Updated: June 27, 2023

Yarrow (Achillea millefolium) is a beautiful perennial plant that adds a touch of charm to any garden or landscape. With its delicate, feathery leaves and clusters of colorful flowers, yarrow is not only aesthetically pleasing but also easy to care for. Whether you are a seasoned gardener or just starting out, here are some essential tips on how to care for yarrow plants.

Choosing the Right Location

Yarrow plants thrive in full sun, so it is crucial to choose a location that receives at least six hours of direct sunlight each day. This plant can tolerate a wide range of soil types, but it prefers well-drained soil. If your soil is heavy clay or tends to retain water, amending it with organic matter such as compost will help improve drainage.

Planting Yarrow

Yarrow can be planted either from seeds or nursery-grown transplants. If you choose to start from seeds, sow them directly into the ground in early spring or fall after the last frost. Make sure to lightly press the seeds into the soil without covering them entirely, as they require light to germinate.

If you opt for transplants, dig a hole slightly larger than the root ball and gently place the plant in it. Fill the hole with soil and press down firmly around the base of the plant to remove any air pockets. Water thoroughly after planting to help settle the soil.

Watering

Once established, yarrow plants are relatively drought-tolerant and require minimal watering. Overwatering can lead to root rot and other fungal diseases, so it is important to strike a balance. Water deeply once a week during dry spells, allowing the top inch of soil to dry out between watering sessions.

However, newly planted yarrow plants require more frequent watering until their root systems become established. Water them every two to three days for the first few weeks, then gradually reduce the frequency.

Mulching

Applying a layer of organic mulch around yarrow plants helps retain moisture and suppress weeds. Spread a 2-3 inch layer of mulch, such as wood chips or straw, around the base of the plants, taking care not to cover the stems. Mulching also regulates soil temperature, keeping it cooler during hot summer months and warmer during the winter.

Pruning and Deadheading

Yarrow plants have a long blooming season, typically starting in early summer and lasting until fall. To encourage continuous blooming and prevent the plant from becoming leggy, deadhead the faded flowers regularly. Simply snip off the spent flowers just above a set of leaves or flower buds.

In late fall or early spring, once the yarrow plant has finished flowering for the season, it is beneficial to cut the entire plant back to about 6 inches above ground level. This helps rejuvenate the plant and promotes healthy growth in the following season.

Fertilizing

Yarrow plants are relatively low-maintenance when it comes to fertilization. They do not require heavy feeding, but a light application of balanced fertilizer in early spring can help promote healthy growth and abundant blooms. Choose a slow-release granular fertilizer or use a liquid fertilizer diluted according to package instructions.

Dealing with Pests and Diseases

Yarrow plants are generally resistant to pests and diseases, making them an excellent choice for low-maintenance gardens. However, they can occasionally be affected by aphids or powdery mildew.

To control aphids, spray the affected plant parts with a strong stream of water or use insecticidal soap. Powdery mildew can be prevented by providing good air circulation around the plants and avoiding overhead watering.

Propagation

Yarrow plants can be easily propagated through division or stem cuttings. Dividing established plants every few years not only helps control their size but also rejuvenates them. Dig up the plant and carefully separate the crown into smaller sections, ensuring that each section has a healthy set of roots. Replant the divisions in well-prepared soil and water thoroughly.

Stem cuttings can be taken in early summer when the plant is actively growing. Cut a 4-6 inch stem just below a node, remove the lower leaves, and dip the cut end into rooting hormone. Plant the cutting in a well-draining potting mix and keep it moist until roots develop.

Conclusion

Caring for yarrow plants is relatively easy, making them a popular choice among gardeners of all levels of experience. By providing them with the right growing conditions, regular watering, occasional pruning, and minimal fertilization, you can enjoy the beauty and benefits of yarrow in your garden year after year. So go ahead and add this versatile perennial to your landscape and watch it thrive!