Cimarron County, OK — Planting Guide
Cimarron County is in USDA Zone 6b. The average last spring frost is April 19 and the first fall frost is October 18, giving you a growing season of approximately 182 days.
At an elevation of 1,132 ft, Cimarron County receives approximately 28.5 in of rainfall annually. Summer highs average 89°F with winter lows around 22°F. The predominant soil type is Loam.
Based on 31 years of NOAA climate station data, the last frost date here varies by 27 days year to year — ranging from April 5 in warm years to May 3 in cold years. The growing season is trending longer by about 3.48 days per decade. Cimarron County scores 53/100 (Moderate) on the Microclimate Index.
🌡️ Zone
6b (-5°F to 0°F min)
❄️ Last Frost
April 19
🍂 First Frost
October 18
📅 Growing Season
182 days
⛰️ Elevation
1,132 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 | 4 days | — | None |
| Mar | 1.9 in | 6 days | 2.4 in | High |
| Apr | 2.7 in | 8 days | 1.6 in | High |
| May | 4.5 in | 10 days | — | Low |
| Jun | 5.1 in | 8 days | — | Low |
| Jul | 3.6 in | 8 days | 0.7 in | Moderate |
| Aug | 2.9 in | 7 days | 1.4 in | Moderate |
| Sep | 2.3 in | 5 days | 2 in | High |
| Oct | 1.9 in | 5 days | 2.4 in | High |
| Nov | 0.9 in | 3 days | — | None |
| Dec | 0.7 in | 3 days | — | None |
Annual total: 28.3 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.
Cimarron County Soil Profile
Soil Type
Loam
Soil pH
6.5-7.4
Drainage
Well Drained
Frost Risk Probability
Based on 31 years of NOAA weather station data from 3 stations
Beginners: Plant frost-sensitive crops (tomatoes, peppers, squash) after the "Safe" date on the left. Harvest or cover them before the "Protect by" date on the right. Hardy crops (lettuce, peas, kale) can go in the yellow transition zones.
How to read this table: "Conservative" means you're safe from frost 9 out of 10 years — best for beginners and frost-sensitive crops. "Average year" is the typical date. "Aggressive" means only 1 in 10 years is that warm — experienced gardeners with frost protection can try these dates.
| Planting Strategy | Last Spring Frost | First Fall Frost | Frost-Free Days |
|---|---|---|---|
| Conservative (safest) | May 3 | Nov 1 | 182 days |
| Cautious | Apr 28 | Oct 24 | 179 days |
| Average year | Apr 19 | Oct 18 | 182 days |
| Optimistic | Apr 14 | Oct 12 | 181 days |
| Aggressive (risky) | Apr 5 | Oct 2 | 180 days |
Not very — frost dates can vary by ±27 days year-to-year. Use the "Conservative" row in the table below, and keep row covers handy for surprise late frosts.
Yes — growing seasons are getting longer here (about 3.5 days per decade). Spring is arriving earlier than it used to. Good news for gardeners.
Gardening Difficulty Score
Cimarron County presents some gardening challenges. Choose adapted varieties and plan around frost dates.
Local Gardening Help in Cimarron 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 Cimarron County's climate and soil.
County Extension Office
Cimarron 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 Cimarron County
Finding local nurseries & garden centers in Cimarron County
Why Buy Local
Local nurseries carry plants that are proven to grow in your area. Staff can give you advice specific to Cimarron 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 Cimarron County OK" or "garden center Cimarron 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 Cimarron County OK" or check your extension office and local parks department. Facebook groups like "Cimarron 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
14.5 hours
Summer solstice daylight
Shortest Day
9.5 hours
Winter solstice daylight
Peak Sun Hours
10.1 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 | 9.7 hr | 5.4 hr | Short day |
| February | 10.6 hr | 6 hr | Short day |
| March | 11.7 hr | 7.3 hr | Short day |
| April | 12.9 hr | 7.8 hr | Neutral |
| May | 14 hr | 8.8 hr | Long day |
| June | 14.5 hr | 10.1 hr | Long day |
| July | 14.3 hr | 10 hr | Long day |
| August | 13.4 hr | 9.4 hr | Neutral |
| September | 12.2 hr | 8.5 hr | Neutral |
| October | 11 hr | 7.3 hr | Short day |
| November | 10 hr | 6.1 hr | Short day |
| December | 9.5 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
Jun
Microbial activity peaks when soil is warm.
Active Composting
7 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 | 31°F | 38°F | ❄️ Dormant | ~36 weeks |
| Feb | 34°F | 37°F | ❄️ Dormant | ~36 weeks |
| Mar | 40°F | 43°F | 🐢 Slow | ~24 weeks |
| Apr | 50°F | 51°F | ♻️ Active | ~14 weeks |
| May | 64°F | 61°F | ♻️ Active | ~14 weeks |
| Jun | 75°F | 69°F | 🔥 Peak | ~8 weeks |
| Jul | 81°F | 77°F | 🔥 Peak | ~8 weeks |
| Aug | 81°F | 78°F | 🔥 Peak | ~8 weeks |
| Sep | 74°F | 74°F | 🔥 Peak | ~8 weeks |
| Oct | 64°F | 66°F | ♻️ Active | ~14 weeks |
| Nov | 49°F | 54°F | 🐢 Slow | ~24 weeks |
| Dec | 38°F | 45°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 Cimarron 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 | Apr, May, Jun, Jul, Aug, Sep |
| Japanese beetles | Moderate | Jun, Jul, Aug |
| Squash vine borers | Moderate | Jun, Jul |
| Tomato hornworms | Moderate | Jun, Jul, Aug |
| Cucumber beetles | Low | May, Jun, Jul |
| Stink bugs | Moderate | Jun, Jul, Aug, Sep |
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 Cimarron County
Cover crops protect bare soil, fix nitrogen, suppress weeds, and improve soil structure — with county-specific planting dates.
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 6 | Mar 29 | ✓ Yes | Fixes nitrogen, good for heavy clay soils |
| Crimson clover | Aug 10 | Mar 29 | ✓ Yes | Fixes nitrogen, attracts pollinators in spring |
| Daikon radish | Sep 2 | Apr 5 | — | Deep taproot breaks compaction, excellent for clay soils |
| Hairy vetch | Jul 28 | Apr 5 | ✓ Yes | Excellent nitrogen fixer, good for depleted soils |
| Oats | Sep 6 | Apr 5 | — | Quick biomass, winterkills in cold zones — no spring tillage needed |
| Winter rye | Jul 24 | Mar 29 | — | Suppresses weeds, prevents erosion, breaks up compacted soil |
| Winter wheat | Jul 14 | Apr 5 | — | Erosion control, weed suppression, good biomass |
Spring Cover Crops (3 options) — Build soil before the main growing season
| Crop | Plant By | Terminate | N-Fixing | Soil Benefit |
|---|---|---|---|---|
| Buckwheat | Apr 21 | Aug 23 | — | Rapid growth, attracts pollinators, suppresses weeds |
| Sorghum-sudan grass | Apr 29 | Aug 9 | — | Massive biomass, breaks compaction, suppresses nematodes |
| White clover | Mar 21 | Aug 16 | ✓ 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 13 | Sep 20 | — | Deep roots break compaction, attract pollinators and beneficial insects |
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: 12 mph
Fall: 14 mph Winter: 14 mph
Prevailing wind: S. Windy area — plant a windbreak hedge on the S side of your garden.
Windbreak Benefit
9.1/10
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 (318 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
14,104 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 28.3 inches of rain per year
- A 1,000 sq ft roof can collect roughly 14,104 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 Cimarron County
Soil Type
Loam
Soil pH 6.5–7.4 · Excessively 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
182-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 Cimarron County
108 vegetables that grow well in Zone 6b with planting dates for Cimarron County.
Show all 108 vegetables with planting dates
| Plant | Start Indoors | Direct Sow | Transplant | Harvest | Days to Maturity |
|---|---|---|---|---|---|
| Acorn Squash | Mar 15 | Apr 26 | May 3 | Jul 26 – Aug 30 | 80–100 |
| Amaranth | Feb 22 | Apr 26 | May 3 | Aug 2 – Sep 20 | 90–120 |
| Arugula | Mar 15 | Apr 5 | Apr 19 | May 24 – Jul 26 | 30–50 |
| Asparagus | — | — | May 3 | — | 730–1095 |
| Beets | — | Apr 5 | — | May 31 – Jun 28 | 50–70 |
| Belgian Endive | Mar 15 | Apr 5 | Apr 19 | Aug 9 – Oct 4 | 110–150 |
| Bitter Melon | Feb 22 | Apr 26 | May 3 | Jul 5 – Aug 16 | 60–90 |
| Black Beans | — | Apr 26 | — | Jul 26 – Sep 13 | 90–120 |
| Bok Choy | Mar 15 | Apr 5 | Apr 19 | May 31 – Jul 5 | 40–60 |
| Broccoli | Mar 15 | Apr 5 | Apr 19 | Jun 21 – Aug 2 | 60–90 |
| Broccoli Rabe | Mar 15 | Apr 5 | Apr 19 | May 31 – Jul 5 | 40–60 |
| Brussels Sprouts | Mar 15 | Apr 5 | Apr 19 | Jul 19 – Sep 13 | 90–130 |
| Butternut Squash | Mar 15 | Apr 26 | May 3 | Aug 2 – Sep 6 | 85–110 |
| Cabbage | Mar 15 | Apr 5 | Apr 19 | Jun 21 – Aug 16 | 60–100 |
| Calabash | Feb 22 | Apr 26 | May 3 | Jul 26 – Sep 20 | 80–120 |
| Carrots | — | Apr 5 | — | Jun 7 – Jul 12 | 60–80 |
| Cauliflower | Mar 15 | Apr 5 | Apr 19 | Jun 14 – Aug 16 | 55–100 |
| Celeriac | Mar 15 | Apr 5 | Apr 19 | Aug 2 – Sep 6 | 100–120 |
| Celery | Mar 15 | Apr 5 | Apr 19 | Jul 12 – Sep 6 | 80–120 |
| Celtuce | Mar 15 | Apr 5 | Apr 19 | Jun 21 – Aug 2 | 60–90 |
| Chard | Mar 15 | Apr 5 | Apr 19 | Jun 14 – Aug 2 | 50–60 |
| Chickpeas | Mar 15 | Apr 5 | Apr 19 | Jul 12 – Aug 23 | 80–110 |
| Chicory | Mar 15 | Apr 5 | Apr 19 | Jun 21 – Aug 2 | 60–85 |
| Chinese Cabbage | Mar 15 | Apr 5 | Apr 19 | Jun 14 – Jul 12 | 50–70 |
| Christmas Lima Beans | Feb 22 | Apr 26 | May 3 | Jul 26 – Aug 30 | 80–100 |
| Collard Greens | Mar 15 | Apr 5 | Apr 19 | Jun 14 – Aug 16 | 55–75 |
| Corn | — | Apr 26 | — | Jun 28 – Aug 23 | 60–100 |
| Cowpeas | — | Apr 26 | — | Jun 28 – Aug 9 | 60–90 |
| Cress | Mar 15 | Apr 5 | Apr 19 | May 3 – May 24 | 14–21 |
| Crookneck Squash | Mar 15 | Apr 26 | May 3 | Jun 21 – Jul 19 | 45–60 |
| Crosne | — | Apr 5 | — | Sep 6 – Oct 18 | 150–200 |
| Cucumber | Mar 15 | Apr 26 | May 3 | Jun 28 – Aug 23 | 50–70 |
| Daikon | — | Apr 5 | — | May 31 – Jun 28 | 50–70 |
| Delicata Squash | Mar 15 | Apr 26 | May 3 | Jul 26 – Aug 30 | 80–100 |
| Edamame | — | Apr 26 | — | Jul 12 – Aug 23 | 75–100 |
| Eggplant | Feb 8 | Apr 26 | May 3 | Jul 12 – Sep 13 | 65–85 |
| Endive | Mar 15 | Apr 5 | Apr 19 | Jun 7 – Jul 12 | 45–65 |
| Escarole | Mar 15 | Apr 5 | Apr 19 | Jun 14 – Jul 12 | 50–70 |
| Fava Beans | Mar 15 | Apr 5 | Apr 19 | Jul 5 – Aug 16 | 75–100 |
| Fennel | Feb 22 | Apr 26 | May 3 | Jul 5 – Aug 16 | 60–90 |
| Garlic | — | — | — | — | 90–240 |
| Green Beans | — | Apr 26 | — | Jun 21 – Aug 16 | 50–65 |
| Horseradish | — | — | May 3 | Sep 6 – Nov 15 | 120–180 |
| Hot Peppers | Feb 8 | Apr 26 | May 3 | Jul 12 – Oct 18 | 70–120 |
| Hubbard Squash | Mar 15 | Apr 26 | May 3 | Aug 16 – Sep 20 | 100–120 |
| Kabocha | Mar 15 | Apr 26 | May 3 | Aug 2 – Aug 30 | 85–100 |
| Kai Lan | Mar 15 | Apr 5 | Apr 19 | Jun 7 – Jul 5 | 45–60 |
| Kale | Mar 15 | Apr 5 | Apr 19 | Jun 14 – Aug 9 | 50–70 |
| Kidney Beans | — | Apr 26 | — | Jul 26 – Aug 30 | 85–110 |
| Kohlrabi | Mar 15 | Apr 5 | Apr 19 | Jun 7 – Jul 12 | 45–65 |
| Komatsuna | Mar 15 | Apr 5 | Apr 19 | May 24 – Jun 28 | 35–50 |
| Leeks | Mar 15 | Apr 5 | Apr 19 | Jul 19 – Oct 4 | 90–150 |
| Lentils | Mar 15 | Apr 5 | Apr 19 | Jul 12 – Aug 23 | 80–110 |
| Lettuce | Mar 15 | Apr 5 | Apr 19 | May 24 – Aug 2 | 30–60 |
| Lima Beans | — | Apr 26 | — | Jun 28 – Aug 9 | 60–90 |
| Loofah | Feb 22 | Apr 26 | May 3 | Aug 16 – Oct 18 | 100–150 |
| Luffa | Feb 22 | Apr 26 | May 3 | Aug 2 – Oct 18 | 90–150 |
| Mache | Mar 15 | Apr 5 | Apr 19 | May 31 – Jul 5 | 40–60 |
| Melon | Mar 15 | Apr 26 | May 3 | Jul 12 – Aug 30 | 70–100 |
| Microgreens | Mar 15 | Apr 5 | Apr 19 | Apr 26 – May 24 | 7–21 |
| Mitsuba | Mar 15 | Apr 5 | Apr 12 | Jun 7 – Aug 2 | 50–70 |
| Mizuna | Mar 15 | Apr 5 | Apr 19 | May 24 – Jun 21 | 30–45 |
| Mustard Greens | Mar 15 | Apr 5 | Apr 19 | May 24 – Jul 26 | 30–50 |
| Napa Cabbage | Mar 15 | Apr 5 | Apr 19 | Jun 14 – Jul 19 | 55–75 |
| New Zealand Spinach | Feb 22 | Apr 26 | May 3 | Jun 28 – Jul 26 | 55–70 |
| Okra | Feb 22 | Apr 26 | May 3 | Jun 28 – Aug 23 | 50–65 |
| Onion | Mar 15 | Apr 5 | Apr 19 | Jul 19 – Sep 6 | 90–120 |
| Pac Choi | Mar 15 | Apr 5 | Apr 19 | May 31 – Jun 28 | 40–55 |
| Parsnip | — | Apr 5 | — | Jul 19 – Aug 30 | 100–130 |
| Patty Pan Squash | Mar 15 | Apr 26 | May 3 | Jun 21 – Jul 19 | 45–60 |
| Peas | Mar 15 | Apr 5 | Apr 19 | Jun 14 – Aug 9 | 55–70 |
| Peppers | Feb 8 | Apr 26 | May 3 | Jul 5 – Sep 13 | 60–90 |
| Pole Beans | Feb 22 | Apr 26 | May 3 | Jun 28 – Aug 23 | 55–70 |
| Potatoes | Feb 22 | Apr 26 | May 3 | Jul 12 – Sep 20 | 70–120 |
| Pumpkin | Mar 15 | Apr 26 | May 3 | Aug 2 – Sep 20 | 85–120 |
| Purslane | Mar 15 | Apr 5 | Apr 19 | May 31 – Jul 5 | 40–60 |
| Radicchio | Mar 15 | Apr 5 | Apr 19 | Jun 21 – Jul 26 | 60–80 |
| Radish | — | Apr 5 | — | May 3 – May 24 | 22–35 |
| Rhubarb | — | — | May 10 | — | 365–730 |
| Romanesco | Mar 15 | Apr 5 | Apr 19 | Jul 5 – Aug 16 | 75–100 |
| Rutabaga | — | Apr 5 | — | Jun 28 – Aug 2 | 80–100 |
| Salsify | — | Apr 5 | — | Jul 19 – Aug 30 | 100–130 |
| Savoy Cabbage | Mar 15 | Apr 5 | Apr 19 | Jun 28 – Aug 23 | 70–110 |
| Scallions | Mar 15 | Apr 5 | Apr 19 | Jun 14 – Jul 12 | 50–70 |
| Scarlet Runner Beans | Feb 22 | Apr 26 | May 3 | Jul 5 – Aug 9 | 60–80 |
| Shallot | Mar 15 | Apr 5 | Apr 19 | Jul 19 – Sep 6 | 90–120 |
| Shiso | Mar 1 | Apr 26 | May 3 | Jun 28 – Aug 23 | 50–70 |
| Snap Peas | Feb 22 | Apr 26 | May 3 | Jun 28 – Aug 23 | 55–70 |
| Snow Peas | Mar 15 | Apr 5 | Apr 19 | Jun 14 – Aug 9 | 50–65 |
| Soybeans | — | Apr 26 | — | Jul 19 – Sep 13 | 80–120 |
| Spaghetti Squash | Mar 15 | Apr 26 | May 3 | Aug 2 – Aug 30 | 85–100 |
| Spinach | Mar 15 | Apr 5 | Apr 19 | May 24 – Jul 26 | 35–50 |
| Squash (Summer) | Mar 15 | Apr 26 | May 3 | Jun 21 – Aug 23 | 45–65 |
| Squash (Winter) | Mar 15 | Apr 26 | May 3 | Jul 26 – Sep 20 | 80–120 |
| Sunchoke | — | — | May 3 | Aug 23 – Oct 18 | 110–150 |
| Sunflower | Feb 22 | Apr 26 | May 3 | Jul 12 – Aug 30 | 70–100 |
| Sweet Corn | — | Apr 26 | — | Jun 28 – Aug 9 | 60–90 |
| Sweet Potatoes | Feb 22 | Apr 26 | May 3 | Aug 2 – Sep 20 | 90–120 |
| Tatsoi | Mar 15 | Apr 5 | Apr 19 | May 24 – Jun 28 | 35–50 |
| Tomatillo | Feb 22 | Apr 26 | May 3 | Jul 5 – Sep 13 | 60–85 |
| Tomatoes | Feb 22 | Apr 26 | May 3 | Jul 5 – Sep 13 | 60–85 |
| Turnip | — | Apr 5 | — | May 17 – Jun 21 | 40–60 |
| Watercress | Mar 15 | Apr 5 | Apr 19 | May 31 – Jul 5 | 40–60 |
| Watermelon | Mar 15 | Apr 26 | May 3 | Jul 12 – Aug 30 | 70–100 |
| Wax Beans | — | Apr 26 | — | Jun 21 – Aug 16 | 50–65 |
| Winter Melon | Feb 22 | Apr 26 | May 3 | Aug 2 – Sep 20 | 90–120 |
| Yard Long Beans | Feb 22 | Apr 26 | May 3 | Jun 28 – Aug 9 | 55–80 |
| Zucchini | Mar 15 | Apr 26 | May 3 | Jun 21 – Aug 16 | 45–60 |
🍓 Fruits to Grow in Cimarron County
27 fruits that grow well in Zone 6b with planting dates for Cimarron County.
Show all 27 fruits with planting dates
| Plant | Start Indoors | Direct Sow | Transplant | Harvest | Days to Maturity |
|---|---|---|---|---|---|
| Alpine Strawberries | — | — | May 10 | Aug 9 – Nov 22 | 90–180 |
| Aronia | — | — | May 10 | — | 730–1095 |
| Blackberries | — | — | May 10 | — | 365–730 |
| Blueberries | — | — | May 10 | — | 730–1095 |
| Boysenberries | — | — | May 10 | — | 365–730 |
| Cantaloupe | — | — | May 10 | Jul 19 – Aug 23 | 70–90 |
| Che Fruit | — | — | May 10 | — | 1095–1825 |
| Cranberries | — | — | May 10 | — | 730–1095 |
| Currants | — | — | May 10 | — | 730–1095 |
| Elderberries | — | — | May 10 | — | 730–1095 |
| Goji Berries | — | — | May 10 | — | 730–1095 |
| Gooseberries | — | — | May 10 | — | 730–1095 |
| Grapes | — | — | May 10 | — | 730–1095 |
| Ground Cherry | — | — | May 10 | Jul 19 – Sep 13 | 65–80 |
| Hardy Kiwi | — | — | May 10 | — | 1095–1825 |
| Haskaps | — | — | May 10 | — | 730–1095 |
| Honeydew | — | — | May 10 | Aug 2 – Sep 13 | 80–110 |
| Jostaberry | — | — | May 10 | — | 730–1095 |
| Lingonberries | — | — | May 10 | — | 730–1095 |
| Medlar | — | — | May 10 | — | 1095–1825 |
| Mulberries | — | — | May 10 | — | 730–1825 |
| Pawpaw | — | — | May 10 | — | 1095–2555 |
| Persimmon | — | — | May 10 | — | 1095–2555 |
| Quince | — | — | May 10 | — | 1095–1825 |
| Raspberries | — | — | May 10 | — | 365–730 |
| Serviceberries | — | — | May 10 | — | 730–1095 |
| Strawberries | — | — | May 10 | Aug 9 – Nov 22 | 90–365 |
🌿 Herbs to Grow in Cimarron County
38 herbs that grow well in Zone 6b with planting dates for Cimarron County.
Show all 38 herbs with planting dates
| Plant | Start Indoors | Direct Sow | Transplant | Harvest | Days to Maturity |
|---|---|---|---|---|---|
| Angelica | Mar 15 | Apr 5 | Apr 12 | — | 365–730 |
| Anise | Mar 15 | Apr 5 | Apr 12 | Jul 12 – Sep 27 | 90–120 |
| Basil | Mar 1 | Apr 26 | May 3 | Jun 28 – Aug 30 | 50–75 |
| Bee Balm | — | — | Apr 26 | Jul 26 – Oct 11 | 90–120 |
| Borage | Mar 15 | Apr 5 | Apr 12 | Jun 7 – Jul 26 | 50–60 |
| Caraway | Mar 15 | Apr 5 | Apr 12 | — | 365–450 |
| Catnip | — | — | Apr 26 | Jun 28 – Aug 30 | 60–80 |
| Chamomile | Mar 15 | Apr 5 | Apr 12 | Jun 14 – Aug 23 | 60–90 |
| Chervil | Mar 15 | Apr 5 | Apr 12 | May 24 – Jul 26 | 40–60 |
| Chives | — | — | Apr 26 | Jun 28 – Sep 6 | 60–90 |
| Cilantro | Mar 15 | Apr 5 | Apr 12 | May 24 – Jul 26 | 40–60 |
| Comfrey | — | — | Apr 26 | Jun 28 – Sep 6 | 60–90 |
| Cumin | Mar 15 | Apr 5 | Apr 12 | Jul 26 – Sep 27 | 100–120 |
| Dill | Mar 15 | Apr 5 | Apr 12 | May 24 – Jul 26 | 40–60 |
| Echinacea | — | — | Apr 26 | Aug 30 – Nov 8 | 120–180 |
| Epazote | Mar 1 | Apr 26 | May 3 | Jun 21 – Aug 16 | 45–60 |
| Fennel (herb) | Mar 15 | Apr 5 | Apr 12 | Jun 14 – Aug 23 | 60–90 |
| Feverfew | — | — | Apr 26 | Jul 26 – Oct 11 | 90–120 |
| Garlic Chives | — | — | Apr 26 | Jun 28 – Sep 6 | 60–90 |
| Horehound | — | — | Apr 26 | Jul 12 – Sep 6 | 75–90 |
| Hyssop | — | — | Apr 26 | Jul 5 – Sep 6 | 70–90 |
| Lavender | — | — | Apr 26 | Jul 26 – Nov 8 | 90–200 |
| Lemon Balm | — | — | Apr 26 | Jun 28 – Aug 16 | 60–70 |
| Lemon Thyme | — | — | Apr 26 | Jul 5 – Sep 6 | 70–90 |
| Lovage | — | — | Apr 26 | Jul 5 – Sep 6 | 70–90 |
| Marjoram | — | — | Apr 26 | Jun 28 – Sep 6 | 60–90 |
| Mint | — | — | Apr 26 | Jun 28 – Sep 6 | 60–90 |
| Oregano | — | — | Apr 26 | Jun 28 – Sep 6 | 60–90 |
| Parsley | Mar 15 | Apr 5 | Apr 12 | Jun 14 – Aug 16 | 60–80 |
| Rue | — | — | Apr 26 | Jul 5 – Sep 6 | 70–90 |
| Sage | — | — | Apr 26 | Jul 12 – Sep 6 | 75–90 |
| Savory | — | — | Apr 26 | Jun 21 – Aug 16 | 50–70 |
| Sorrel | Mar 15 | Apr 5 | Apr 12 | May 24 – Jul 26 | 40–60 |
| Tarragon | — | — | Apr 26 | Jun 28 – Sep 6 | 60–90 |
| Thai Basil | Mar 1 | Apr 26 | May 3 | Jun 28 – Aug 30 | 50–75 |
| Thyme | — | — | Apr 26 | Jul 5 – Sep 6 | 70–90 |
| Valerian | — | — | Apr 26 | Aug 30 – Nov 8 | 120–180 |
| Yarrow | — | — | Apr 26 | Jul 26 – Oct 11 | 90–120 |
Monthly Planting Guide for Cimarron County
Gardening Guides & Resources
Helpful guides from The Ultimate Homestead to improve your garden in Cimarron County.
Frequently Asked Questions
What planting zone is Cimarron County, OK?
Cimarron County is in USDA Hardiness Zone 6b. 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 Cimarron County, OK?
Based on 31 years of NOAA weather station data, the median last spring frost in Cimarron County falls around April 19. In 8 out of 10 years, last frost lands between April 5 and May 3 — a 27-day window of variability. Use May 3 as your conservative safe-to-plant date for frost-sensitive crops.
When is the first fall frost in Cimarron County, OK?
The median first fall frost in Cimarron County arrives around October 18. In cold years it can arrive as early as October 2; in mild years as late as November 1. Harvest or protect frost-sensitive crops — tomatoes, peppers, basil, squash — before this date.
How long is the growing season in Cimarron County?
Cimarron County has a frost-free growing season of approximately 182 days. This is enough time for most warm-season crops including tomatoes, peppers, and squash with proper timing. Climate records show the growing season is trending longer by about 3.48 days per decade.
What is the soil like in Cimarron County for gardening?
Cimarron County has predominantly Loam soil with a pH range of 6.5–7.4 and Excessively Drained drainage. Most vegetables and herbs grow well with standard composting and seasonal soil amendment.
What is grown commercially in Cimarron County?
Cimarron County has commercial agriculture that includes Wheat, Cattle, Hay, Sorghum, Soybeans. These crops reflect the local climate and soil conditions — what succeeds commercially often translates well to home gardens in the same area.
Is Cimarron County a good location for home gardening?
Cimarron County scores 53/100 (Moderate) on our Microclimate Index, which combines frost reliability, drought pressure, soil challenge, elevation risk, and long-term climate trend. Conditions here are moderate — most common crops grow well with standard timing and care.
Plan Your Garden with Confidence
Get our free Garden Planner — designed to help Cimarron County gardeners in Zone 6b 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.
