Echinacea in Zone 8A — Southeast

Echinacea, also known as coneflower, is a fantastic addition to any Zone 8A garden. Its daisy-like flowers add beauty, attract pollinators, and can even be used to make herbal tea. Plus, these hardy perennials are well-suited to our long summer growing season in the Southeast.

We definitely have our share of gardening challenges here, including the humidity and clay soil. But with a little planning, you can easily grow Echinacea and enjoy blooms from midsummer well into the fall. Our 245-day growing season gives you plenty of time to get them established.

Starting Echinacea indoors gives you a jump start, but it's not essential in our climate. If you want to get a head start, sow seeds indoors from mid January through early February, about eight weeks before you plan to transplant them. Use seed trays with a good seed-starting mix, and keep them warm and well-lit.

Bottom watering is a great way to keep the soil consistently moist without overwatering, which is especially important when seedlings are young. In our moderate Southeast spring, indoor starting gives you an edge, but direct sowing is often just as successful.

Transplant your Echinacea seedlings outdoors from mid March through early April, once the danger of frost has passed. Be sure to harden them off first by gradually exposing them to outdoor conditions for about a week. This helps them adjust to the Southeast sunshine and breezes.

Space your plants 18-24 inches apart to give them room to spread. Remember that Echinacea is a perennial, so choose a location where they can thrive for years to come. While you can start from seed, many gardeners find it easier to buy established starts, as Echinacea seeds benefit from cold stratification.

Direct sowing Echinacea is a viable option in our long growing season. Sow seeds outdoors from mid March through early August, ensuring the soil temperature is consistently above 60°F. Prepare the soil well, removing any weeds and adding compost to improve drainage.

Sow seeds about ¼ inch deep and keep the soil consistently moist until they germinate. Thin seedlings to 18-24 inches apart once they are a few inches tall. Direct sowing is easy, but keep in mind that you might not see blooms until the following year.

Echinacea is surprisingly drought-tolerant once established, which is a huge plus for us in the Southeast. While we get reliable summer rain, those hot spells can still dry things out quickly. The key is to water deeply and infrequently, encouraging strong root growth.

During the first few weeks after planting, water regularly to help your Echinacea get established. After that, let the soil dry out between waterings. A good way to check is the "finger test": stick your finger about 2 inches deep into the soil. If it feels dry, it's time to water.

Typically, established Echinacea only needs about 1 inch of water per week, including rainfall. It's best to water at the base of the plant to avoid wetting the foliage, which can increase the risk of fungal diseases in our humid climate. Signs of underwatering include wilting leaves, while overwatering can lead to root rot.

Mulching around your Echinacea plants with pine straw or wood chips helps retain moisture and suppress weeds. This is especially helpful during those hot summer months here in the Southeast.

Deadheading Echinacea is a simple way to encourage more blooms. Throughout the growing season, from midsummer through fall, simply snip off the spent flowers just below the flower head. This redirects the plant's energy into producing new flowers.

However, if you want to attract birds like goldfinches to your garden, leave some of the seed heads intact. They'll provide a valuable food source during the winter. In late winter, after the first frost around mid- November, cut back the entire plant to a few inches above the ground to prepare it for new growth in the spring.

You can expect your first Echinacea harvest from mid June through late November, about 90 days after planting. The flowers are ready to harvest when they are fully open and the petals are vibrant. It's best to harvest on a dry day to avoid fungal issues.

To harvest, simply cut the flower stems near the base of the plant. You can use the petals fresh or dry them for teas or other herbal remedies. Remember to leave some seed heads on the plants to attract birds and allow for natural reseeding.

As the first frost approaches in mid- November, you can still harvest any remaining flowers. Even after a light frost, the petals can still be used.

Echinacea is generally a low-maintenance plant, but here are some common problems to watch out for in the Southeast:

Aster Yellows

• What it looks like: Distorted, greenish flowers with tufts of growth in the center. The plant may also be stunted.
• What causes it: A disease transmitted by leafhoppers. It's more prevalent during warm, humid weather, which we often experience in the Southeast.
• How to fix/prevent it: Unfortunately, there's no cure. Remove and destroy infected plants immediately to prevent the spread. Control leafhopper populations with insecticidal soap.

Powdery Mildew

• What it looks like: White or grayish powdery coating on leaves, stems, and sometimes flower heads. Leaves may curl, yellow, and eventually die.
• What causes it: Various fungi that thrive in warm days, cool nights, and moderate humidity. It can be a real issue during our humid summers.
• How to fix/prevent it: Improve air circulation by spacing plants appropriately and pruning if necessary. Remove affected leaves promptly. 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 and flowers.
• What causes it: Japanese beetles are a common pest in the Southeast, especially during the summer months.
• How to fix/prevent it: Handpick beetles and drop them into a bucket of soapy water. Use row covers to protect plants. Neem oil can also deter them.

Southeast Specific Challenges: The hot, humid summers in the Southeast create a favorable environment for fungal diseases like powdery mildew. Proper spacing and good air circulation are crucial for preventing these issues. Also, be vigilant about Japanese beetles, as they can quickly decimate your Echinacea plants.

Echinacea benefits from companion planting. Tomatoes and peppers make excellent companions because they don't compete for the same nutrients and can help deter some pests. The strong scent of herbs like rosemary, sage, and thyme can also help repel unwanted insects.

Avoid planting Echinacea near plants that are susceptible to the same diseases, such as asters, as this can increase the risk of spreading infections. Also, keep Echinacea away from aggressive spreaders that might outcompete them for resources in our clay soil.