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


Garden Help > Vegetables

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Pest management: Leafminers and aphids 

The Basics

When to plant: Sow directly or transplant in spring (February through May) and in early fall (September through October). Vegetable Planting Chart

Harvest window: Outer leaves can be harvested continuously as soon as the plant is well established. Harvest by cutting or breaking away a few of the outer, fully expanded leaves. New leaves develop in the center of the plants. Harvest can continue for months, until the plant bolts (sends up a flower stalk).

Care overview:

  • Chard is closely related to beets and needs similar care
  • Chard seeds are actually seed clusters, so you typically get multiple seedlings from a single seed. Thin to the strongest one.
  • Common chard pests are leafminers, that leave twisting whitish trails on the leaves, and aphids, typically found on the backs of the curling leaves.

Some Recommended Varieties for Santa Clara County*

See our list of Fall Garden Markets for varieties that we have found perform well here. 

*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.



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