Feverfew in Zone 6A — Great Plains

Feverfew is a fantastic addition to any Great Plains garden. Its cheerful, daisy-like flowers bring beauty and attract beneficial insects, while its leaves have a history as a traditional herbal remedy. Plus, it's surprisingly drought-tolerant, which is a huge bonus given our variable rainfall.

Sure, we face extreme weather here in the Plains – wind, hail, and temperature swings are all part of the deal. But with a growing season of around 188 days, you have plenty of time to get Feverfew established and enjoy its benefits. Proper timing and a little planning are key.

Starting Feverfew indoors gives you a head start, but it's not always necessary. If you're in the northern part of Zone 6A with a slightly shorter growing season, or if you want blooms extra early, consider indoor sowing.

Start your seeds indoors from early to late February, about 8 weeks before you plan to transplant. Use seed trays with a good seed-starting mix. Keep them warm and provide plenty of light – a grow light works wonders. Don't forget to water from the bottom to avoid damping off. Our spring weather can be unpredictable, so starting indoors gives you a buffer against late frosts.

Transplant your Feverfew seedlings outdoors from early April through early May, once the risk of hard frost has passed. Before transplanting, harden them off by gradually exposing them to outdoor conditions for about a week. This helps them adjust to the wind and temperature fluctuations that are common in the Plains.

Choose a spot with full sun to part shade, and space the plants 12-15 inches apart. Keep an eye on the weather forecast – a late cold snap can still happen. Be ready to cover your young plants if needed.

Direct sowing is a perfectly viable option for Feverfew, especially if you're in the southern part of Zone 6A or prefer a more hands-off approach. The biggest pro is simplicity, no need to baby seedlings indoors! The con is that you're relying on the weather cooperating for germination.

Sow seeds directly into the garden from mid April through late July. Make sure the soil is well-drained and has warmed up a bit. Lightly cover the seeds with soil and keep them consistently moist until they germinate. Thin seedlings to 12-15 inches apart.

Feverfew is relatively low-maintenance when it comes to watering, which is great news for Plains gardeners dealing with unpredictable rainfall. Once established, it's quite drought-tolerant, but that doesn't mean you can completely neglect it.

During the hotter summer months, especially when temperatures climb into the 90s, check the soil moisture regularly. Stick your finger about 2 inches deep – if it feels dry, it's time to water. Aim for about an 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 low-to-moderate humidity. Signs of underwatering include wilting leaves and stunted growth. Overwatering, on the other hand, can lead to root rot – look for yellowing leaves and a generally unhappy plant. A light layer of mulch around the base of the plants helps retain moisture and suppress weeds, which is especially helpful in our variable climate.

Deadheading is key to keeping your Feverfew blooming all season long. Simply snip off the spent flowers just below the flower head. This encourages the plant to produce more blooms instead of putting energy into seed production.

Throughout the summer, continue to deadhead regularly. After the main flush of flowering is over, you can cut the plant back by about one-third to encourage a second bloom. As the first frost approaches in mid- October, stop deadheading and let some of the flowers go to seed if you want Feverfew to self-sow. Otherwise, cut the plant back to the ground after the foliage dies back.

You can expect your first Feverfew harvest from late June through late October, about 70 days after planting. The best time to harvest is when the small, daisy-like flowers are in full bloom.

To harvest, simply snip off the stems just above a set of leaves. Handle the leaves gently, as they can sometimes cause skin irritation in sensitive individuals. Harvest regularly to encourage continuous production. As the first frost approaches in mid- October, you can still harvest any remaining flowers and foliage.

Here are three common problems you might encounter with Feverfew in the Great Plains:

Self-seeds prolifically

• What it looks like: Numerous tiny seedlings popping up everywhere in your garden the following spring.
• What causes it: Feverfew is a prolific self-seeder. If you let the flowers go to seed, you'll have a lot of unwanted volunteers. Our variable rainfall can help scatter the seeds widely.
• How to fix/prevent it: Deadhead regularly to prevent seed formation. If you want some self-seeding, let a few flowers go to seed at the end of the season. Remove unwanted seedlings as they appear.

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. Our hot summer temperatures can lead to rapid aphid infestations.
• 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).

Leaf miners

• What it looks like: Pale, winding trails or blotches inside the leaves.
• What causes it: The larvae of small flies tunnel between the upper and lower surfaces of the leaves, feeding on the leaf tissue.
• How to fix/prevent it: Remove and destroy affected leaves. Cover plants with row covers to prevent adult flies from laying eggs. Insecticidal soap or neem oil can help control infestations.

Great Plains Specific Challenges: Our hot heat, low-to-moderate humidity, and variable rainfall can stress Feverfew, making it more susceptible to pests and diseases. Proper watering, good air circulation, and regular monitoring are key to keeping your plants healthy.

Feverfew makes a great companion plant for several garden vegetables and flowers. Tomatoes benefit from Feverfew planted nearby, as it helps repel certain pests. Roses also appreciate Feverfew's company, as it deters aphids and other rose pests. Many herbs, like rosemary and sage, thrive alongside Feverfew, as they share similar growing requirements and attract beneficial insects.

Avoid planting Feverfew near members of the cabbage family, as it can attract cabbage white butterflies, whose larvae can decimate your brassicas.