Chamomile in Zone 9A — Northern California

Chamomile is a fantastic addition to any Northern California garden. Its delicate, apple-like flavor makes a soothing tea, and it attracts beneficial insects to your veggie patch. Plus, the satisfaction of brewing your own homegrown tea on a cool evening after a long day is hard to beat.

Our Mediterranean climate, with its long, dry summers and mild, wet winters, presents unique challenges like drought and occasional heat spikes. But with a long growing season of around 288 days, you have plenty of time to get your Chamomile established and enjoy multiple harvests.

Starting Chamomile indoors is an option, but honestly, it's not usually necessary here in Northern California given our mild winters. If you're eager to get a head start, or if you're dealing with particularly heavy clay soil that needs extra amending before planting, you can start seeds indoors from mid-December through early January. That gives you about six weeks before transplanting.

Use seed trays with a good seed-starting mix, and keep them in a warm spot with plenty of light – a sunny windowsill or under grow lights works well. Bottom watering is key to avoid damping off; just set the tray in a shallow dish of water and let the soil soak it up from the bottom. With our early spring character, starting indoors gives you a jump, but don't feel obligated.

Transplant your Chamomile seedlings outdoors from early February through early March, once they have a few sets of true leaves. Be sure to harden them off first by gradually exposing them to outdoor conditions for about a week. This helps them adjust to the sun and wind.

Space the plants about 6-8 inches apart in well-drained soil. Keep an eye on the weather forecast; even though we have mild winters, a late frost can still happen. Cover the seedlings if temperatures are predicted to dip below freezing.

Direct sowing Chamomile is the easiest method, and it works great in our Northern California climate. You can sow seeds directly into the garden from early February through late September. This gives you a long window to get multiple plantings in for a continuous harvest.

Simply prepare the soil by loosening it and removing any weeds. Sprinkle the tiny seeds on the surface and gently press them into the soil. Chamomile prefers soil temperatures around 60-70°F for optimal germination. Keep the soil consistently moist until the seedlings emerge, which usually takes about a week or two. Thin seedlings to 6-8 inches apart.

Chamomile is drought-tolerant once established, which is a huge plus given our dry summers and occasional water restrictions here in Northern California. However, consistent watering is important, especially during the first few weeks after planting. Aim to keep the soil evenly moist, but not soggy.

During the spring and fall, when temperatures are mild and we get occasional rain, you may only need to water once or twice a week. In the heat of summer, you might need to water every other day, depending on your specific microclimate. Use the finger test: stick your finger into the soil about 2 inches deep. If it feels dry, it's time to water. Generally, an inch of water per week is sufficient.

Water at the base of the plants to avoid wetting the foliage, which can encourage fungal diseases in our low-humidity environment. Mulching around the plants with straw or wood chips helps retain moisture and suppress weeds. Yellowing leaves can indicate overwatering, while wilting leaves signal underwatering.

You can expect your first Chamomile harvest about 60 days after planting, which means from early April through mid-December if you stagger your plantings. The best time to harvest is in the morning after the dew has dried, but before the sun gets too hot.

Look for flowers where the petals are just beginning to bend slightly backward. This indicates they're at their peak flavor and medicinal properties. Gently pluck the flowers from the stem, being careful not to damage the plant.

Harvesting regularly encourages continued production, so keep an eye on your plants and pick the flowers as they mature. As our first frost approaches in early December, harvest any remaining flowers to dry and store for winter teas.

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

Aphids *What it looks like:* Clusters of tiny soft-bodied insects (green, black, or white) on stems and leaf undersides. Sticky honeydew residue. Curled or distorted new growth. *What causes it:* Rapid-reproducing sap-sucking insects. Populations explode in warm weather. Ant colonies may farm them for honeydew. *How to fix/prevent it:* Strong water spray knocks them off. Encourage ladybugs and lacewings (natural predators). Insecticidal soap for heavy infestations. Neem oil works systemically. Avoid excess nitrogen fertilizer (it attracts them).

Mealybugs *What it looks like:* White, cottony masses on stems and leaf joints. Stunted growth. Sticky honeydew residue. *What causes it:* Sap-sucking insects that thrive in warm, dry conditions. Often introduced by ants. *How to fix/prevent it:* Dab individual mealybugs with a cotton swab dipped in rubbing alcohol. Introduce beneficial insects like lacewings. Insecticidal soap or neem oil sprays. Control ant populations.

Thrips *What it looks like:* Tiny, slender insects (yellow, brown, or black) on flowers and leaves. Silvery streaks or stippling on foliage. Distorted or discolored flowers. *What causes it:* Sap-sucking insects that prefer warm, dry weather. Can spread viruses. *How to fix/prevent it:* Strong water spray. Sticky traps. Insecticidal soap or neem oil sprays. Remove infested plant debris.

Northern California Specific Challenges: Our moderate-to-hot summer heat, combined with low humidity and dry conditions, can stress Chamomile plants, making them more susceptible to pests and diseases. Consistent watering, especially during heat waves, and providing some afternoon shade can help keep your plants healthy and productive.

Chamomile is a great companion plant for many vegetables in your Northern California garden.

Good companions:

• Onions: Chamomile is said to improve the flavor and growth of onions.
• Cabbage and Broccoli: Chamomile attracts beneficial insects like hoverflies and ladybugs, which prey on cabbage moths and aphids that can damage these brassicas.
• Cucumbers: Chamomile can help deter cucumber beetles.
• Green Beans: Chamomile is thought to improve the flavor and vigor of green beans.

Avoid planting Chamomile near mint or fennel. Mint can be invasive and outcompete Chamomile for resources, while fennel inhibits the growth of many plants.