When to Plant Tatsoi in Galveston County, TX
Tatsoi is a compact Asian green forming beautiful rosettes of dark, spoon-shaped leaves with a mild mustard flavor. It is extremely cold-hardy and versatile.
Galveston County, Texas is in USDA Zone 9a. The average last spring frost is February 5 and the first fall frost is December 7, giving you a growing season of approximately 305 days.
At an elevation of 9 feet, Galveston County receives approximately 72.5 inches of rainfall annually with predominantly sandy loam soil. Summer highs average 100°F, so Tatsoi may need afternoon shade and extra watering during peak heat. Sandy soil warms quickly in spring — great for early planting — but Tatsoi will need more frequent watering and organic matter to retain nutrients. Ample rainfall means less supplemental watering, but ensure good drainage to prevent Tatsoi root diseases.
Galveston County Soil Profile
Soil Type
Sandy Loam
Soil pH
5.7-6.5
Drainage
Well Drained
Plant 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 Galveston County
How your county's soil matches Tatsoi's growing requirements.
Soil pH
Your soil pH (5.7–6.5) overlaps with Tatsoi's range (6.0–7.5), though not a perfect match.
Soil Texture
Sandy soil in Galveston County warms quickly in spring but drains fast. Tatsoi will need more frequent watering and regular compost additions to retain nutrients.
Organic Matter
Organic matter is moderate (2.1%). Annual compost additions will help Tatsoi.
How to Plant Tatsoi
Fall planting: Sow 8 weeks before your first frost date for a fall harvest.
Succession Planting Tatsoi
Sow every 4 weeks. Last sowing by Oct 18 to harvest before frost.
For a dedicated fall crop, sow by Oct 12.
Plant Water Budget
Monthly Watering Guide for Tatsoi
Tatsoi needs approximately 1 inches of water per week (4.3" per month). Here's how your county's rainfall compares month by month.
| Month | Tatsoi Needs | Rainfall | You Supplement | Action |
|---|---|---|---|---|
| Jan | — | 2.1" | 0" | ❄️ Dormant |
| Feb | 4.3" | 2.2" | 2.1" | 💧 Light watering |
| Mar | 4.3" | 5.4" | 0" | ✅ Rainfall sufficient |
| Apr | 4.3" | 8.2" | 0" | ✅ Rainfall sufficient |
| May | 4.3" | 10.4" | 0" | ✅ Rainfall sufficient |
| Jun | 4.3" | 10.9" | 0" | ✅ Rainfall sufficient |
| Jul | 4.3" | 8.7" | 0" | ✅ Rainfall sufficient |
| Aug | 4.3" | 8.6" | 0" | ✅ Rainfall sufficient |
| Sep | 4.3" | 6.2" | 0" | ✅ Rainfall sufficient |
| Oct | 4.3" | 5.2" | 0" | ✅ Rainfall sufficient |
| Nov | 4.3" | 2.6" | 1.7" | 💧 Light watering |
| Dec | 4.3" | 1.9" | 2.4" | 🚿 Regular watering |
Water needs are for active growing months only (Feb–Dec in Galveston County). Supplement amounts are based on average rainfall — actual needs vary with temperature, soil, and mulching.
Tatsoi 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.
Tatsoi Planting Timeline — Galveston County, TX
Tatsoi Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Start Indoors | January 8 | Jan 8 – Jan 22 |
| Transplant Outdoors | February 5 | Feb 5 – Feb 19 |
| Direct Sow | January 15 | Jan 15 – Feb 5 |
| Harvest | March 12 | Mar 12 – Apr 16 |
| Fall Sowing | October 12 | Oct 12 – Oct 26 |
Plant 0.5" deep · 6" apart · Rows 12" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | Start Indoors Direct Sow |
| February | Transplant Outdoors Direct Sow |
| March | Harvest |
| April | Harvest |
| May | — |
| June | — |
| July | — |
| August | — |
| September | — |
| October | Fall Sowing |
| November | — |
| December | — |
Growing Conditions
☀️ Sun
Partial Shade (3-6 hours)
💧 Water
1"/week · Only during dry spells
📅 Days to Maturity
35–50 days
🧪 Soil pH
Needs 6–7.5 · Your soil: acceptable
🗺️ USDA Zone
Zone 9a
📆 Growing Season
305 days in Galveston County
Growing Tips for Tatsoi in Galveston County
Direct sow Tatsoi outdoors after February 05 in Galveston County when soil has warmed and frost danger has passed.
Sandy soil in Galveston County dries quickly — mulch Tatsoi with 2-3 inches of straw and water deeply 2-3 times per week rather than lightly every day.
With summer highs reaching 100°F in Galveston County, provide afternoon shade for Tatsoi and water deeply in the morning.
Your generous 306.0-day season in Galveston County allows multiple plantings of Tatsoi. Sow every 17.0 days for continuous harvest.
Common pests for Tatsoi in this region include cabbage worm and flea beetles. Use row covers early in the season and inspect plants weekly.
General growing tips
Direct sow in spring or fall. Tatsoi tolerates frost down to 15F. Harvest outer leaves or cut whole rosettes. Excellent in salads, stir-fries, or lightly wilted.
Companion Planting
Good Companions
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Tatsoi in Other Locations
Frequently Asked Questions
When should I plant Tatsoi in Galveston County, TX?
Galveston County is in Zone 9a with an average last frost of February 5. Plan your Tatsoi planting based on this frost date — see the calendar above for exact timing.
What planting zone is Galveston County, TX?
Galveston County, Texas is in USDA Hardiness Zone 9a. The average last spring frost is February 5 and first fall frost is December 7.
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