Feverfew in Zone 9A — Southern California

Feverfew is a fantastic addition to any Southern California garden. Its cheerful daisy-like flowers bring a splash of color, and its herbal properties make it a useful plant to have around. Plus, it attracts beneficial insects, helping to keep your garden healthy and thriving in our mild climate.

While we face challenges like drought and summer heat inland, Feverfew's drought tolerance and adaptability make it a manageable and rewarding plant to grow. With our long 322-day growing season, you can enjoy its blooms for a good portion of the year.

Starting Feverfew indoors is an option, especially if you want a head start on the season, although direct sowing is very effective too. If you choose to start indoors, aim for late November through mid December, about eight weeks before you'd like to transplant.

Use seed trays with a good seed-starting mix, and keep them in a warm, well-lit spot. Bottom watering can help prevent damping-off. Since our spring comes so early, this gives you a jump on blooms.

Transplant your Feverfew seedlings outdoors in late January through late February. Before you do, be sure to harden them off for about a week by gradually exposing them to outdoor conditions.

Choose a sunny spot with well-drained soil, and space the plants 12-15 inches apart. Even in late January, keep an eye on the weather, especially inland, as we can still get cooler nights.

Direct sowing Feverfew is a simple and effective method here in Southern California. You can sow seeds directly into the garden from early February through late September.

Prepare the soil by loosening it and removing any weeds. Sprinkle the seeds lightly over the surface, and gently press them into the soil. Keep the soil consistently moist until the seedlings emerge. Space plants to 12-15 inches apart as they grow.

Feverfew is relatively low-maintenance when it comes to watering, which is a huge plus given our drought-prone climate. Once established, it's quite drought-tolerant. Just be sure to get it going with consistent moisture at first!

During our winter-wet season, you probably won't need to water at all, unless we're experiencing a particularly dry spell. In the hotter months, especially if you're gardening inland where the summer heat can be intense, check the soil moisture regularly. Stick your finger about two inches deep; if it feels dry, it's time to water. Aim for about an inch of water per week during the hottest periods. Water at the base of the plant to avoid fungal issues in our low-to-moderate humidity.

Signs of underwatering include wilting leaves and stunted growth. Overwatering can lead to root rot, so make sure your soil is well-draining. Adding a layer of mulch around the base of the plants will help retain moisture and keep the soil cool, which is especially helpful during our summer heat inland.

Deadheading is key to keeping your Feverfew blooming throughout the season. Simply snip off the spent flowers as they fade to encourage new growth.

You can do this anytime from mid April through late December as the flowers decline. At the end of the season, after the first frost around mid- December, cut the plant back to the ground to tidy it up. Be aware that Feverfew self-seeds readily, so if you don't want it spreading, be diligent about deadheading before the flowers go to seed.

You can expect your first Feverfew harvest starting around mid April and continuing through late December here in Southern California. 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 leaf node. This encourages the plant to produce more flowers. Continue harvesting throughout the season to enjoy a continuous supply of blooms and to attract beneficial insects to your garden. As mid- December approaches, you can still harvest, but the plant's growth will slow down.

Here are some common issues you might encounter with Feverfew in Southern California:

Self-seeds prolifically

• What it looks like: Seedlings popping up everywhere in your garden where you didn't plant them.
• What causes it: Feverfew readily drops its seeds, and our mild winters allow them to germinate easily.
• How to fix/prevent it: Deadhead spent flowers regularly before they go to seed. If you want to save seeds, collect the flower heads just as they begin to dry.

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).

Leaf miners

• What it looks like: Squiggly lines or blotches on the leaves.
• What causes it: The larvae of certain flies and moths burrow into the leaves to feed.
• How to fix/prevent it: Remove and destroy affected leaves. Use row covers to prevent the adult insects from laying eggs on the plants. Neem oil can also be effective.

Southern California Specific Challenges: Our hot, dry summers and occasional Santa Ana winds can stress Feverfew, making it more susceptible to pests. Consistent watering during dry periods and providing some afternoon shade, especially inland, can help keep your plants healthy and resilient. Make sure you're not overwatering in our winter-wet season, especially in clay soils.

Feverfew makes a great companion plant for several reasons. It's particularly beneficial near tomatoes and roses.

• Tomatoes: Feverfew can help repel certain pests that attack tomatoes.
• Roses: It helps deter aphids, which are a common problem for roses.
• Herbs: Planting Feverfew near other herbs can attract beneficial insects that help pollinate and control pests.

Avoid planting it near anything that is very sensitive to root competition, as it can spread quickly.