Zone-Specific Guide
Grow Choy Sum in Zone 12a
Your complete guide to growing choy sum in USDA Hardiness Zone 12a — planting windows, care tips, and harvest timing.
Winter
🌡️ Zone 12a
🏖️ Shade Cloth
Days to Harvest
35–50
Spacing
6–10"
Method
Direct sow
Season
Winter
When to Plant Choy Sum in Zone 12a
Transplant Outdoors
Nov – Jan
Direct Sow
Nov – Jan
How to Grow Choy Sum in Zone 12a
📋 Key Timing Note
Very marginal for most brassicas. Only try fast varieties in the coolest weeks.
Direct sow seeds between Nov – Jan. Space plants 6–10" apart. Expect to harvest in approximately 35–50 days.
🏖️ Shade Cloth Recommended
In Zone 12a, use 30-50% shade cloth during the hottest months to protect choy sum from heat stress.
Common Pests in Zone 12a
Watch for these pests when growing choy sum in your area.
Frequently Asked Questions
When should I plant Choy Sum in Zone 12a?
Direct sow seeds Nov – Jan.
How far apart should I plant Choy Sum in Zone 12a?
Space choy sum plants 6–10" apart in Zone 12a. This gives them adequate room for airflow and root development.
What pests affect Choy Sum in Zone 12a?
Common pests for choy sum in Zone 12a include flea beetles, aphids. Use companion planting and row covers as first-line defense.
How long until Choy Sum is ready to harvest in Zone 12a?
In Zone 12a, expect choy sum to be ready in approximately 35–50 days from planting. Very marginal for most brassicas. Only try fast varieties in the coolest weeks.