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When to plant Mitsuba in Jay, FL

Plant Mitsuba in Jay, when soil hits 50°F — usually February 13. Continue planting through March 6 for the spring crop. A second sowing from September 26 to October 10 extends the harvest into fall.

When to Plant Mitsuba in Jay, FL

Santa Rosa County, Florida Zone 9a July

Santa Rosa County, Florida gardeners: here's your July plan

A quick July briefing for Santa Rosa County, Florida gardeners — what's urgent, what's next, and what can wait.

Avg. last frost March 6
Avg. first frost November 21
Soil temp (4") 89°F
Watering Low
Pest pressure High
Daylight 13.8 hrs

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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.

Jay, Florida is in USDA Zone 9a. The average last spring frost is March 6 and the first fall frost is November 21, giving you a growing season of approximately 260 days.

At an elevation of 104 feet, Santa Rosa County receives approximately 55 inches of rainfall annually with predominantly sand soil. Summer highs average 91°F, providing good warmth for Mitsuba during the growing season. Sandy soil warms quickly in spring — great for early planting — but Mitsuba will need more frequent watering and organic matter to retain nutrients. Ample rainfall means less supplemental watering, but ensure good drainage to prevent Mitsuba root diseases.

Jay, FL (Zone 9a) Long season
260 days
Last Spring Frost March 6
260 growing days
First Fall Frost November 21

Jay Soil Profile

Soil Type

Sand

Soil pH

5.1-5.8

Drainage

Well Drained

Mitsuba Planting Risk Windows

Early Start (70% safe) ✓ Fits season (154 days to spare)
Start indoors: Feb 1 Transplant: Feb 22 🍅 Harvest: Apr 19 – Jun 14
Recommended (50%) ✓ Fits season (155 days to spare)
Start indoors: Feb 6 Transplant: Feb 27 🍅 Harvest: Apr 24 – Jun 19
Safe Start (90%) ✓ Fits season (155 days to spare)
Start indoors: Feb 27 Transplant: Mar 20 🍅 Harvest: May 15 – Jul 10

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 Jay

How your county's soil matches Mitsuba's growing requirements.

Soil pH

Your soil pH (5.1–5.8) is more acidic than Mitsuba prefers (6.0–7.0). Add garden lime to raise pH.

Soil Texture

Sandy soil in Santa Rosa County warms quickly in spring but drains fast. Mitsuba will need more frequent watering and regular compost additions to retain nutrients.

Drainage

Drainage is adequate for Mitsuba.

Organic Matter

Organic matter is low (1.7%). Add 2-3 inches of compost before planting Mitsuba.

How to Plant Mitsuba

0.5"
Planting Depth
8"
Between Plants
12"
Between Rows

Fall planting: Sow 8 weeks before your first frost date for a fall harvest.

Succession Planting Mitsuba

6
successive plantings in your 260-day season

Sow every 5.7 weeks. Last sowing by Sep 12 to harvest before frost.

For a dedicated fall crop, sow by Sep 26.

Mitsuba Water Budget

Plant needs
1.0″/week
Rainfall provides
0.9″/week
You supply
0.5″/week
Watering frequency 1-2 times/week
Season total 1,143 gal / 100 sq ft
Drought risk

Water stress score is 6/10 — consider drought-tolerant varieties and mulching

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 2.9" 0" ❄️ Dormant
Feb 3" 0" ❄️ Dormant
Mar 4.3" 3.1" 1.2" 💧 Light watering
Apr 4.3" 2.3" 2" 💧 Light watering
May 4.3" 3.2" 1.1" 💧 Light watering
Jun 4.3" 7.5" 0" ✅ Rainfall sufficient
Jul 4.3" 7.9" 0" ✅ Rainfall sufficient
Aug 4.3" 8.6" 0" ✅ Rainfall sufficient
Sep 4.3" 7.9" 0" ✅ Rainfall sufficient
Oct 4.3" 4.4" 0" ✅ Rainfall sufficient
Nov 4.3" 2" 2.3" 🚿 Regular watering
Dec 2.3" 0" ❄️ Dormant

Water needs are for active growing months only (Mar–Nov in Santa Rosa 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 needs ~1,095 GDD — county provides 4,745 GDD Excellent fit

Mitsuba Planting Timeline — Jay, FL

Mitsuba Planting Calendar

Activity When Date Range
Start Indoors February 6 Feb 6 – Feb 20
Transplant Outdoors February 27 Feb 27 – Mar 13
Direct Sow February 13 Feb 13 – Mar 6
Harvest April 24 Apr 24 – Jun 19
Fall Sowing September 26 Sep 26 – Oct 10

Plant 0.5" deep · 8" apart · Rows 12" apart

Month-by-Month Timeline

MonthActivities
January
February Start Indoors Transplant Outdoors Direct Sow
March Transplant Outdoors Direct Sow
April Harvest
May Harvest
June Harvest
July
August
September Fall Sowing
October Fall Sowing
November
December

Growing Conditions

☀️ Sun

Partial Shade (3-6 hours)

💧 Water

1"/week · 1-2 times/week

📅 Days to Maturity

50–70 days

🧪 Soil pH

Needs 6–7 · Your soil: too_acidic

🗺️ USDA Zone

Zone 9a

📆 Growing Season

260 days in Santa Rosa County

Growing Tips for Mitsuba in Jay

Direct sow Mitsuba outdoors after March 06 in Santa Rosa County when soil has warmed and frost danger has passed.

Sandy soil in Santa Rosa County dries quickly — mulch Mitsuba with 2-3 inches of straw and water deeply 2-3 times per week rather than lightly every day.

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 →

When should I plant Mitsuba in Jay, FL?

In Jay, FL, plant Mitsuba after the last frost (around March 6) and before the first frost (around November 21). Best results when soil holds above 50°F.

What growing zone is Jay, FL for Mitsuba?

Jay sits in USDA Zone 9a. Mitsuba grows reliably in zones 4a through 9b, so it's a good fit here.

Can Mitsuba grow in Jay's climate?

Yes — Mitsuba grows well in Jay's temperate climate. Jay averages a 260-day frost-free season, with last frost around March 6 and first frost around November 21.

🌱

Your Santa Rosa County Garden Planner — Free

A 22-page printable planner built for Santa Rosa County (Zone 9a). Planting dates, a month-by-month schedule, harvest log, seed inventory, and succession charts — all dialed in for your exact growing season.

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Data sources: USDA Plant Hardiness Zone Map (2023), NOAA 30-Year Climate Normals. Frost dates are based on 50% probability averages for Santa Rosa County, FL. Local conditions may vary. Last updated: July 2026.