Chives in Zone 8A — Northern California

Chives are a fantastic addition to any Northern California garden. Their mild onion flavor elevates everything from scrambled eggs to salads, and they’re incredibly easy to grow in our Mediterranean climate. Plus, the cheerful purple flowers attract pollinators, making your garden even more vibrant.

We NorCal gardeners face dry summers and the occasional water restriction, but don't worry; chives are surprisingly resilient. With our long growing season, stretching from early spring well into the fall, you'll have plenty of time to enjoy fresh chives from your garden.

Starting chives indoors is an option, especially if you're eager to get a head start. Sow seeds indoors from late December through mid January, about eight weeks before you plan to transplant them. Use seed trays filled with a good seed-starting mix, keep them warm, and provide plenty of light, either with a grow light or a sunny windowsill.

Make sure to keep the soil consistently moist by bottom watering, which helps prevent damping off. Honestly, in our area, starting them indoors is only really necessary if you want a super early harvest; direct sowing often works just as well given our mild winters.

If you started your chives indoors, transplant them outdoors from late February through late March, once the soil has warmed up a bit. Before transplanting, harden off your seedlings by gradually exposing them to outdoor conditions for about a week. This helps them adjust to the sun and wind.

Space the plants 8-12 inches apart in a sunny spot with well-drained soil. Keep an eye on the weather; we can still get some unexpected cool snaps in late winter, so protect your seedlings if necessary. You can also skip starting from seed and just buy chive starts from a local nursery or divide existing clumps – much faster!

Direct sowing chives is a simple and effective method in Northern California. Sow seeds directly into the garden from early February through mid August. Choose a spot with full sun to partial shade, and make sure the soil is well-drained.

Keep the soil consistently moist until the seedlings emerge, which can take a couple of weeks. Thin the seedlings to 8-12 inches apart once they're a few inches tall. Just be aware that chives can be slow to establish from seed, so be patient. Getting a head start with transplants or dividing existing clumps is often a quicker route to a plentiful harvest.

Chives need moderate, consistent watering, especially during our dry summers. While they're not as drought-tolerant as some other herbs, they're also not as fussy about perfect drainage. A good rule of thumb is to water deeply once or twice a week, providing about 1 inch of water each time, depending on rainfall.

Use the "finger test" to check the soil moisture: stick your finger about 2 inches deep into the soil; if it feels dry, it's time to water. Watering at the base of the plant is preferable to overhead watering, as it helps prevent fungal diseases in our low-humidity environment.

During hotter periods, you might need to water more frequently. Signs of underwatering include wilting or yellowing leaves, while overwatering can lead to yellowing and mushy stems. Mulching around the base of the plants with straw or wood chips helps retain moisture and keeps the soil cool during those hotter months.

You can expect your first chive harvest from early May through late November, about 80 days after planting. Look for leaves that are at least 6 inches tall and a vibrant green color. To harvest, simply snip the leaves about 1-2 inches above the base of the plant with scissors or garden shears.

Cutting them back encourages new growth, so don't be shy! Harvest regularly to keep your chives producing throughout the growing season. As the first frost approaches around mid- November, you can cut back the entire plant to a few inches above the ground. It will often resprout in the spring, giving you another year of delicious chives. Also, divide your clumps every 3 years or so to keep them vigorous.

Here are some common problems you might encounter with chives in Northern California:

Onion Fly

• What it looks like: Wilting or yellowing leaves, stunted growth, and small white maggots at the base of the plant.
• What causes it: Onion flies lay their eggs near the base of onion family plants. The maggots hatch and feed on the roots and bulbs.
• How to fix/prevent it: Use floating row covers to prevent flies from laying eggs. Remove and destroy infested plants. Rotate crops to avoid onion fly buildup in the soil.

Rust

• What it looks like: Rusty orange, yellow, or brown pustules on leaves and stems, mostly on undersides. Leaves yellow and drop prematurely.
• What causes it: Various rust fungi that spread via wind-borne spores. Favored by warm, humid conditions with moisture on leaves.
• How to fix/prevent it: Remove affected leaves. Avoid overhead watering. Improve air circulation. Apply sulfur or copper fungicide. Don't work among wet plants. Rotate crops.

Bulb Rot in Wet Soil

• What it looks like: Yellowing and wilting leaves, mushy bulbs, and a foul odor.
• What causes it: Overwatering or poorly drained soil creates conditions that favor fungal and bacterial growth, leading to bulb rot.
• How to fix/prevent it: Ensure well-drained soil. Avoid overwatering. Plant chives in raised beds if your soil tends to stay wet. Remove and destroy affected plants.

Northern California Specific Challenges: Our dry summers and potential water restrictions mean you need to be mindful of watering, but avoid creating overly wet conditions that lead to bulb rot. Monitor for rust, especially during periods of morning fog or unexpected rain.

Chives are great companions for many plants in your Northern California garden. Carrots benefit from chives because the chives repel carrot root flies. Tomatoes grow better near chives because the chives deter aphids and other pests that can damage tomato plants. Roses benefit from chives because they help deter black spot and other fungal diseases. Grapes also benefit, as chives can deter certain grape pests.

Avoid planting chives near beans or peas, as they can inhibit the growth of these legumes.