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Yarrow (Achillea millefolium) is a hardy perennial that adds color and texture to gardens throughout the growing season. Proper seasonal care ensures its health, vibrant blooms, and longevity. Among the most important tasks is deadheading, which encourages continuous flowering and prevents unwanted self-seeding.
Spring Care for Yarrow
In early spring, prepare your yarrow by removing any winter damage or dead stems. This cleanup promotes healthy growth and helps the plant focus energy on new shoots. Fertilize lightly with a balanced, organic fertilizer to support robust development.
Summer: Deadheading as a Priority
During the summer months, yarrow produces its most vibrant blooms. Regular deadheading is essential to prolong flowering and maintain a tidy appearance. Use clean, sharp scissors or pruning shears to remove spent flower heads just above the first set of healthy leaves.
Deadheading prevents the plant from setting seed, which can redirect energy away from flower production. It also discourages self-seeding, helping you control the spread of yarrow in your garden.
Fall: Preparing for Dormancy
As the growing season winds down, continue deadheading to extend the flowering period. Once the blooms fade and the plant begins to die back naturally, cut back the stems to about 2-3 inches above the ground. This cleanup reduces disease risk and prepares the plant for winter dormancy.
Apply a layer of mulch around the base of the plant to protect the roots during cold months. Remove any remaining debris to prevent pests and diseases from overwintering.
Winter Care and Maintenance
Yarrow generally goes dormant in winter. Minimal intervention is needed, but ensure the mulch remains in place to insulate the roots. In early spring, remove mulch gradually as new growth emerges.
Additional Tips for Yarrow Care
- Ensure good air circulation around the plant to prevent fungal diseases.
- Water yarrow sparingly; it prefers well-drained soil and can tolerate drought once established.
- Divide the plant every 3-4 years in early spring to maintain vigor and control size.
Consistent deadheading and seasonal maintenance will keep your yarrow healthy, vibrant, and a beautiful feature in your garden year after year.