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When to Plant Fennel in Hood County, TX

Hood County, Texas Zone 8b May

Your May planting checklist for Hood County, Texas

May rewards gardeners who work with the weather, not against it. Here's how to stay in step this month in Hood County, Texas.

Avg. last frost March 21
Avg. first frost November 12
Soil temp (4") 67°F
Watering Low
Pest pressure Moderate
Daylight 13.7 hrs
  1. Fire up the seed-starting tray: fennel

    These need a head start before your last frost (March 21). Sow into cells now so you're ready to transplant in a few weeks.

Before June arrives, get these ready
  • First harvests: fennel

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Florence fennel is grown for its swollen bulb-like stem base, which has a mild anise flavor. It is crisp raw in salads and sweet when roasted or braised.

Hood County, Texas is in USDA Zone 8b. The average last spring frost is March 21 and the first fall frost is November 12, giving you a growing season of approximately 236 days.

At an elevation of 1,554 feet, Hood County receives approximately 60.6 inches of rainfall annually with predominantly clay soil. Summer highs average 94°F, providing good warmth for Fennel during the growing season. Clay soil retains moisture well for Fennel, but amend with compost to improve drainage and prevent root rot. Ample rainfall means less supplemental watering, but ensure good drainage to prevent Fennel root diseases.

Hood County, TX (Zone 8b) Long season
236 days
Last Spring Frost March 21
236 growing days
First Fall Frost November 12

Hood County Soil Profile

Soil Type

Clay

Soil pH

7.3-7.6

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✓ Fits season (122 days to spare)
Start indoors: Jan 20 Transplant: Mar 24 🍅 Harvest: May 26 – Jul 7
Recommended (50%) ✓ Fits season (117 days to spare)
Start indoors: Jan 31 Transplant: Apr 4 🍅 Harvest: Jun 6 – Jul 18
Safe Start (90%) ✓ Fits season (111 days to spare)
Start indoors: Feb 23 Transplant: Apr 27 🍅 Harvest: Jun 29 – Aug 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 Hood County

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

Soil pH

Your soil pH (7.3–7.6) is more alkaline than Fennel prefers (5.5–7.0). Add sulfur or peat moss to lower pH.

Soil Texture

Your clay soil in Hood County is workable for Fennel. Add compost annually to improve structure.

Organic Matter

Organic matter is moderate (3.2%). Annual compost additions will help Fennel.

How to Plant Fennel

1"
Planting Depth
15"
Between Plants
24"
Between Rows

Succession Planting Fennel

4
successive plantings in your 236-day season

Sow every 6.9 weeks. Last sowing by Aug 14 to harvest before frost.

Plant Water Budget

Plant needs
0.6″/week
Rainfall provides
1.1″/week
Watering frequency Natural rainfall sufficient
Season total 0 gal / 100 sq ft

Monthly Watering Guide for Fennel

Fennel needs approximately 0.6 inches of water per week (2.6" per month). Here's how your county's rainfall compares month by month.

Month Fennel Needs Rainfall You Supplement Action
Jan 1.7" 0" ❄️ Dormant
Feb 1.9" 0" ❄️ Dormant
Mar 2.6" 3.9" 0" ✅ Rainfall sufficient
Apr 2.6" 6.4" 0" ✅ Rainfall sufficient
May 2.6" 9.1" 0" ✅ Rainfall sufficient
Jun 2.6" 10" 0" ✅ Rainfall sufficient
Jul 2.6" 7.5" 0" ✅ Rainfall sufficient
Aug 2.6" 7.2" 0" ✅ Rainfall sufficient
Sep 2.6" 5.3" 0" ✅ Rainfall sufficient
Oct 2.6" 4.1" 0" ✅ Rainfall sufficient
Nov 2.6" 2.1" 0.5" 💧 Light watering
Dec 1.4" 0" ❄️ Dormant

Water needs are for active growing months only (Mar–Nov in Hood County). Supplement amounts are based on average rainfall — actual needs vary with temperature, soil, and mulching.

Fennel 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.

Fennel needs ~1,538 GDD — county provides 4,838 GDD Excellent fit

Fennel Planting Timeline — Hood County, TX

Fennel Planting Calendar

Activity When Date Range
Start Indoors January 31 Jan 31 – Feb 14
Transplant Outdoors April 4 Apr 4 – Apr 18
Direct Sow March 28 Mar 28 – Apr 18
Harvest June 6 Jun 6 – Jul 18

Plant 1" deep · 15" apart · Rows 24" apart

Month-by-Month Timeline

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

Growing Conditions

☀️ Sun

Full Sun (6-8+ hours)

💧 Water

0.6"/week · Natural rainfall sufficient

📅 Days to Maturity

60–90 days

🧪 Soil pH

Needs 5.5–7 · Your soil: too_alkaline

🗺️ USDA Zone

Zone 8b

📆 Growing Season

236 days in Hood County

Growing Tips for Fennel in Hood County

Direct sow Fennel outdoors after March 21 in Hood County when soil has warmed and frost danger has passed.

With Hood County's clay soil (40% clay), work in 3-4 inches of compost before planting Fennel. Avoid tilling when soil is wet to prevent compaction.

Common pests for Fennel 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 in late summer for fall harvest to reduce bolting. Hill soil around bulbs as they enlarge. Harvest when bulbs are tennis-ball sized before they elongate.

Companion Planting

Good Companions

Avoid Planting Near

  • Tomatoes
  • Peppers
  • Beans

Check more plant combinations with our Companion Planting Checker →

Frequently Asked Questions

When should I plant Fennel in Hood County, TX?

Hood County is in Zone 8b with an average last frost of March 21. Plan your Fennel planting based on this frost date — see the calendar above for exact timing.

What planting zone is Hood County, TX?

Hood County, Texas is in USDA Hardiness Zone 8b. The average last spring frost is March 21 and first fall frost is November 12.

🌱

Your Hood County Garden Planner — Free

A 24-page printable planner built for Hood County (Zone 8b). Planting dates, a month-by-month schedule, harvest log, seed inventory, and succession charts — all dialed in for your exact growing season.

Instant PDF download. No spam, unsubscribe any time.

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

Sources & credits

Every number on this page traces back to a primary horticulture or government data source. Click through to verify.