Echinacea in Zone 5A — Mountain West

Echinacea, or coneflower, is a fantastic addition to any Mountain West garden. These hardy perennials offer beautiful blooms in shades of purple, pink, and white, attracting pollinators like butterflies and bees to your yard. Plus, the petals can be harvested for tea, adding a touch of homegrown goodness to your cool evenings.

High altitude gardening in our region presents unique challenges, like intense sun and a short growing season of only 138 days. But with proper timing and a bit of planning, you can successfully grow Echinacea and enjoy its beauty and benefits year after year. Don't let our alkaline soil scare you, either – Echinacea is surprisingly adaptable.

Starting Echinacea indoors gives you a head start on our short growing season, but it's not always necessary. If you're aiming for blooms in the first year, or want to grow a specific variety, starting indoors can be beneficial.

Begin in early to late March, about 8 weeks before the last expected frost. Use seed trays with a good seed-starting mix, and provide warmth and light. Bottom watering will help prevent damping off and keep the seedlings healthy. Remember, our spring weather can be unpredictable, so having transplants ready gives you more flexibility.

Transplanting Echinacea outdoors should happen in early to late May, after 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 helps them adjust to the intense sun and cool nights common in our region.

Space plants 18-24 inches apart to allow for good air circulation. While you can grow Echinacea from seed, buying starts from a local nursery can be easier, especially since the seeds need cold stratification to germinate well. Keep an eye on the weather forecast – a late frost or hailstorm can still occur in May.

Direct sowing Echinacea is a viable option, especially if you're not in a rush for first-year blooms. Sow seeds directly into the garden from early May through mid June, once the soil has warmed up.

Prepare the soil by loosening it and removing any weeds. Echinacea prefers well-drained soil, so amend with compost if necessary. Keep the soil consistently moist until the seedlings emerge, then thin them to 18-24 inches apart. Direct sowing is less work upfront, but germination can be slower and less reliable than starting indoors.

Echinacea is incredibly drought-tolerant once established, making it a perfect fit for our dry Mountain West climate. In fact, overwatering is a far bigger threat than underwatering with these natives. Our region's moderate-at-altitude summer heat, combined with low humidity and scant rainfall (10-20 inches annually), means you need to be very careful with your watering schedule.

During the first few weeks after planting, water regularly to help the plants establish strong roots. After that, water deeply but infrequently, allowing the soil to dry out between waterings. Stick your finger about 2 inches deep into the soil – if it feels dry, it's time to water. Aim for about 1 inch of water per week, either from rainfall or irrigation. Water at the base of the plant to avoid wetting the foliage, which can encourage fungal diseases in our cool nights.

Drooping leaves are a sign of underwatering, while yellowing leaves or root rot indicate overwatering. A light layer of mulch around the base of the plants will help retain moisture and suppress weeds, but avoid piling it up against the stems, as this can lead to rot. Remember, Echinacea thrives on neglect, so don't pamper it too much.

Pruning Echinacea is simple and mostly involves deadheading spent flowers. Throughout the growing season, from midsummer to fall, remove faded blooms to encourage more flowers. This directs the plant's energy into producing new buds instead of seeds.

Alternatively, you can leave some seed heads on the plants to provide food for birds, especially goldfinches, during the winter months. In late winter, before new growth begins, cut back the entire plant to the ground to tidy it up and prepare it for the next growing season. With our first frost around late September, that gives you a solid signal to wrap up the growing season.

You can expect your first Echinacea harvest from early August through early October. The flowers will be in full bloom, displaying their vibrant colors. A sign of ripeness is when the petals are fully open and the central cone is prominent.

To harvest, simply clip the flower stems with sharp scissors or pruners, leaving a few inches of stem attached. Harvesting the flowers will encourage the plant to produce more blooms throughout the season. You can also harvest the petals for tea. As the first frost approaches in late September, you can collect any remaining flowers or seed heads for drying or saving for next year. Leave some seed heads for the birds to enjoy over the winter.

Echinacea is generally a low-maintenance plant, but it can be susceptible to a few problems in our Mountain West climate. Here are three common issues to watch out for:

Aster Yellows

• What it looks like: Distorted, greenish flowers, often with a witches' broom appearance (excessive branching). The plant may also be stunted.
• What causes it: A phytoplasma (bacteria-like organism) transmitted by leafhoppers.
• How to fix/prevent it: Unfortunately, there is no cure for aster yellows. Remove and destroy infected plants to prevent the spread of the disease. Control leafhopper populations with insecticidal soap or neem oil.

Powdery Mildew

• What it looks like: White or grayish powdery coating on leaves, stems, and sometimes flower heads. Leaves may curl, yellow, and die.
• What causes it: Various fungi that thrive in warm days, cool nights, and moderate humidity. Dry leaf surfaces actually favor it.
• How to fix/prevent it: Improve air circulation by spacing plants properly and pruning. Remove affected leaves. Neem oil or potassium bicarbonate sprays can help. A milk spray (1 part milk to 9 parts water) is surprisingly effective.

Japanese Beetles

• What it looks like: Metallic green beetles that skeletonize leaves, leaving behind a lacy appearance.
• What causes it: Japanese beetles are attracted to the foliage and flowers of Echinacea.
• How to fix/prevent it: Handpick beetles off plants and drop them into a bucket of soapy water. Use row covers to protect plants during peak beetle activity. Neem oil can also deter beetles.

Mountain West Specific Challenges: Our moderate-at-altitude heat, combined with low humidity and dry rainfall, can actually help prevent some fungal diseases that thrive in more humid climates. However, the intense UV radiation can stress plants, making them more susceptible to pests and diseases. Be sure to provide adequate water and protection from the sun during the hottest part of the day, especially for young plants.

Echinacea makes a great companion plant for several vegetables and herbs in your Mountain West garden. Tomatoes and peppers benefit from Echinacea's ability to attract pollinators, increasing fruit production. Herbs like rosemary and thyme help deter pests, protecting your Echinacea from unwanted visitors.

Avoid planting Echinacea near plants that require consistently moist soil, as Echinacea prefers drier conditions.