Rockcastle County, KY — Planting Guide
Rockcastle County is in USDA Zone 6b. The average last spring frost is April 16 and the first fall frost is October 23, giving you a growing season of approximately 190 days.
At an elevation of 1,677 ft, Rockcastle County receives approximately 41.4 in of rainfall annually. Summer highs average 91°F with winter lows around 24°F. The predominant soil type is Silt 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 3 in warm years to May 1 in cold years. The growing season is trending shorter by about 0.86 days per decade. Rockcastle County scores 71/100 (Good) on the Microclimate Index.
🌡️ Zone
6b (-5°F to 0°F min)
❄️ Last Frost
April 16
🍂 First Frost
October 23
📅 Growing Season
190 days
⛰️ Elevation
1,677 ft
🌧️ Annual Rainfall
41.4 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 | 3.1 in | 10 days | — | None |
| Feb | 3.6 in | 9 days | — | None |
| Mar | 4.1 in | 11 days | 0.2 in | Low |
| Apr | 3.4 in | 8 days | 0.9 in | Moderate |
| May | 3 in | 10 days | 1.3 in | Moderate |
| Jun | 3.5 in | 11 days | 0.8 in | Moderate |
| Jul | 3.9 in | 11 days | 0.4 in | Low |
| Aug | 3.8 in | 12 days | 0.5 in | Low |
| Sep | 3.2 in | 8 days | 1.1 in | Moderate |
| Oct | 3.1 in | 6 days | 1.2 in | Moderate |
| Nov | 3.3 in | 8 days | — | None |
| Dec | 3.3 in | 8 days | — | None |
Annual total: 41.3 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.
Rockcastle County Soil Profile
Soil Type
Silt Loam
Soil pH
5.3-6.9
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 1 | Nov 2 | 185 days |
| Cautious | Apr 22 | Oct 28 | 189 days |
| Average year | Apr 16 | Oct 23 | 190 days |
| Optimistic | Apr 8 | Oct 18 | 193 days |
| Aggressive (risky) | Apr 3 | Oct 8 | 188 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.
Slightly — seasons are trending a bit shorter (0.9 days/decade). Stay conservative with planting dates.
Gardening Difficulty Score
Rockcastle County offers good growing conditions. A little planning around frost dates goes a long way.
Local Gardening Help in Rockcastle 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 Rockcastle County's climate and soil.
County Extension Office
Rockcastle County University of Kentucky Cooperative Extension Extension Office
Phone: 859-257-4302
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 Rockcastle County
Finding local nurseries & garden centers in Rockcastle County
Why Buy Local
Local nurseries carry plants that are proven to grow in your area. Staff can give you advice specific to Rockcastle 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 Rockcastle County KY" or "garden center Rockcastle 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 Rockcastle County KY" or check your extension office and local parks department. Facebook groups like "Rockcastle County Gardeners" or "Kentucky 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
14.6 hours
Summer solstice daylight
Shortest Day
9.4 hours
Winter solstice daylight
Peak Sun Hours
8.8 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 | 4.6 hr | Short day |
| February | 10.6 hr | 5.6 hr | Short day |
| March | 11.7 hr | 6.6 hr | Short day |
| April | 13 hr | 7.9 hr | Neutral |
| May | 14 hr | 8.7 hr | Long day |
| June | 14.6 hr | 8.8 hr | Long day |
| July | 14.3 hr | 8 hr | Long day |
| August | 13.4 hr | 7.6 hr | Neutral |
| September | 12.2 hr | 6.8 hr | Neutral |
| October | 11 hr | 7.1 hr | Short day |
| November | 10 hr | 5.4 hr | Short day |
| December | 9.4 hr | 4.6 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 Jun through Oct.
Best Month to Compost
Jun
Microbial activity peaks when soil is warm.
Active Composting
6 months
Solid season. Piles go dormant in winter.
View detailed monthly data
| Month | Soil 4" Deep | Soil 8" Deep | Compost Activity | Time to Finish |
|---|---|---|---|---|
| Jan | 28°F | 37°F | ❄️ Dormant | ~36 weeks |
| Feb | 31°F | 36°F | ❄️ Dormant | ~36 weeks |
| Mar | 38°F | 42°F | ❄️ Dormant | ~36 weeks |
| Apr | 50°F | 50°F | 🐢 Slow | ~24 weeks |
| May | 60°F | 59°F | ♻️ Active | ~14 weeks |
| Jun | 71°F | 67°F | 🔥 Peak | ~8 weeks |
| Jul | 78°F | 73°F | 🔥 Peak | ~8 weeks |
| Aug | 79°F | 77°F | 🔥 Peak | ~8 weeks |
| Sep | 74°F | 73°F | 🔥 Peak | ~8 weeks |
| Oct | 63°F | 62°F | ♻️ Active | ~14 weeks |
| Nov | 47°F | 53°F | 🐢 Slow | ~24 weeks |
| Dec | 35°F | 42°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 Rockcastle 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
Moderate — watch for mildew and blight during wet periods.
Seasonal Risk
View 6 common pests in your area
| Pest | Risk Level | Peak Months |
|---|---|---|
| Aphids | High | Apr, May, Jun, Jul, Aug, Sep |
| Japanese beetles | High | Jun, Jul, Aug |
| Squash vine borers | Moderate | Jun, Jul |
| Tomato hornworms | Moderate | Jun, Jul, Aug |
| Cucumber beetles | Moderate | May, Jun, Jul |
| Stink bugs | Moderate | Jun, Jul, Aug, Sep |
Organic pest management tips
- Use row covers on susceptible crops during peak pest months
- Apply neem oil preventatively every 7-14 days during active pest season
- Interplant with strong-scented herbs (basil, marigold) to confuse pests
- Hand-pick larger pests (beetles, caterpillars) in early morning when they're sluggish
- Practice crop rotation — never plant the same family in the same spot within 3 years
Cover Crops for Rockcastle 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 21 | Apr 2 | ✓ Yes | Fixes nitrogen, good for heavy clay soils |
| Crimson clover | Aug 11 | Apr 2 | ✓ Yes | Fixes nitrogen, attracts pollinators in spring |
| Daikon radish | Sep 6 | Apr 2 | — | Deep taproot breaks compaction, excellent for clay soils |
| Hairy vetch | Aug 7 | Apr 2 | ✓ Yes | Excellent nitrogen fixer, good for depleted soils |
| Oats | Sep 21 | Apr 2 | — | Quick biomass, winterkills in cold zones — no spring tillage needed |
| Winter rye | Aug 2 | Apr 2 | — | Suppresses weeds, prevents erosion, breaks up compacted soil |
| Winter wheat | Jul 27 | Apr 2 | — | 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 25 | Aug 28 | — | Rapid growth, attracts pollinators, suppresses weeds |
| Sorghum-sudan grass | Apr 23 | Aug 28 | — | Massive biomass, breaks compaction, suppresses nematodes |
| White clover | Mar 19 | Aug 14 | ✓ 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 15 | Sep 25 | — | 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: 8 mph Summer: 7 mph
Fall: 9 mph Winter: 10 mph
Prevailing wind: SW. Moderate wind — consider a temporary windbreak for young seedlings.
Windbreak Benefit
3/10
Low need — wind is not a major factor in your garden planning.
Frost Pocket Risk
Moderate
Some terrain variation (556 ft range). Garden on slopes or higher ground if possible to avoid late-season frost pockets.
Rainwater Harvesting Potential
How much water you can collect, when to collect it, and what size system you need for your garden.
Annual Collection
20,583 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 750 gal tank.
Legal Status
Unrestricted
Rainwater harvesting is fully legal in your state with no restrictions.
Best Collection Months
Feb, Mar, Jul, Aug
Highest rainfall months — your barrels will fill up quickly during these months.
Months to Draw From Storage
Jan, May, Oct
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 41.3 inches of rain per year
- A 1,000 sq ft roof can collect roughly 20,583 gallons annually
- Rainwater harvesting is fully legal in your state
- Stock up on stored water before your dry season (Jan, May, Oct)
- Use a first-flush diverter to keep roof debris out of your collection
Soil & Growing Conditions in Rockcastle County
Soil Type
Silt Loam
Soil pH 5.3–6.9 · Moderately Well Drained drainage
Good candidate for raised beds to maximise drainage and extend the season.
Watering Needs
Drought stress: 1.5/10
Rockcastle County has very low drought pressure. Natural rainfall usually meets garden needs — water only during extended dry spells.
Season Tips
190-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 Rockcastle County
108 vegetables that grow well in Zone 6b with planting dates for Rockcastle County.
Show all 108 vegetables with planting dates
| Plant | Start Indoors | Direct Sow | Transplant | Harvest | Days to Maturity |
|---|---|---|---|---|---|
| Acorn Squash | Mar 12 | Apr 23 | Apr 30 | Jul 23 – Aug 27 | 80–100 |
| Amaranth | Feb 19 | Apr 23 | Apr 30 | Jul 30 – Sep 17 | 90–120 |
| Arugula | Mar 12 | Apr 2 | Apr 16 | May 21 – Jul 23 | 30–50 |
| Asparagus | — | — | Apr 30 | — | 730–1095 |
| Beets | — | Apr 2 | — | May 28 – Jun 25 | 50–70 |
| Belgian Endive | Mar 12 | Apr 2 | Apr 16 | Aug 6 – Oct 1 | 110–150 |
| Bitter Melon | Feb 19 | Apr 23 | Apr 30 | Jul 2 – Aug 13 | 60–90 |
| Black Beans | — | Apr 23 | — | Jul 23 – Sep 10 | 90–120 |
| Bok Choy | Mar 12 | Apr 2 | Apr 16 | May 28 – Jul 2 | 40–60 |
| Broccoli | Mar 12 | Apr 2 | Apr 16 | Jun 18 – Jul 30 | 60–90 |
| Broccoli Rabe | Mar 12 | Apr 2 | Apr 16 | May 28 – Jul 2 | 40–60 |
| Brussels Sprouts | Mar 12 | Apr 2 | Apr 16 | Jul 16 – Sep 10 | 90–130 |
| Butternut Squash | Mar 12 | Apr 23 | Apr 30 | Jul 30 – Sep 3 | 85–110 |
| Cabbage | Mar 12 | Apr 2 | Apr 16 | Jun 18 – Aug 13 | 60–100 |
| Calabash | Feb 19 | Apr 23 | Apr 30 | Jul 23 – Sep 17 | 80–120 |
| Carrots | — | Apr 2 | — | Jun 4 – Jul 9 | 60–80 |
| Cauliflower | Mar 12 | Apr 2 | Apr 16 | Jun 11 – Aug 13 | 55–100 |
| Celeriac | Mar 12 | Apr 2 | Apr 16 | Jul 30 – Sep 3 | 100–120 |
| Celery | Mar 12 | Apr 2 | Apr 16 | Jul 9 – Sep 3 | 80–120 |
| Celtuce | Mar 12 | Apr 2 | Apr 16 | Jun 18 – Jul 30 | 60–90 |
| Chard | Mar 12 | Apr 2 | Apr 16 | Jun 11 – Jul 30 | 50–60 |
| Chickpeas | Mar 12 | Apr 2 | Apr 16 | Jul 9 – Aug 20 | 80–110 |
| Chicory | Mar 12 | Apr 2 | Apr 16 | Jun 18 – Jul 30 | 60–85 |
| Chinese Cabbage | Mar 12 | Apr 2 | Apr 16 | Jun 11 – Jul 9 | 50–70 |
| Christmas Lima Beans | Feb 19 | Apr 23 | Apr 30 | Jul 23 – Aug 27 | 80–100 |
| Collard Greens | Mar 12 | Apr 2 | Apr 16 | Jun 11 – Aug 13 | 55–75 |
| Corn | — | Apr 23 | — | Jun 25 – Aug 20 | 60–100 |
| Cowpeas | — | Apr 23 | — | Jun 25 – Aug 6 | 60–90 |
| Cress | Mar 12 | Apr 2 | Apr 16 | Apr 30 – May 21 | 14–21 |
| Crookneck Squash | Mar 12 | Apr 23 | Apr 30 | Jun 18 – Jul 16 | 45–60 |
| Crosne | — | Apr 2 | — | Sep 3 – Oct 15 | 150–200 |
| Cucumber | Mar 12 | Apr 23 | Apr 30 | Jun 25 – Aug 20 | 50–70 |
| Daikon | — | Apr 2 | — | May 28 – Jun 25 | 50–70 |
| Delicata Squash | Mar 12 | Apr 23 | Apr 30 | Jul 23 – Aug 27 | 80–100 |
| Edamame | — | Apr 23 | — | Jul 9 – Aug 20 | 75–100 |
| Eggplant | Feb 5 | Apr 23 | Apr 30 | Jul 9 – Sep 10 | 65–85 |
| Endive | Mar 12 | Apr 2 | Apr 16 | Jun 4 – Jul 9 | 45–65 |
| Escarole | Mar 12 | Apr 2 | Apr 16 | Jun 11 – Jul 9 | 50–70 |
| Fava Beans | Mar 12 | Apr 2 | Apr 16 | Jul 2 – Aug 13 | 75–100 |
| Fennel | Feb 19 | Apr 23 | Apr 30 | Jul 2 – Aug 13 | 60–90 |
| Garlic | — | — | — | — | 90–240 |
| Green Beans | — | Apr 23 | — | Jun 18 – Aug 13 | 50–65 |
| Horseradish | — | — | Apr 30 | Sep 3 – Nov 12 | 120–180 |
| Hot Peppers | Feb 5 | Apr 23 | Apr 30 | Jul 9 – Oct 15 | 70–120 |
| Hubbard Squash | Mar 12 | Apr 23 | Apr 30 | Aug 13 – Sep 17 | 100–120 |
| Kabocha | Mar 12 | Apr 23 | Apr 30 | Jul 30 – Aug 27 | 85–100 |
| Kai Lan | Mar 12 | Apr 2 | Apr 16 | Jun 4 – Jul 2 | 45–60 |
| Kale | Mar 12 | Apr 2 | Apr 16 | Jun 11 – Aug 6 | 50–70 |
| Kidney Beans | — | Apr 23 | — | Jul 23 – Aug 27 | 85–110 |
| Kohlrabi | Mar 12 | Apr 2 | Apr 16 | Jun 4 – Jul 9 | 45–65 |
| Komatsuna | Mar 12 | Apr 2 | Apr 16 | May 21 – Jun 25 | 35–50 |
| Leeks | Mar 12 | Apr 2 | Apr 16 | Jul 16 – Oct 1 | 90–150 |
| Lentils | Mar 12 | Apr 2 | Apr 16 | Jul 9 – Aug 20 | 80–110 |
| Lettuce | Mar 12 | Apr 2 | Apr 16 | May 21 – Jul 30 | 30–60 |
| Lima Beans | — | Apr 23 | — | Jun 25 – Aug 6 | 60–90 |
| Loofah | Feb 19 | Apr 23 | Apr 30 | Aug 13 – Oct 15 | 100–150 |
| Luffa | Feb 19 | Apr 23 | Apr 30 | Jul 30 – Oct 15 | 90–150 |
| Mache | Mar 12 | Apr 2 | Apr 16 | May 28 – Jul 2 | 40–60 |
| Melon | Mar 12 | Apr 23 | Apr 30 | Jul 9 – Aug 27 | 70–100 |
| Microgreens | Mar 12 | Apr 2 | Apr 16 | Apr 23 – May 21 | 7–21 |
| Mitsuba | Mar 12 | Apr 2 | Apr 9 | Jun 4 – Jul 30 | 50–70 |
| Mizuna | Mar 12 | Apr 2 | Apr 16 | May 21 – Jun 18 | 30–45 |
| Mustard Greens | Mar 12 | Apr 2 | Apr 16 | May 21 – Jul 23 | 30–50 |
| Napa Cabbage | Mar 12 | Apr 2 | Apr 16 | Jun 11 – Jul 16 | 55–75 |
| New Zealand Spinach | Feb 19 | Apr 23 | Apr 30 | Jun 25 – Jul 23 | 55–70 |
| Okra | Feb 19 | Apr 23 | Apr 30 | Jun 25 – Aug 20 | 50–65 |
| Onion | Mar 12 | Apr 2 | Apr 16 | Jul 16 – Sep 3 | 90–120 |
| Pac Choi | Mar 12 | Apr 2 | Apr 16 | May 28 – Jun 25 | 40–55 |
| Parsnip | — | Apr 2 | — | Jul 16 – Aug 27 | 100–130 |
| Patty Pan Squash | Mar 12 | Apr 23 | Apr 30 | Jun 18 – Jul 16 | 45–60 |
| Peas | Mar 12 | Apr 2 | Apr 16 | Jun 11 – Aug 6 | 55–70 |
| Peppers | Feb 5 | Apr 23 | Apr 30 | Jul 2 – Sep 10 | 60–90 |
| Pole Beans | Feb 19 | Apr 23 | Apr 30 | Jun 25 – Aug 20 | 55–70 |
| Potatoes | Feb 19 | Apr 23 | Apr 30 | Jul 9 – Sep 17 | 70–120 |
| Pumpkin | Mar 12 | Apr 23 | Apr 30 | Jul 30 – Sep 17 | 85–120 |
| Purslane | Mar 12 | Apr 2 | Apr 16 | May 28 – Jul 2 | 40–60 |
| Radicchio | Mar 12 | Apr 2 | Apr 16 | Jun 18 – Jul 23 | 60–80 |
| Radish | — | Apr 2 | — | Apr 30 – May 21 | 22–35 |
| Rhubarb | — | — | May 7 | — | 365–730 |
| Romanesco | Mar 12 | Apr 2 | Apr 16 | Jul 2 – Aug 13 | 75–100 |
| Rutabaga | — | Apr 2 | — | Jun 25 – Jul 30 | 80–100 |
| Salsify | — | Apr 2 | — | Jul 16 – Aug 27 | 100–130 |
| Savoy Cabbage | Mar 12 | Apr 2 | Apr 16 | Jun 25 – Aug 20 | 70–110 |
| Scallions | Mar 12 | Apr 2 | Apr 16 | Jun 11 – Jul 9 | 50–70 |
| Scarlet Runner Beans | Feb 19 | Apr 23 | Apr 30 | Jul 2 – Aug 6 | 60–80 |
| Shallot | Mar 12 | Apr 2 | Apr 16 | Jul 16 – Sep 3 | 90–120 |
| Shiso | Feb 26 | Apr 23 | Apr 30 | Jun 25 – Aug 20 | 50–70 |
| Snap Peas | Feb 19 | Apr 23 | Apr 30 | Jun 25 – Aug 20 | 55–70 |
| Snow Peas | Mar 12 | Apr 2 | Apr 16 | Jun 11 – Aug 6 | 50–65 |
| Soybeans | — | Apr 23 | — | Jul 16 – Sep 10 | 80–120 |
| Spaghetti Squash | Mar 12 | Apr 23 | Apr 30 | Jul 30 – Aug 27 | 85–100 |
| Spinach | Mar 12 | Apr 2 | Apr 16 | May 21 – Jul 23 | 35–50 |
| Squash (Summer) | Mar 12 | Apr 23 | Apr 30 | Jun 18 – Aug 20 | 45–65 |
| Squash (Winter) | Mar 12 | Apr 23 | Apr 30 | Jul 23 – Sep 17 | 80–120 |
| Sunchoke | — | — | Apr 30 | Aug 20 – Oct 15 | 110–150 |
| Sunflower | Feb 19 | Apr 23 | Apr 30 | Jul 9 – Aug 27 | 70–100 |
| Sweet Corn | — | Apr 23 | — | Jun 25 – Aug 6 | 60–90 |
| Sweet Potatoes | Feb 19 | Apr 23 | Apr 30 | Jul 30 – Sep 17 | 90–120 |
| Tatsoi | Mar 12 | Apr 2 | Apr 16 | May 21 – Jun 25 | 35–50 |
| Tomatillo | Feb 19 | Apr 23 | Apr 30 | Jul 2 – Sep 10 | 60–85 |
| Tomatoes | Feb 19 | Apr 23 | Apr 30 | Jul 2 – Sep 10 | 60–85 |
| Turnip | — | Apr 2 | — | May 14 – Jun 18 | 40–60 |
| Watercress | Mar 12 | Apr 2 | Apr 16 | May 28 – Jul 2 | 40–60 |
| Watermelon | Mar 12 | Apr 23 | Apr 30 | Jul 9 – Aug 27 | 70–100 |
| Wax Beans | — | Apr 23 | — | Jun 18 – Aug 13 | 50–65 |
| Winter Melon | Feb 19 | Apr 23 | Apr 30 | Jul 30 – Sep 17 | 90–120 |
| Yard Long Beans | Feb 19 | Apr 23 | Apr 30 | Jun 25 – Aug 6 | 55–80 |
| Zucchini | Mar 12 | Apr 23 | Apr 30 | Jun 18 – Aug 13 | 45–60 |
🍓 Fruits to Grow in Rockcastle County
27 fruits that grow well in Zone 6b with planting dates for Rockcastle County.
Show all 27 fruits with planting dates
| Plant | Start Indoors | Direct Sow | Transplant | Harvest | Days to Maturity |
|---|---|---|---|---|---|
| Alpine Strawberries | — | — | May 7 | Aug 6 – Nov 19 | 90–180 |
| Aronia | — | — | May 7 | — | 730–1095 |
| Blackberries | — | — | May 7 | — | 365–730 |
| Blueberries | — | — | May 7 | — | 730–1095 |
| Boysenberries | — | — | May 7 | — | 365–730 |
| Cantaloupe | — | — | May 7 | Jul 16 – Aug 20 | 70–90 |
| Che Fruit | — | — | May 7 | — | 1095–1825 |
| Cranberries | — | — | May 7 | — | 730–1095 |
| Currants | — | — | May 7 | — | 730–1095 |
| Elderberries | — | — | May 7 | — | 730–1095 |
| Goji Berries | — | — | May 7 | — | 730–1095 |
| Gooseberries | — | — | May 7 | — | 730–1095 |
| Grapes | — | — | May 7 | — | 730–1095 |
| Ground Cherry | — | — | May 7 | Jul 16 – Sep 10 | 65–80 |
| Hardy Kiwi | — | — | May 7 | — | 1095–1825 |
| Haskaps | — | — | May 7 | — | 730–1095 |
| Honeydew | — | — | May 7 | Jul 30 – Sep 10 | 80–110 |
| Jostaberry | — | — | May 7 | — | 730–1095 |
| Lingonberries | — | — | May 7 | — | 730–1095 |
| Medlar | — | — | May 7 | — | 1095–1825 |
| Mulberries | — | — | May 7 | — | 730–1825 |
| Pawpaw | — | — | May 7 | — | 1095–2555 |
| Persimmon | — | — | May 7 | — | 1095–2555 |
| Quince | — | — | May 7 | — | 1095–1825 |
| Raspberries | — | — | May 7 | — | 365–730 |
| Serviceberries | — | — | May 7 | — | 730–1095 |
| Strawberries | — | — | May 7 | Aug 6 – Nov 19 | 90–365 |
🌿 Herbs to Grow in Rockcastle County
38 herbs that grow well in Zone 6b with planting dates for Rockcastle County.
Show all 38 herbs with planting dates
| Plant | Start Indoors | Direct Sow | Transplant | Harvest | Days to Maturity |
|---|---|---|---|---|---|
| Angelica | Mar 12 | Apr 2 | Apr 9 | — | 365–730 |
| Anise | Mar 12 | Apr 2 | Apr 9 | Jul 9 – Sep 24 | 90–120 |
| Basil | Feb 26 | Apr 23 | Apr 30 | Jun 25 – Aug 27 | 50–75 |
| Bee Balm | — | — | Apr 23 | Jul 23 – Oct 8 | 90–120 |
| Borage | Mar 12 | Apr 2 | Apr 9 | Jun 4 – Jul 23 | 50–60 |
| Caraway | Mar 12 | Apr 2 | Apr 9 | — | 365–450 |
| Catnip | — | — | Apr 23 | Jun 25 – Aug 27 | 60–80 |
| Chamomile | Mar 12 | Apr 2 | Apr 9 | Jun 11 – Aug 20 | 60–90 |
| Chervil | Mar 12 | Apr 2 | Apr 9 | May 21 – Jul 23 | 40–60 |
| Chives | — | — | Apr 23 | Jun 25 – Sep 3 | 60–90 |
| Cilantro | Mar 12 | Apr 2 | Apr 9 | May 21 – Jul 23 | 40–60 |
| Comfrey | — | — | Apr 23 | Jun 25 – Sep 3 | 60–90 |
| Cumin | Mar 12 | Apr 2 | Apr 9 | Jul 23 – Sep 24 | 100–120 |
| Dill | Mar 12 | Apr 2 | Apr 9 | May 21 – Jul 23 | 40–60 |
| Echinacea | — | — | Apr 23 | Aug 27 – Nov 5 | 120–180 |
| Epazote | Feb 26 | Apr 23 | Apr 30 | Jun 18 – Aug 13 | 45–60 |
| Fennel (herb) | Mar 12 | Apr 2 | Apr 9 | Jun 11 – Aug 20 | 60–90 |
| Feverfew | — | — | Apr 23 | Jul 23 – Oct 8 | 90–120 |
| Garlic Chives | — | — | Apr 23 | Jun 25 – Sep 3 | 60–90 |
| Horehound | — | — | Apr 23 | Jul 9 – Sep 3 | 75–90 |
| Hyssop | — | — | Apr 23 | Jul 2 – Sep 3 | 70–90 |
| Lavender | — | — | Apr 23 | Jul 23 – Nov 5 | 90–200 |
| Lemon Balm | — | — | Apr 23 | Jun 25 – Aug 13 | 60–70 |
| Lemon Thyme | — | — | Apr 23 | Jul 2 – Sep 3 | 70–90 |
| Lovage | — | — | Apr 23 | Jul 2 – Sep 3 | 70–90 |
| Marjoram | — | — | Apr 23 | Jun 25 – Sep 3 | 60–90 |
| Mint | — | — | Apr 23 | Jun 25 – Sep 3 | 60–90 |
| Oregano | — | — | Apr 23 | Jun 25 – Sep 3 | 60–90 |
| Parsley | Mar 12 | Apr 2 | Apr 9 | Jun 11 – Aug 13 | 60–80 |
| Rue | — | — | Apr 23 | Jul 2 – Sep 3 | 70–90 |
| Sage | — | — | Apr 23 | Jul 9 – Sep 3 | 75–90 |
| Savory | — | — | Apr 23 | Jun 18 – Aug 13 | 50–70 |
| Sorrel | Mar 12 | Apr 2 | Apr 9 | May 21 – Jul 23 | 40–60 |
| Tarragon | — | — | Apr 23 | Jun 25 – Sep 3 | 60–90 |
| Thai Basil | Feb 26 | Apr 23 | Apr 30 | Jun 25 – Aug 27 | 50–75 |
| Thyme | — | — | Apr 23 | Jul 2 – Sep 3 | 70–90 |
| Valerian | — | — | Apr 23 | Aug 27 – Nov 5 | 120–180 |
| Yarrow | — | — | Apr 23 | Jul 23 – Oct 8 | 90–120 |
Monthly Planting Guide for Rockcastle County
Gardening Guides & Resources
Helpful guides from The Ultimate Homestead to improve your garden in Rockcastle County.
Frequently Asked Questions
What planting zone is Rockcastle County, KY?
Rockcastle 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 Rockcastle County, KY?
Based on 31 years of NOAA weather station data, the median last spring frost in Rockcastle County falls around April 16. In 8 out of 10 years, last frost lands between April 3 and May 1 — a 27-day window of variability. Use May 1 as your conservative safe-to-plant date for frost-sensitive crops.
When is the first fall frost in Rockcastle County, KY?
The median first fall frost in Rockcastle County arrives around October 23. In cold years it can arrive as early as October 8; in mild years as late as November 2. Harvest or protect frost-sensitive crops — tomatoes, peppers, basil, squash — before this date.
How long is the growing season in Rockcastle County?
Rockcastle County has a frost-free growing season of approximately 190 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 shorter by about 0.86 days per decade.
What is the soil like in Rockcastle County for gardening?
Rockcastle County has predominantly Silt Loam soil with a pH range of 5.3–6.9 and Moderately Well Drained drainage. Most vegetables and herbs grow well with standard composting and seasonal soil amendment.
What is grown commercially in Rockcastle County?
Rockcastle County has commercial agriculture that includes Soybeans, Corn, Hay. These crops reflect the local climate and soil conditions — what succeeds commercially often translates well to home gardens in the same area.
Is Rockcastle County a good location for home gardening?
Rockcastle County scores 71/100 (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 Rockcastle 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.
