Growing Garlic in San Francisco: Varieties, Timing, and What to Expect

Garlic is one of the most satisfying crops you can grow in a San Francisco edible garden. It goes in during the fall rainy season, requires very little attention through winter, and comes out of the ground in summer as something genuinely better than anything you'll find at a grocery store.

The Bay Area calendar suits garlic well. We plant in October and November, when the soil is still warm and rain is beginning. We harvest in July, when the lower leaves brown and the upper leaves are still green. In between, garlic mostly takes care of itself.

This guide covers variety selection, planting, care through the season, harvest timing, and curing. It's written for San Francisco conditions specifically.

Choosing a Garlic Variety

Garlic is divided into two main types: softneck and hardneck. Softneck varieties are what you typically see in grocery stores. They store well, produce dense heads with multiple layers of cloves, and can be braided. Hardneck varieties have fewer, larger cloves, more complex flavor, and produce scapes in spring which is a bonus harvest.

Both types perform in Bay Area gardens. Here are the four varieties I recommend to clients:

Chesnok Red is a hardneck variety and a reliable performer in Bay Area gardens. It produces scapes in late spring. Harvest them before they fully unfurl and you'll have a mild, richly flavored ingredient for a few weeks before the main bulb harvest. The flavor is complex and holds up well to roasting or wok stir frying.

Early Italian Purple is a softneck with large heads and attractive purple striping on the outer wrapper. It braids well and stores for several months. If you want garlic that looks as good as it tastes, this is a strong choice.

Susanville is a softneck that performs well in mild winter climates. It's a dependable producer with good storage life and is well suited to the Bay Area's lack of hard freezes.

Inchelium Red is a softneck known for exceptionally large heads and mild, complex flavor. It's one of the best softneck varieties for flavor and a good option if long storage life is a priority.

For most gardens, I recommend planting at least one hardneck for scapes and one softneck for long-term storage. That gives you two distinct harvests and flexibility in how you use what you grow.

Site and Soil Preparation

Garlic needs full sun and well-drained soil. In San Francisco, most garden beds receive some degree of fog and shade, but aim for as much direct sun as you can offer. Six hours is the minimum.

Amend beds with compost before planting. Garlic is a heavy feeder and rewards good soil preparation. If your soil is heavy clay, add compost and consider raising your bed slightly to improve drainage. Garlic sitting in waterlogged soil through a wet winter will rot.

If you want to design an edible garden that makes the most of your site's light, drainage, and microclimate, Fyrn Landscapes offers edible garden design consultations for Bay Area homeowners.

When and How to Plant

Plant garlic in October or November. This is the right window for Bay Area gardens. Planting too late reduces the root development that happens before the bulb begins to size up in spring.

Break heads into individual cloves just before planting. Don't peel them. Select the largest cloves and compost the smallest ones. Larger cloves produce larger heads.

Plant each clove two to three inches deep with the pointed end up and the flat root plate facing down. Space cloves six inches apart. In a raised bed or compact space, four to five inches works for softneck varieties.

Cover with about two inches of mulch after planting to retain moisture and moderate soil temperature through winter.

Care Through the Season

Through winter, garlic needs very little from you. Keep beds weeded and let the rain do the watering. In a dry winter, supplement irrigation to keep soil consistently moist but not saturated.

In early spring, top-dress beds with a balanced organic fertilizer that includes calcium to support leaf growth and bulb formation. Garlic builds its head size during the spring growing window, so soil fertility matters most from February through May.

Hardneck scapes appear in late spring, typically April or May in San Francisco. When the scape has made one loose curl, cut it at the base where it connects to the main stalk. The scape is actually a flower bud. Leaving it on diverts energy from the bulb, towards blooming and forming seed. Scapes are delicious used like green beans in any application.

As summer arrives, reduce irrigation. Garlic is finishing its growth cycle and excess moisture at this stage reduces storage life and promotes rot. When you start to see leaves turning brown at the tips, you can turn off irrigation to the bed entirely.

Harvesting

Harvest timing is one of the most common points of confusion for first-time garlic growers. The standard guidance is to harvest when roughly half the leaves have browned and half are still green. Each green leaf corresponds to a wrapper layer on the bulb. Harvesting too early means thin wrappers and poor storage. Harvesting too late means the wrappers have already deteriorated.

In San Francisco, most garlic is ready in July. Loosen the soil around the bulb with a garden fork before pulling to avoid snapping the stalk.

Curing and Storage

Freshly harvested garlic is not ready to eat or store. Curing is the step most home growers skip or rush, and it significantly affects how long garlic keeps.

Cure bulbs in a dry, shaded spot with good airflow for three to four weeks. A covered porch, garage, or shed works well. Do not wash the bulbs. Lay them flat on a rack or tie them in bundles and hang them.

Garlic is fully cured when the outer wrappers are papery and dry, the stalk feels dry with no moisture when cut, and the neck is tight rather than soft. Trim the roots and stalks and move garlic to cool, dark storage. You can also keep a braid of dried garlic hanging in your kitchen for natural decoration and easy access. Properly cured softneck varieties keep four to six months. Hardneck varieties generally keep two to four months, so use those first.

Set aside your largest, best-formed heads to replant in October. Growing from saved seed garlic adapts varieties to your specific site over time.

A Note on Spring Garlic

For small San Francisco gardens where space is limited, consider dedicating part of your planting to spring garlic. Plant cloves more densely at three to four inches apart and harvest them young, when they look like thick green onions with a mild garlic flavor. Spring garlic is a genuine delicacy, briefly available at farmers markets and expensive when you do find it. Growing your own gives you several weeks of harvest.

This approach frees up bed space in May rather than July, which works well for gardens that need to turn over quickly for summer crops.

Growing Garlic in San Francisco With a Horticulturist

Garlic is a satisfying entry point into edible gardening. A productive edible garden, though, requires thinking about seasonal succession, soil health, microclimate, and irrigation as a whole system.

Fyrn Landscapes offers edible garden design, consulting, and maintenance for Bay Area homeowners. If you'd like support with planning or ongoing care for an edible garden in San Francisco or San Mateo County, reach out here.