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Yarrow (Achillea millefolium) is a hardy perennial plant known for its feathery leaves and clusters of colorful flowers. It is a popular choice among gardeners for its drought tolerance and ability to attract beneficial insects. Proper fertilization is essential to ensure healthy growth and vibrant blooms. Understanding the right timing and method for fertilizing yarrow can make a significant difference in your garden’s success.
Why Fertilize Yarrow?
While yarrow is a resilient plant that generally requires minimal feeding, providing the right nutrients can enhance its growth, improve flower production, and maintain overall plant health. Fertilizing helps replenish soil nutrients that may be depleted over time, especially in garden beds with heavy or continuous planting.
Best Timing for Fertilizing Yarrow
Early Spring
Apply a balanced, slow-release fertilizer in early spring as new growth begins. This provides essential nutrients for the upcoming growing season and encourages strong, healthy leaves and stems.
After Blooming
Fertilize again after yarrow has finished blooming to support root development and prepare the plant for the next season. Use a light application of a balanced fertilizer or compost tea.
Mid-Season (Optional)
If your yarrow appears to be lacking vigor or has sparse flowering, a mid-season feeding with a liquid fertilizer can boost growth. Apply every 4-6 weeks during the active growing period.
Fertilizer Types and Application Tips
- Organic options: Compost, fish emulsion, seaweed extract, or well-rotted manure.
- Inorganic options: Balanced NPK fertilizers (such as 10-10-10).
- Application tips: Follow package instructions for dosage. Avoid over-fertilizing, which can lead to floppy growth and reduced flowering.
Additional Care Tips
Besides fertilizing, ensure yarrow is planted in well-drained soil and receives full sun for optimal growth. Deadhead spent flowers to encourage more blooms and prune back in late fall to maintain a tidy appearance. Mulching around the plant can help retain moisture and suppress weeds.
Conclusion
Fertilizing yarrow at the right times—early spring, after blooming, and optionally mid-season—helps promote vigorous growth and abundant flowering. Using appropriate fertilizers and following proper application techniques will ensure your yarrow thrives and adds beauty to your garden season after season.