Chamomile in Zone 7A — Northern California

Chamomile is a fantastic addition to any Northern California garden. Its delicate apple-like flavor makes a soothing tea, and the plant itself is a charming, low-maintenance addition to your garden beds. Plus, in our Mediterranean climate, chamomile thrives and provides a calming presence in your garden.

We know our region presents unique gardening challenges, like extended dry spells and the occasional heat wave. But with our long growing season, typically stretching from mid-March through early November, you'll have plenty of time to enjoy a bountiful chamomile harvest.

Starting chamomile indoors isn't strictly necessary in our climate, but it can give you a head start, especially if you want an earlier bloom. Begin sowing seeds indoors from mid January through early February, about six weeks before you plan to transplant.

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. Bottom watering is ideal for chamomile seedlings; it prevents damping off and encourages strong root growth. Our early springs often bring unpredictable weather, so indoor starting gives you more control.

Transplant your chamomile seedlings outdoors from early March through early April, once the danger of frost has passed. Before planting, harden them off by gradually exposing them to outdoor conditions for about a week. This prevents transplant shock.

Space plants 6-8 inches apart in a sunny spot with well-drained soil. Keep an eye on the weather forecast around transplant time; a late cold snap is always possible, even here!

Direct sowing chamomile is a simple and effective method in our region. Sow seeds directly into the garden from early March through late August. This gives you flexibility throughout the growing season.

Prepare the soil by loosening it and removing any weeds. Chamomile prefers slightly cooler soil temperatures for germination, so early spring or late summer sowings are ideal. Space the seeds 6-8 inches apart and gently press them into the soil.

Chamomile is relatively drought-tolerant, making it a great choice for water-wise gardening in Northern California. Established plants need very little supplemental watering, especially during our dry summers.

During the hotter months, check the soil moisture by using the finger test: insert your finger about 2 inches into the soil. If it feels dry, it's time to water. Aim for about 1 inch of water per week during the peak of summer, but only if rainfall is absent. Water at the base of the plant to avoid wetting the foliage, which can encourage fungal diseases in our low-humidity environment.

Overwatering can lead to leggy growth and weak plants, so err on the side of caution. Signs of underwatering include wilting or yellowing leaves, while overwatering can cause root rot. Applying a layer of mulch around your chamomile plants can help retain soil moisture and suppress weeds, which is especially helpful during our dry summers.

You can expect your first chamomile harvest from early May through mid November, about 60 days after planting. The flowers are ready to harvest when the petals begin to bend slightly backward.

Harvest in the morning after the dew has dried for the best flavor and aroma. Gently pluck the flowers from the stems, being careful not to damage the plant. Regular harvesting encourages continued production throughout the season.

As our first frost approaches in early November, continue to harvest any remaining flowers. You can dry them for tea or use them fresh. A final light pruning can help the plant overwinter and prepare for new growth in the spring.

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:* Small, white, cottony masses on stems and leaves, often in leaf axils. Stunted growth and yellowing leaves. *What causes it:* Sap-sucking insects that thrive in warm, dry conditions. They are often brought in by ants. *How to fix/prevent it:* Wipe away mealybugs with a cotton swab dipped in rubbing alcohol. Introduce beneficial insects like lacewings. Insecticidal soap or neem oil can also be effective. Control ant populations to prevent them from spreading mealybugs.

Thrips *What it looks like:* Tiny, slender insects that cause silvery streaks and distorted growth on leaves and flowers. Black fecal spots may also be present. *What causes it:* These pests are attracted to light-colored flowers and are more prevalent during dry periods. *How to fix/prevent it:* Spray plants with a strong stream of water. Insecticidal soap or neem oil can help control infestations. Remove infested plant parts. Blue sticky traps can attract and capture thrips.

Northern California Specific Challenges: Our moderate-to-hot summers, combined with low humidity and dry conditions, can stress chamomile plants, making them more susceptible to pests. Providing adequate but not excessive water and ensuring good air circulation can help prevent these problems. Regularly inspect your plants for early signs of infestation to address issues before they become severe.

Chamomile makes a wonderful companion plant in Northern California gardens. Its presence is said to improve the health and flavor of several vegetables.

Good companions include onions, cabbage, and broccoli. Chamomile attracts beneficial insects that prey on common pests of these crops. It also helps to deter cabbage moths. Cucumbers and green beans also benefit from chamomile's presence, as it can improve their growth and yield.

Avoid planting chamomile near mint, as they compete for resources and can inhibit each other's growth.