Echinacea in Zone 6B — Midwest

Echinacea, or coneflowers, are a fantastic addition to any Midwest garden. Their vibrant colors brighten up the landscape, plus they attract pollinators like butterflies and bees, which are always welcome in our gardens. Not only are they beautiful, but you can also harvest the petals for tea, adding a touch of homegrown goodness to your herbal remedies.

Our Midwest weather can be unpredictable, with cold winters and occasional summer heat spells, but Echinacea is a hardy perennial that can handle it. With a growing season around 183 days, you'll have plenty of time to enjoy these beauties, especially if you plan ahead and get your seeds started at the right time.

Starting Echinacea indoors is possible, but honestly, you might find it easier to just buy starts from a local nursery. However, if you're up for the challenge, aim to start your seeds indoors from mid-February through early March, about 8 weeks before you plan to transplant them outside.

You'll need seed trays, a good seed-starting mix, and a warm, sunny spot or grow lights. Keep the soil consistently moist by bottom watering – set the tray in a shallow dish of water and let the soil soak it up from the bottom. This helps prevent damping-off. Given our moderate-to-late springs here in the Midwest, starting indoors gives you a head start.

Transplanting Echinacea outdoors should happen from mid-April through early May. Before you plant, be sure to harden off your seedlings by gradually exposing them to outdoor conditions for about a week. This helps them adjust to the Midwest weather.

When transplanting, space the plants 18-24 inches apart. Remember that Echinacea is a perennial, so choose a spot where they'll have room to spread. Keep an eye out for late frost, which can still happen in April. For easier results, especially with the cold stratification needs of the seeds, consider buying established plants from a local nursery.

Direct sowing Echinacea is another option, and it can work well in our fertile Midwest soil. You can direct sow from mid-April through early July. Just make sure the soil temperature is consistently above 60°F.

Prepare the soil by loosening it and removing any weeds. Sow the seeds about ¼ inch deep and keep the soil consistently moist until they germinate. Thin the seedlings to 18-24 inches apart once they're a few inches tall. Direct sowing is simple, but you'll need to be patient since germination can be a bit slow.

Echinacea is very drought-tolerant once established, making it a great choice for Midwest gardens. Being a native plant, it actually thrives in poor, dry soil, so don't overdo the pampering.

During the first few weeks after planting, water regularly to help the plants get established. After that, you'll only need to water during extended dry spells. Stick your finger about 2 inches deep into the soil. If it feels dry, it's time to water. Aim for about an inch of water per week during dry periods. Water at the base of the plants to avoid getting the foliage wet, which can encourage fungal diseases in our moderate-to-humid climate.

Signs of underwatering include wilting leaves and stunted growth. Overwatering can lead to root rot, so watch for yellowing leaves and a mushy stem. Mulching around the base of the plants with straw or wood chips helps retain moisture and suppress weeds, which is always a plus in the Midwest.

Pruning Echinacea is pretty straightforward. Deadheading, or removing spent flowers, encourages more blooms throughout the season. Simply snip off the flower heads just below the spent bloom. You can do this anytime from midsummer to late fall.

Alternatively, you can leave some of the seed heads on the plants for the birds, especially goldfinches, to enjoy during the winter. Plus, the dried seed heads add some visual interest to your winter garden. In late winter or early spring, before new growth appears, cut back the entire plant to the ground.

You can expect your first Echinacea harvest from mid-July through late October, about 90 days after planting. The flowers will be in full bloom, and their vibrant colors will be a feast for the eyes.

To harvest, simply cut the flower heads off the plant, leaving some stem attached. You can also harvest the petals for tea by gently pulling them off the flower head. Remember to leave some seed heads on the plants for the goldfinches, who love to feast on the seeds. As the first frost approaches around mid-October, you can harvest any remaining flowers and dry them for later use. Echinacea provides a continuous harvest throughout the summer and fall, making it a rewarding addition to any Midwest garden.

Here are some common problems you might encounter with Echinacea in the Midwest:

Aster Yellows

• What it looks like: Distorted, greenish flowers and stunted growth. The plant might also develop witches' brooms (dense clusters of shoots).
• What causes it: A disease transmitted by leafhoppers. It's more prevalent during years with high leafhopper populations.
• How to fix/prevent it: Unfortunately, there's no cure for aster yellows. Remove and destroy infected plants immediately to prevent the spread of the disease. Control leafhopper populations with insecticidal soap if necessary.

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: Fungi that thrive in warm days, cool nights, and moderate humidity. Dry leaf surfaces actually favor it (unlike most fungi).
• How to fix/prevent it: Improve air circulation by spacing plants properly and pruning to open up the canopy. Remove affected leaves promptly. Neem oil or potassium bicarbonate sprays can help control the spread. Milk spray (1 part milk to 9 parts water) is surprisingly effective. Plant resistant varieties when possible.

Japanese Beetles

• What it looks like: Skeletonized leaves, where the beetles eat the tissue between the veins. You'll also see the metallic green beetles themselves.
• What causes it: Japanese beetles are attracted to Echinacea and other flowering plants. They're most active during the summer heat spells.
• How to fix/prevent it: Handpick the beetles off the plants and drop them into a bucket of soapy water. You can also use row covers to protect the plants during peak beetle activity. Neem oil can also deter them.

Midwest Specific Challenges: The moderate-to-hot heat and moderate-to-humid humidity of our Midwest summers can create favorable conditions for powdery mildew and Japanese beetles. Keep an eye on your plants, especially during periods of high humidity and rainfall, and take action promptly to prevent problems from getting out of control.

Echinacea benefits from good companion planting. Tomatoes and peppers make excellent neighbors, as their needs for full sun and well-drained soil align perfectly. Plus, the taller tomato and pepper plants can provide some light shade during the hottest part of the day, which can help prevent sunscald on Echinacea.

Many herbs, such as rosemary, thyme, and lavender, also make great companions for Echinacea. These herbs attract beneficial insects that can help control pests, and their aromatic foliage can deter deer and other herbivores. Avoid planting Echinacea near anything that prefers consistently moist soil, as Echinacea thrives in drier conditions.