Chives in Zone 7B — Northern California

Chives are a fantastic, easy-to-grow addition to any Northern California garden. Their mild onion flavor elevates everything from salads to baked potatoes, and the pretty purple flowers are a bonus for both you and the pollinators. Plus, you can't beat the satisfaction of snipping fresh herbs right outside your door almost year-round in our mild Mediterranean climate!

Our dry summers and occasional water restrictions can present challenges, but with smart planting and watering, Chives thrive here. The long 245-day growing season in Zone 7B gives you plenty of time to enjoy a continuous harvest.

Starting Chives indoors isn't strictly necessary in our climate, but it can give you a head start, especially if you're after an early harvest. If you want to try it, sow seeds indoors from late December through mid January, about eight weeks before you plan to transplant. Use seed trays with a good seed-starting mix, keep them warm, and provide plenty of light – a grow light works wonders.

Remember to water from the bottom to avoid damping off. This is especially important during our cooler, sometimes damp, late winter months.

Transplant your indoor-started Chives outdoors in early to late March. Before planting, harden them off by gradually exposing them to outdoor conditions for about a week. Space them 8-12 inches apart in well-drained soil.

Keep an eye on the weather forecast; while Chives are hardy, a late cold snap could still set them back. Honestly, though, buying established starts or dividing existing clumps is often a faster and easier way to get going than starting from seed.

Direct sowing Chives is definitely an option here in Northern California, and it’s pretty straightforward. Sow seeds mid February through mid August, ensuring the soil temperature is consistently above 60°F. Prepare the soil well, keeping it loose and free of clumps.

Space the seeds 8-12 inches apart. Be patient, as Chives can be slow to establish from seed. Again, if you want quicker results, consider buying starts or dividing existing plants – it's often the preferred method in our region.

Consistent moisture is key for happy Chives, especially during our dry summers. While they're more tolerant of moisture than some herbs, they're definitely not drought-tolerant. In the spring and fall, when temperatures are mild and we get occasional rain, water deeply about once a week, or whenever the top two inches of soil feel dry to the touch – use the finger test!

During the hotter summer months, you'll likely need to water two to three times a week. Aim for about an inch of water per week, either from rainfall or irrigation. Water at the base of the plants to avoid wetting the foliage, which can encourage fungal diseases in our sometimes humid microclimates.

Signs of underwatering include drooping or yellowing leaves, while overwatering can lead to soggy soil and potential bulb rot. Applying a layer of mulch around your Chives will help retain moisture in the soil and suppress weeds, which is a win-win in our dry climate.

You can expect your first harvest of Chives from early May through late November in Northern California. The leaves are ready to harvest when they are at least 6 inches tall. Use scissors to cut the leaves about 1-2 inches above the base of the plant.

This encourages new growth, and you can harvest continuously throughout the growing season. Just be sure to leave enough foliage for the plant to keep thriving. As the first frost approaches in mid- November, give your Chives a final trim.

Here are a few 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 near the base of the plant or on the bulbs.
• What causes it: Onion flies lay their eggs near the base of onion family plants. The maggots hatch and burrow into the bulbs, causing damage.
• How to fix/prevent it: Use floating row covers to prevent flies from laying eggs. Remove and destroy any infested plants. Rotate crops each year.

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: Soft, mushy bulbs, yellowing leaves, and a foul odor.
• What causes it: Overwatering or poorly draining soil creates conditions favorable for fungal and bacterial pathogens that cause bulb rot.
• How to fix/prevent it: Ensure the soil is well-draining. Avoid overwatering. Plant Chives in raised beds if your soil is heavy clay. Remove and destroy any affected plants immediately.

Northern California Specific Challenges: Our dry summers and potential water restrictions mean you need to be diligent about watering, but avoid overwatering to prevent bulb rot. The low humidity generally helps prevent fungal diseases, but watch out for rust during periods of unexpected rain or fog.

Chives are great companions for many plants in your Northern California garden. They deter pests from carrots and tomatoes, improving their yields. Roses benefit from Chives planted nearby as they help repel aphids. Grapes also enjoy the company of Chives, as they can help deter certain fungal diseases.

Avoid planting Chives near beans or peas, as they can inhibit their growth. It's all about creating a happy, healthy ecosystem in your garden!