost lands between March 19 and April 18 — a 29-day window of variability. Use April 18 as your conservative safe-to-plant date for frost-sensitive crops.
When is the first fall frost in Custer County, OK?
The median first fall frost in Custer County arrives around October 31. In cold years it can arrive as early as October 15; in mild years as late as November 16. Harvest or protect frost-sensitive crops — tomatoes, peppers, basil, squash — before this date.
How long is the growing season in Custer County?
Custer County has a frost-free growing season of approximately 206 days. This long season supports multiple succession plantings and warm-season crops that need extended heat, like sweet potatoes and melons.
What is the soil like in Custer County for gardening?
Custer County has predominantly Loam soil with a pH range of 6.5–7.2 and Moderately Well Drained drainage. Most vegetables and herbs grow well with standard composting and seasonal soil amendment.
What is grown commercially in Custer County?
Custer County has commercial agriculture that includes Wheat, Hay, Cattle. These crops reflect the local climate and soil conditions — what succeeds commercially often translates well to home gardens in the same area.
Is Custer County a good location for home gardening?
Custer 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.
Plan Your Garden with Confidence
Get our free Garden Planner — designed to help Custer 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.
