Collards are a cool season vegetable grown for their leaves. They do not form a head like cabbage.
When to plant
- Direct seed or transplant Feb–Apr (maybe May) or Sept-Oct (maybe Aug).
- If growing from seed for transplanting, expect six weeks for the plants to be ready.
- Harvest individual leaves after plants are well established, about two months after planting.
- Some people prefer to harvest the younger inner leaves rather than the older, outer leaves.
- Collards tolerate a wide range of warm to cold temperatures, and like many members of the cabbage family, will taste sweeter after a light frost.
- For close plantings (6–12" apart), thin by cutting some plants at the soil level when crowding begins.
- For wider spacing (15–18" apart), harvest lower leaves to allow the plants to continue growing and producing more leaves.
- Collard Greens—Another Loose-Leaf Cabbage Cousin, UC Master Gardeners of Sonoma County
- Collard Greens, Texas A&M, AgriLife Extension
Recommended Varieties for Santa Clara County*
|Georgia Southern, OP||Harvest delicious outer leaves for a constant supply. Cabbage/kale flavor. 24–36" tall. Plant 12–18" apart|
* Many other varieties may also do well here in Santa Clara County. This list is based on UC Master Gardener trials, taste tests, and feedback from local growers.