Blog

When to Plant Napa Cabbage in Val Verde County, TX

Val Verde County, Texas Zone 8b May

This month in Val Verde County, Texas

Your garden in Val Verde County, Texas is working on a schedule, even when you're not. Here's where you should be this May.

Avg. last frost February 17
Avg. first frost December 7
Soil temp (4") 62°F
Watering Critical
Pest pressure High
Daylight 13.5 hrs
  1. Start harvesting napa cabbage

    The more you pick, the more the plant produces. Letting fruit overripen tells the plant it's time to stop.

Instant PDF download. No spam, unsubscribe any time.

Napa cabbage forms tall, barrel-shaped heads with tender, crinkled leaves and a mild, slightly sweet flavor. It is the primary cabbage used for kimchi.

Val Verde County, Texas is in USDA Zone 8b. The average last spring frost is February 17 and the first fall frost is December 7, giving you a growing season of approximately 293 days.

At an elevation of 3,979 feet, Val Verde County receives approximately 53.1 inches of rainfall annually with predominantly sandy loam soil. Summer highs average 98°F, so Napa Cabbage may need afternoon shade and extra watering during peak heat. Sandy soil warms quickly in spring — great for early planting — but Napa Cabbage will need more frequent watering and organic matter to retain nutrients. Ample rainfall means less supplemental watering, but ensure good drainage to prevent Napa Cabbage root diseases.

Val Verde County, TX (Zone 8b) Year-round
293 days
Last Spring Frost February 17
293 growing days
First Fall Frost December 7

Val Verde County Soil Profile

Soil Type

Sandy Loam

Soil pH

7.7-8.1

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✓ Fits season (201 days to spare)
Start indoors: Jan 8 Transplant: Feb 12 🍅 Harvest: Apr 9 – May 14
Recommended (50%) ✓ Fits season (202 days to spare)
Start indoors: Jan 13 Transplant: Feb 17 🍅 Harvest: Apr 14 – May 19
Safe Start (90%) ✓ Fits season (196 days to spare)
Start indoors: Feb 2 Transplant: Mar 9 🍅 Harvest: May 4 – Jun 8

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 Val Verde County

How your county's soil matches Napa Cabbage's growing requirements.

Soil pH

Your soil pH (7.7–8.1) is more alkaline than Napa Cabbage prefers (6.0–7.5). Add sulfur or peat moss to lower pH.

Soil Texture

Sandy soil in Val Verde County warms quickly in spring but drains fast. Napa Cabbage will need more frequent watering and regular compost additions to retain nutrients.

Organic Matter

Organic matter is low (0.9%). Add 2-3 inches of compost before planting Napa Cabbage.

How to Plant Napa Cabbage

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

Fall planting: Sow 10 weeks before your first frost date for a fall harvest.

Succession Planting Napa Cabbage

6
successive plantings in your 293-day season

Sow every 6.3 weeks. Last sowing by Sep 23 to harvest before frost.

For a dedicated fall crop, sow by Sep 28.

Plant Water Budget

Plant needs
1.5″/week
Rainfall provides
0.8″/week
You supply
0.9″/week
Watering frequency 2-3 times/week
Season total 2,328 gal / 100 sq ft
Drought risk

Water stress score is 8/10 — consider drought-tolerant varieties and mulching

Monthly Watering Guide for Napa Cabbage

Napa Cabbage needs approximately 1.5 inches of water per week (6.5" per month). Here's how your county's rainfall compares month by month.

Month Napa Cabbage Needs Rainfall You Supplement Action
Jan 3.8" 0" ❄️ Dormant
Feb 6.5" 3.1" 3.4" 🚿 Regular watering
Mar 6.5" 2.8" 3.7" 🚿 Regular watering
Apr 6.5" 1.7" 4.8" 🚿 Regular watering
May 6.5" 1.1" 5.4" 🚿 Regular watering
Jun 6.5" 1.7" 4.8" 🚿 Regular watering
Jul 6.5" 9.6" 0" ✅ Rainfall sufficient
Aug 6.5" 11.5" 0" ✅ Rainfall sufficient
Sep 6.5" 6.2" 0.3" 💧 Light watering
Oct 6.5" 4.3" 2.2" 💧 Light watering
Nov 6.5" 3.3" 3.2" 💧 Light watering
Dec 6.5" 4" 2.5" 💧 Light watering

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

Napa Cabbage 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.

Napa Cabbage needs ~1,528 GDD — county provides 6,909 GDD Excellent fit

Napa Cabbage Planting Timeline — Val Verde County, TX

Napa Cabbage Planting Calendar

Activity When Date Range
Start Indoors January 13 Jan 13 – Jan 27
Transplant Outdoors February 17 Feb 17 – Mar 3
Direct Sow February 3 Feb 3 – Feb 24
Harvest April 14 Apr 14 – May 19
Fall Sowing September 28 Sep 28 – Oct 12

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

Month-by-Month Timeline

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

Growing Conditions

☀️ Sun

Partial Shade (3-6 hours)

💧 Water

1.5"/week · 2-3 times/week

📅 Days to Maturity

55–75 days

🧪 Soil pH

Needs 6–7.5 · Your soil: too_alkaline

🗺️ USDA Zone

Zone 8b

📆 Growing Season

293 days in Val Verde County

Growing Tips for Napa Cabbage in Val Verde County

Direct sow Napa Cabbage outdoors after February 17 in Val Verde County when soil has warmed and frost danger has passed.

Sandy soil in Val Verde County dries quickly — mulch Napa Cabbage with 2-3 inches of straw and water deeply 2-3 times per week rather than lightly every day.

With summer highs reaching 98°F in Val Verde County, provide afternoon shade for Napa Cabbage and water deeply in the morning.

Common pests for Napa Cabbage in this region include cabbage worm and flea beetles. Use row covers early in the season and inspect plants weekly.

General growing tips

Best grown as a fall crop. Direct sow in late summer, 60-70 days before first frost. Keep soil evenly moist. Bolt-resistant varieties are available for spring planting.

Companion Planting

Good Companions

Avoid Planting Near

  • Strawberries

Check more plant combinations with our Companion Planting Checker →

Frequently Asked Questions

When should I plant Napa Cabbage in Val Verde County, TX?

Val Verde County is in Zone 8b with an average last frost of February 17. Plan your Napa Cabbage planting based on this frost date — see the calendar above for exact timing.

What planting zone is Val Verde County, TX?

Val Verde County, Texas is in USDA Hardiness Zone 8b. The average last spring frost is February 17 and first fall frost is December 7.

🌱

Your Val Verde County Garden Planner — Free

A 24-page printable planner built for Val Verde 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 Val Verde 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.