Zone-Specific Guide
Grow Choy Sum in Zone 3a
Your complete guide to growing choy sum in USDA Hardiness Zone 3a — planting windows, care tips, and harvest timing.
Summer
🌡️ Zone 3a
Days to Harvest
35–50
Spacing
6–10"
Method
Direct sow
Season
Summer
When to Plant Choy Sum in Zone 3a
Start Indoors
Mar 15 – May 1
Transplant Outdoors
May 1 – Jun 15
How to Grow Choy Sum in Zone 3a
📋 Key Timing Note
Short season. Start indoors and transplant after last frost. Choose fast-maturing varieties. Cool summer temps are actually ideal for these crops.
Space plants 6–10" apart. Expect to harvest in approximately 35–50 days.
Common Pests in Zone 3a
Watch for these pests when growing choy sum in your area.
Frequently Asked Questions
When should I plant Choy Sum in Zone 3a?
Start seeds indoors Mar 15 – May 1. Transplant outdoors May 1 – Jun 15.
How far apart should I plant Choy Sum in Zone 3a?
Space choy sum plants 6–10" apart in Zone 3a. This gives them adequate room for airflow and root development.
What pests affect Choy Sum in Zone 3a?
Common pests for choy sum in Zone 3a 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 3a?
In Zone 3a, expect choy sum to be ready in approximately 35–50 days from planting. Short season. Start indoors and transplant after last frost. Choose fast-maturing varieties. Cool summer temps are actually ideal for these crops.