When to Plant Daikon in Harris County, TX
Daikon is a large, mild Japanese radish that can grow over a foot long. It is excellent for pickling, stir-fries, and as a soil-breaking cover crop.
Harris County, Texas is in USDA Zone 9a. The average last spring frost is February 14 and the first fall frost is December 4, giving you a growing season of approximately 293 days.
At an elevation of 390 feet, Harris County receives approximately 67.7 inches of rainfall annually with predominantly sandy loam soil. Summer highs average 102°F, so Daikon may need afternoon shade and extra watering during peak heat. Sandy soil warms quickly in spring — great for early planting — but Daikon will need more frequent watering and organic matter to retain nutrients. Ample rainfall means less supplemental watering, but ensure good drainage to prevent Daikon root diseases.
Harris County Soil Profile
Soil Type
Sandy Loam
Soil pH
5.3-6.5
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 Harris County
How your county's soil matches Daikon's growing requirements.
Soil pH
Your soil pH (5.3–6.5) overlaps with Daikon's range (5.8–7.0), though not a perfect match.
Soil Texture
Sandy soil in Harris County warms quickly in spring but drains fast. Daikon will need more frequent watering and regular compost additions to retain nutrients.
Organic Matter
Organic matter is moderate (2.2%). Annual compost additions will help Daikon.
How to Plant Daikon
Fall planting: Sow 8 weeks before your first frost date for a fall harvest.
Succession Planting Daikon
Sow every 5.7 weeks. Last sowing by Sep 25 to harvest before frost.
For a dedicated fall crop, sow by Oct 09.
Plant Water Budget
Daikon Planting Timeline — Harris County, TX
Daikon Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Direct Sow | January 24 | Jan 24 – Feb 14 |
| Fall Sowing | October 9 | Oct 9 – Oct 23 |
| Harvest | March 21 | Mar 21 – Apr 18 |
Plant 0.5" deep · 6" apart · Rows 12" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | Direct Sow |
| February | Direct Sow |
| March | Harvest |
| April | Harvest |
| May | — |
| June | — |
| July | — |
| August | — |
| September | — |
| October | Fall Sowing |
| November | — |
| December | — |
Growing Conditions
☀️ Sun
Full Sun (6-8+ hours)
💧 Water
1"/week · Only during dry spells
📅 Days to Maturity
50–70 days
🧪 Soil pH
Needs 5.8–7 · Your soil: acceptable
🗺️ USDA Zone
Zone 9a
📆 Growing Season
293 days in Harris County
Growing Tips for Daikon in Harris County
Direct sow Daikon outdoors after February 14 in Harris County when soil has warmed and frost danger has passed.
Sandy soil in Harris County dries quickly — mulch Daikon with 2-3 inches of straw and water deeply 2-3 times per week rather than lightly every day.
With summer highs reaching 102°F in Harris County, provide afternoon shade for Daikon and water deeply in the morning.
Common pests for Daikon 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 late summer for fall harvest. Loosen soil deeply before planting. Thin seedlings to 6 inches apart. Harvest before hard freeze as exposed shoulders may crack.
Companion Planting
Good Companions
Avoid Planting Near
Level Up Your Garden
Daikon in Other Locations
Frequently Asked Questions
When should I plant Daikon in Harris County, TX?
Harris County is in Zone 9a with an average last frost of February 14. Plan your Daikon planting based on this frost date — see the calendar above for exact timing.
What planting zone is Harris County, TX?
Harris County, Texas is in USDA Hardiness Zone 9a. The average last spring frost is February 14 and first fall frost is December 4.
Plan Your Garden with Confidence
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