When to plant Mitsuba in Knott County, KY
In Knott County, plant Mitsuba in spring between April 9 and April 30, once soil temps hold above 50°F. Knott County's last frost averages April 23, so most warm-season crops establish quickly once soil holds above 60°F. For a fall crop, sow between August 9 and August 23 — roughly 50–70 days before the first frost on October 18.
When to Plant Mitsuba in Knott County, KY
Your August gardening checklist
Your garden in Knott County, Kentucky is working on a schedule, even when you're not. Here's where you should be this August.
-
Pick mitsuba
If you can't use it all right away, check the food-preservation section of your planner.
-
Sow mitsuba for an autumn harvest
Your first frost is about 10 weeks away — plenty of time for these to mature.
Mitsuba (Japanese parsley) is a shade-loving herb with trefoil leaves and a mild celery-parsley flavor. It is essential in Japanese cuisine for soups, salads, and garnishes.
Knott County, Kentucky is in USDA Zone 7a. The average last spring frost is April 23 and the first fall frost is October 18, giving you a growing season of approximately 178 days.
At an elevation of 2,201 feet, Knott County receives approximately 40.8 inches of rainfall annually with predominantly silt loam soil. Summer highs average 86°F, providing good warmth for Mitsuba during the growing season.
Knott County Soil Profile
Soil Type
Silt Loam
Soil pH
5.4-6.8
Drainage
Well Drained
Mitsuba Planting Risk Windows
Percentages indicate frost risk at transplant. The 70% safe window means there is a 30% chance of frost after transplant — suitable for cold-hardy crops or gardeners with frost protection. The 90% safe window is best for tender plants.
Soil Compatibility in Knott County
How your county's soil matches Mitsuba's growing requirements.
Soil pH
Your soil pH (5.4–6.8) overlaps with Mitsuba's range (6.0–7.0), though not a perfect match.
Soil Texture
The silt loam soil in Knott County is excellent for Mitsuba — good drainage, moisture retention, and nutrient holding capacity.
Organic Matter
Organic matter is moderate (2.5%). Annual compost additions will help Mitsuba.
How to Plant Mitsuba
Fall planting: Sow 10 weeks before your first frost date for a fall harvest.
Succession Planting Mitsuba
Sow every 5.7 weeks. Last sowing by Aug 09 to harvest before frost.
For a dedicated fall crop, sow by Aug 09.
Mitsuba Water Budget
Monthly Watering Guide for Mitsuba
Mitsuba needs approximately 1 inches of water per week (4.3" per month). Here's how your county's rainfall compares month by month.
| Month | Mitsuba Needs | Rainfall | You Supplement | Action |
|---|---|---|---|---|
| Jan | — | 3.2" | 0" | ❄️ Dormant |
| Feb | — | 3.3" | 0" | ❄️ Dormant |
| Mar | — | 4.2" | 0" | ❄️ Dormant |
| Apr | 4.3" | 3.2" | 1.1" | 💧 Light watering |
| May | 4.3" | 3.7" | 0.6" | 💧 Light watering |
| Jun | 4.3" | 3.1" | 1.2" | 💧 Light watering |
| Jul | 4.3" | 4.6" | 0" | ✅ Rainfall sufficient |
| Aug | 4.3" | 3.5" | 0.8" | 💧 Light watering |
| Sep | 4.3" | 3.1" | 1.2" | 💧 Light watering |
| Oct | 4.3" | 2.8" | 1.5" | 💧 Light watering |
| Nov | — | 3.2" | 0" | ❄️ Dormant |
| Dec | — | 3" | 0" | ❄️ Dormant |
Water needs are for active growing months only (Apr–Oct in Knott County). Supplement amounts are based on average rainfall — actual needs vary with temperature, soil, and mulching.
Mitsuba Heat Requirements (GDD)
What are Growing Degree Days (GDD)?
Growing Degree Days measure the total warmth your plants receive during the growing season. Think of it as a "heat bank" — every day above 50°F deposits warmth that helps your plants grow.
Each plant needs a certain amount of accumulated heat to mature. If your county provides more GDD than the plant needs, it's a great fit. If it's close, you may want to choose faster-maturing varieties or start seeds indoors to get a head start.
Mitsuba Planting Timeline — Knott County, KY
Mitsuba Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Start Indoors | March 19 | Mar 19 – Apr 2 |
| Transplant Outdoors | April 16 | Apr 16 – Apr 30 |
| Direct Sow | April 9 | Apr 9 – Apr 30 |
| Harvest | June 11 | Jun 11 – Aug 6 |
| Fall Sowing | August 9 | Aug 9 – Aug 23 |
Plant 0.5" deep · 8" apart · Rows 12" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | — |
| March | Start Indoors |
| April | Start Indoors Transplant Outdoors Direct Sow |
| May | — |
| June | Harvest |
| July | Harvest |
| August | Fall Sowing Harvest |
| September | — |
| October | — |
| November | — |
| December | — |
Growing Conditions
☀️ Sun
Partial Shade (3-6 hours)
💧 Water
1"/week · Only during dry spells
📅 Days to Maturity
50–70 days
🧪 Soil pH
Needs 6–7 · Your soil: acceptable
🗺️ USDA Zone
Zone 7a
📆 Growing Season
178 days in Knott County
Growing Tips for Mitsuba in Knott County
Direct sow Mitsuba outdoors after April 23 in Knott County when soil has warmed and frost danger has passed.
Common pests for Mitsuba in this region include carrot rust fly and parsleyworm. Use row covers early in the season and inspect plants weekly.
General growing tips
Direct sow or start indoors in partial shade. Mitsuba prefers cool, moist conditions. Harvest outer stems as needed. Self-sows readily in shaded garden areas.
Companion Planting
Good Companions
Check more plant combinations with our Companion Planting Checker →
Mitsuba in Other Locations
Frequently Asked Questions
When should I plant Mitsuba in Knott County, KY?
Knott County is in Zone 7a with an average last frost of April 23. Plan your Mitsuba planting based on this frost date — see the calendar above for exact timing.
What planting zone is Knott County, KY?
Knott County, Kentucky is in USDA Hardiness Zone 7a. The average last spring frost is April 23 and first fall frost is October 18.
When should I plant Mitsuba in Knott County, KY?
In Knott County, KY, plant Mitsuba after the last frost (around April 23) and before the first frost (around October 18). Best results when soil holds above 50°F.
What growing zone is Knott County, KY for Mitsuba?
Knott County sits in USDA Zone 7a. Mitsuba grows reliably in zones 4a through 9b, so it's a good fit here.
Can Mitsuba grow in Knott County's climate?
Yes — Mitsuba grows well in Knott County's temperate climate. Knott County averages a 178-day frost-free season, with last frost around April 23 and first frost around October 18.
Your Knott County Garden Planner — Free
A 22-page printable planner built for Knott County (Zone 7a). Planting dates, a month-by-month schedule, harvest log, seed inventory, and succession charts — all dialed in for your exact growing season.