Chamomile in Zone 4A — Mountain West

Chamomile is a wonderful addition to any Mountain West garden. Its delicate apple-like flavor makes a soothing tea, and it attracts beneficial insects to your garden. Plus, in our high-altitude environment, the intense sun and cool nights seem to concentrate the plant's essential oils, giving you an even more flavorful harvest.

Our short growing season and alkaline soil can be challenges, but chamomile is surprisingly adaptable. Starting seeds at the right time and amending your soil appropriately will set you up for success. With our approximately 118-day growing season, you'll have plenty of time to enjoy your chamomile harvest.

Starting chamomile indoors is optional but can give you a jump start on our short season. Begin in mid-March through early April, about six weeks before you plan to transplant. Use seed trays with a good seed-starting mix and provide warmth and light – a sunny windowsill or grow light works well.

To ensure even moisture, try bottom watering your seedlings. Place the tray in a shallow container of water and let the soil absorb the moisture from the bottom. Since spring can be slow to arrive in the mountains, starting indoors means your plants will be ready to thrive as soon as the weather warms up.

Transplant your chamomile seedlings outdoors from early May through early June, once the danger of hard frost has passed. Before planting, harden off your seedlings by gradually exposing them to outdoor conditions for about a week. This prevents shock from our intense sun and temperature swings.

Plant seedlings 6-8 inches apart in well-drained soil. Keep an eye on the weather forecast. Even in early May, we can still get a late frost, so be prepared to cover your young plants if necessary.

Direct sowing chamomile is a simple and effective method, particularly if you have well-draining soil. Sow seeds from early May through early July, after the soil has warmed up a bit. Chamomile seeds need light to germinate, so gently press them into the soil surface rather than burying them deeply.

Keep the soil consistently moist until the seedlings emerge. Direct sowing bypasses the need for indoor space and hardening off, but it means your plants will mature a bit later in the season.

Chamomile is drought-tolerant and prefers well-drained soil, making it a great choice for our dry Mountain climate. Overwatering can lead to leggy, weak growth, so it's crucial to find the right balance. During the peak of summer, when temperatures can reach around 85°F, water deeply about once a week, providing about 1 inch of water.

Use the finger test to gauge soil moisture: stick your finger about 2 inches deep into the soil. If it feels dry, it's time to water. Water at the base of the plants to avoid wetting the foliage, which can encourage fungal diseases, even in our low-humidity environment.

In spring and fall, when temperatures are cooler and rainfall is more frequent, you may only need to water every other week, or even less. Watch for signs of underwatering, such as wilting or yellowing leaves, and overwatering, such as soft, mushy stems. A light layer of mulch, like straw or wood chips, can help retain moisture in the soil and regulate soil temperature.

You can expect your first chamomile harvest from early July through late September, about 60 days after planting. Look for flowers where the petals are beginning to bend slightly backward. This indicates they are at their peak flavor and medicinal properties.

Harvest flowers in the morning after the dew has dried. This is when the essential oils are most concentrated. Gently pinch or snip the flower heads off the plant, being careful not to damage the surrounding foliage. Regular harvesting encourages continued production throughout the season.

As our first frost approaches in mid-September, harvest any remaining flowers, even if they aren't fully open. You can dry them indoors for tea or other uses.

Here are some common problems you might encounter with chamomile in the Mountain West:

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 crevices. Stunted growth. *What causes it:* Sap-sucking insects that thrive in warm, dry conditions. Often introduced by ants. *How to fix/prevent it:* Wipe away with a cotton swab dipped in rubbing alcohol. Insecticidal soap or neem oil. Control ant populations.

Thrips *What it looks like:* Tiny, slender insects that cause silvery streaks and distorted growth on leaves and flowers. Black fecal spots. *What causes it:* Sap-sucking insects that are attracted to light-colored flowers. *How to fix/prevent it:* Strong water spray. Insecticidal soap or neem oil. Sticky traps. Encourage beneficial insects like lacewings and minute pirate bugs.

Mountain West Specific Challenges: Our intense UV radiation can sometimes stress plants, making them more susceptible to pests. Ensure your chamomile gets adequate water and consider providing some afternoon shade during the hottest part of the day. The dry air can also encourage spider mites, so monitor your plants regularly and treat infestations promptly.

Chamomile benefits from companion planting in our Mountain gardens. Onions help deter pests, while cabbage and broccoli provide a favorable environment for chamomile to thrive. Cucumbers also make good companions, as chamomile can attract pollinators that will benefit the cucumber crop. Green beans fix nitrogen in the soil, which can benefit chamomile, though chamomile is not a heavy feeder.

Avoid planting chamomile near mint, as mint can be invasive and compete for resources. Also, avoid planting near fennel, as it can inhibit the growth of many plants, including chamomile.