Chamomile in Zone 9A — Southern California

Chamomile is a fantastic addition to any Southern California garden. Its delicate, apple-like flavor makes a soothing tea, and the plant itself attracts beneficial insects to your garden. Plus, it's incredibly rewarding to harvest your own homegrown tea ingredients right from your backyard in our mild climate.

Yes, we deal with drought and occasional heat waves, but Chamomile is surprisingly resilient. With our long 322-day growing season, you have ample opportunity to get a beautiful harvest of chamomile flowers. Timing is everything, and you'll find chamomile thrives with a little planning.

Starting chamomile indoors gives you a head start, especially if you're aiming for an early spring harvest. Sow seeds indoors from late November through late December, about six weeks before you'd like to transplant them. Use seed trays with a good seed-starting mix, provide gentle warmth, and ensure they get plenty of light, especially since our days are shorter during that time.

A tip I learned early on is to water from the bottom to avoid disturbing the tiny seeds. Place the tray in a shallow dish of water and let the soil soak it up. Starting indoors makes more sense if you want a large, controlled batch, but direct sowing is perfectly viable in our Zone 9A climate.

Transplant your chamomile seedlings outdoors from mid January through mid February. This timing allows them to establish before the summer heat inland really kicks in. Before transplanting, harden off your seedlings by gradually exposing them to outdoor conditions for about a week.

Space them 6-8 inches apart in a sunny spot with well-draining soil. Even though our winters are mild, keep an eye on the forecast for any unexpected cold snaps and be ready to cover them if needed, especially inland.

Direct sowing chamomile is incredibly easy here in Southern California. You can sow seeds directly into the garden from mid January through early October. This wide window takes advantage of our long growing season.

Prepare the soil by loosening it and removing any weeds. Chamomile prefers soil temperatures around 60-70°F for optimal germination, so keep that in mind, especially if sowing in early spring or late fall. Sow seeds 6-8 inches apart and lightly cover them with soil. Keep the soil consistently moist until the seedlings emerge. Direct sowing is less work, but you might need to thin out seedlings later.

Chamomile is a water-wise plant, which is a huge plus in drought-prone Southern California. It prefers well-drained soil and doesn't like to sit in soggy conditions, which can lead to weak growth.

During our winter-wet season, you might not need to water at all, relying on rainfall to do the job. However, during the drier months, especially in the summer heat inland, water deeply but infrequently. A good rule of thumb is to check the soil about two inches deep – if it's dry to the touch, it's time to water. Aim for about 1 inch of water per week, but adjust based on rainfall and temperature.

Water at the base of the plants to avoid wetting the foliage, which can encourage fungal diseases in our low-to-moderate humidity. Signs of underwatering include wilting or yellowing leaves. Overwatering can cause root rot and leggy growth. Mulching around your chamomile plants with compost or wood chips helps retain moisture in the soil and keeps the roots cool during our hot summers.

You can expect your first chamomile harvest around mid March, about 60 days after planting. The harvest window extends all the way through late December in our mild winters. The best time to harvest chamomile flowers is in the morning after the dew has dried, when the flowers are at their peak.

Look for flowers where the petals are bent slightly backward – this indicates they are ready to be picked. Gently pluck the flowers from the stem, being careful not to damage the plant. Regular harvesting encourages continued production, so keep picking those blooms!

As our first frost approaches around mid- December, continue harvesting any remaining flowers. You can dry them for tea or use them fresh. Even after the first frost, the plant might still produce a few more blooms if protected.

Chamomile is relatively trouble-free, but here are a few common problems we see in Southern California gardens:

Aphids

• What it looks like: Clusters of tiny soft-bodied insects (green, black, or white) on stems and leaf undersides. You might also notice sticky honeydew residue and curled or distorted new growth.
• What causes it: These rapid-reproducing sap-sucking insects thrive in warm weather. Ant colonies often "farm" them for their honeydew.
• How to fix/prevent it: A strong spray of water can knock them off. Encourage natural predators like ladybugs and lacewings. For heavy infestations, use insecticidal soap or neem oil. Avoid over-fertilizing with nitrogen, which attracts aphids.

Mealybugs

• What it looks like: White, cottony masses on stems and leaves, often in joints and crevices. Stunted growth and yellowing leaves can also occur.
• What causes it: These sap-sucking insects are attracted to stressed plants. Hot, dry conditions and poor air circulation can make infestations worse, especially during Santa Ana winds.
• How to fix/prevent it: Remove mealybugs by hand with a cotton swab dipped in rubbing alcohol. Increase air circulation around the plants. Insecticidal soap or neem oil can also be effective. Ensure your plants are getting adequate water, especially during dry spells.

Thrips

• What it looks like: Tiny, slender insects that cause silvery streaks and distorted flowers or leaves. You might also see black fecal spots on the foliage.
• What causes it: Thrips are attracted to light-colored flowers and foliage. They thrive in warm, dry conditions.
• How to fix/prevent it: Encourage beneficial insects like lacewings and predatory mites. Use sticky traps to catch adult thrips. Insecticidal soap or neem oil can help control infestations. Keep your garden free of weeds and debris, as these can harbor thrips.

Southern California Specific Challenges: Our hot summer heat inland can stress chamomile, making it more susceptible to pests. Low-to-moderate humidity reduces the risk of fungal diseases, but Santa Ana winds can quickly dry out plants, so be sure to monitor soil moisture. Winter-wet rainfall can be beneficial, but ensure good drainage to prevent root rot.

Chamomile makes a great companion plant in the Southern California garden. It attracts beneficial insects like hoverflies and ladybugs, which prey on aphids and other pests.

Good companions include onions, cabbage, and broccoli. Chamomile helps repel cabbage moths that can damage these crops. Cucumbers also benefit from chamomile's presence, as it attracts pollinators that increase fruit production. Green beans also thrive near chamomile, as it is thought to improve their growth and flavor. Avoid planting chamomile near mint, as they can compete for resources and chamomile can stunt mint's growth.