UC Master Gardeners, Santa Clara County, CA
University of California
UC Master Gardeners, Santa Clara County, CA


Garden Help > Vegetables

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Green glaze collards (Photo: UC Master Gardeners of Monterey County)
Green glaze collards (Photo: UC Master Gardeners of Monterey County)
Pest management: Collards are in the cabbage family, and pests are similar across the family. This group is also known as cole crops or brassicas and includes broccoli, cabbage, and cauliflower.

The Basics

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 window

  • 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.

Care overview

  • 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.

More links

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.

Webmaster Email: webmaster-mgsantaclara@ucanr.edu