When to Plant Kai Lan in Brooks County, TX
Kai lan (Chinese broccoli) is a brassica grown for its thick, glossy stems and small flower buds. It has a slightly bitter, broccoli-like flavor essential in Cantonese cooking.
Brooks County, Texas is in USDA Zone 9a. The average last spring frost is February 10 and the first fall frost is December 13, giving you a growing season of approximately 306 days.
At an elevation of 2,752 feet, Brooks County receives approximately 64.5 inches of rainfall annually with predominantly loam soil. Summer highs average 104°F, so Kai Lan may need afternoon shade and extra watering during peak heat. Ample rainfall means less supplemental watering, but ensure good drainage to prevent Kai Lan root diseases.
Brooks County Soil Profile
Soil Type
Loam
Soil pH
6.7-7.2
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 Brooks County
How your county's soil matches Kai Lan's growing requirements.
Soil pH
Your soil pH (6.7–7.2) is within Kai Lan's preferred range (6.0–7.5).
Soil Texture
The loam soil in Brooks County is excellent for Kai Lan — good drainage, moisture retention, and nutrient holding capacity.
Drainage
Drainage is adequate for Kai Lan.
Organic Matter
Organic matter is moderate (2.1%). Annual compost additions will help Kai Lan.
How to Plant Kai Lan
Fall planting: Sow 8 weeks before your first frost date for a fall harvest.
Succession Planting Kai Lan
Sow every 5.1 weeks. Last sowing by Oct 14 to harvest before frost.
For a dedicated fall crop, sow by Oct 18.
Plant Water Budget
Monthly Watering Guide for Kai Lan
Kai Lan needs approximately 1 inches of water per week (4.3" per month). Here's how your county's rainfall compares month by month.
| Month | Kai Lan Needs | Rainfall | You Supplement | Action |
|---|---|---|---|---|
| Jan | — | 1.9" | 0" | ❄️ Dormant |
| Feb | 4.3" | 2.5" | 1.8" | 💧 Light watering |
| Mar | 4.3" | 3.6" | 0.7" | 💧 Light watering |
| Apr | 4.3" | 6.1" | 0" | ✅ Rainfall sufficient |
| May | 4.3" | 10.3" | 0" | ✅ Rainfall sufficient |
| Jun | 4.3" | 10.5" | 0" | ✅ Rainfall sufficient |
| Jul | 4.3" | 7.3" | 0" | ✅ Rainfall sufficient |
| Aug | 4.3" | 7.2" | 0" | ✅ Rainfall sufficient |
| Sep | 4.3" | 6" | 0" | ✅ Rainfall sufficient |
| Oct | 4.3" | 4.8" | 0" | ✅ Rainfall sufficient |
| Nov | 4.3" | 2.3" | 2" | 💧 Light watering |
| Dec | 4.3" | 1.8" | 2.5" | 🚿 Regular watering |
Water needs are for active growing months only (Feb–Dec in Brooks County). Supplement amounts are based on average rainfall — actual needs vary with temperature, soil, and mulching.
Kai Lan 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.
Kai Lan Planting Timeline — Brooks County, TX
Kai Lan Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Start Indoors | January 13 | Jan 13 – Jan 27 |
| Transplant Outdoors | February 10 | Feb 10 – Feb 24 |
| Direct Sow | January 20 | Jan 20 – Feb 10 |
| Harvest | March 31 | Mar 31 – Apr 28 |
| Fall Sowing | October 18 | Oct 18 – Nov 1 |
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 | Fall Sowing |
| December | — |
Growing Conditions
☀️ Sun
Full Sun (6-8+ hours)
💧 Water
1"/week · 1-2 times/week
📅 Days to Maturity
45–60 days
🧪 Soil pH
Needs 6–7.5 · Your soil: ideal
🗺️ USDA Zone
Zone 9a
📆 Growing Season
306 days in Brooks County
Growing Tips for Kai Lan in Brooks County
Direct sow Kai Lan outdoors after February 10 in Brooks County when soil has warmed and frost danger has passed.
With summer highs reaching 104°F in Brooks County, provide afternoon shade for Kai Lan and water deeply in the morning.
Your generous 307.0-day season in Brooks County allows multiple plantings of Kai Lan. Sow every 22.0 days for continuous harvest.
Common pests for Kai Lan 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. Harvest when flower buds first appear but before they open. Cut stems at the base to encourage side shoots. Prefers cool weather.
Companion Planting
Good Companions
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Kai Lan in Other Locations
Frequently Asked Questions
When should I plant Kai Lan in Brooks County, TX?
Brooks County is in Zone 9a with an average last frost of February 10. Plan your Kai Lan planting based on this frost date — see the calendar above for exact timing.
What planting zone is Brooks County, TX?
Brooks County, Texas is in USDA Hardiness Zone 9a. The average last spring frost is February 10 and first fall frost is December 13.
Plan Your Garden with Confidence
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