Chamomile in Zone 7A — Mountain West

Chamomile is a delightful addition to any Mountain West garden. Its delicate, apple-like aroma and calming tea make it a rewarding crop, and it’s surprisingly unfussy. Plus, our cool nights here at altitude seem to intensify the flavor of herbs, giving your chamomile an extra boost.

Our short growing season and intense sun can seem daunting, but chamomile is a hardy plant that thrives with a little attention to timing. With a 173-day growing season, you have plenty of opportunity to enjoy chamomile's benefits.

Starting chamomile indoors gives you a head start, but it's not strictly necessary in our zone. If you want to get a jump on the season, aim to sow seeds indoors from mid-February through early March, 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 works well. Water from the bottom to prevent damping off, which can be a problem with seedlings. Remember, our spring weather can be unpredictable, so having seedlings ready to go gives you some flexibility.

Transplant your chamomile seedlings outdoors from early April through early May, once the danger of hard frost has passed. 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 or partially shaded spot. Keep an eye on the forecast – late-season snow or a sudden cold snap can still happen in the mountains, so be prepared to cover your young plants if needed.

Direct sowing chamomile is a simple and effective method, especially if you're not looking for a super early harvest. Sow seeds directly into the garden from early April through late July.

Choose a spot with well-drained soil and gently rake the seeds into the top layer. Chamomile seeds need light to germinate, so don't bury them too deeply. Keep the soil consistently moist until the seedlings emerge, which usually takes about a week or two.

Chamomile is relatively drought-tolerant, making it a great choice for our dry Mountain West climate. However, consistent watering, especially during establishment, is key to healthy growth.

During the hotter months, especially July and August, check the soil moisture regularly. Stick your finger about two inches deep into the soil – if it feels dry, it's time to water. Aim for about 1 inch of water per week, depending on rainfall.

Water at the base of the plants to avoid wetting the foliage, as this can encourage fungal diseases in humid conditions (though humidity is typically low here). Yellowing leaves can indicate overwatering, while wilting suggests underwatering. A light layer of mulch, such as straw or wood chips, can help retain moisture and suppress weeds, a useful strategy in our high-altitude gardens where water is often a precious commodity.

You can expect your first chamomile harvest starting in early June and continuing through mid-October, about 60 days after planting. The best time to harvest is in the morning after the dew has dried, when the flowers are at their peak.

Look for flowers with petals that are just beginning to bend slightly backward – this indicates they're ready to be picked. Gently pluck the flower heads from the stems, being careful not to damage the plant. Regular harvesting encourages continued production, so don't be shy about picking those blooms.

As the first frost approaches in early October, harvest any remaining flowers to dry and store for winter tea.

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:* Cottony, white masses on stems, leaves, and especially in leaf axils. Stunted growth. Honeydew secretion, leading to sooty mold. *What causes it:* Sap-sucking insects thrive in warm, dry conditions and can be spread by ants. Over-fertilization can also contribute. *How to fix/prevent it:* Wipe away with a cotton swab dipped in rubbing alcohol. Insecticidal soap or neem oil can be effective. Control ant populations. Ensure good air circulation to deter them.

Thrips *What it looks like:* Tiny, slender insects (yellowish or black) that cause silvery streaks or stippling on leaves and flowers. Distorted or scarred plant tissue. Black specks of excrement. *What causes it:* These tiny pests are attracted to plants under stress, especially in hot, dry conditions. They feed by rasping plant tissue. *How to fix/prevent it:* Introduce beneficial insects like lacewings. Spray with insecticidal soap or neem oil. Remove infested plant parts. Keep plants well-watered to reduce stress.

Mountain West Specific Challenges: Our moderate-at-altitude heat and low humidity generally keep fungal diseases at bay, but the intense sun can stress plants, making them more susceptible to pests. Be vigilant about watering and provide some afternoon shade if your chamomile seems to be struggling.

Chamomile is a great companion plant for many vegetables in our Mountain West gardens. Onions help deter pests, while cabbage and broccoli benefit from chamomile's ability to attract beneficial insects. Cucumbers see improved growth and flavor, and green beans may experience fewer pest problems when planted near chamomile. Avoid planting it near mint, as they can compete for resources.