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Yarrow (Achillea millefolium) is a popular perennial known for its vibrant clusters of flowers and its ability to attract beneficial insects. When planning a garden, many gardeners consider combining yarrow with other perennials to create a diverse and colorful landscape. Proper division practices are essential to ensure healthy growth and longevity of yarrow and its companion plants.
Understanding Yarrow and Its Growth Habits
Yarrow is a hardy, drought-tolerant perennial that spreads through both roots and seeds. It typically grows in clumps and can become quite dense over time. Regular division helps maintain its vigor, prevent overcrowding, and promote better flowering. Knowing the growth habits of yarrow and its companion perennials is key to successful planting and division.
Best Perennials to Combine with Yarrow
- Black-eyed Susan (Rudbeckia): Bright yellow flowers that complement yarrow’s colors.
- Lavender (Lavandula): Adds fragrance and attracts pollinators.
- Coreopsis: Offers cheerful blooms and similar growing conditions.
- Salvia: Provides vertical interest and attracts hummingbirds.
- Russian Sage (Perovskia): Its silvery foliage contrasts nicely with yarrow’s foliage.
Division Timing and Techniques
The best time to divide yarrow is in early spring or late fall, when the plant is not actively flowering. Proper division involves carefully digging up the clump, separating it into smaller sections, and replanting promptly. Use a sharp knife or garden spade to divide the root ball into sections that have at least one healthy shoot and root system.
Step-by-Step Division Process
- Water the plant thoroughly a day before dividing to reduce stress.
- Use a garden fork or spade to carefully lift the entire clump from the ground.
- Gently shake off excess soil to expose the root system.
- Divide the clump into smaller sections using a sharp knife or spade, ensuring each has roots and shoots.
- Replant divisions at the same depth they were growing before.
- Water well after planting and mulch to retain moisture.
Tips for Successful Division and Companion Planting
To maximize the health of yarrow and its companions, consider the following tips:
- Ensure all plants have similar sunlight and soil requirements.
- Maintain good air circulation to prevent disease.
- Space plants adequately to allow growth and easy division.
- Apply mulch to conserve moisture and suppress weeds.
- Divide yarrow every 3 to 4 years to keep it vigorous.
Conclusion
Combining yarrow with other perennials can create a stunning, low-maintenance garden. Regular division ensures that yarrow remains healthy and vigorous, providing a beautiful backdrop for its companions. With proper timing and technique, dividing yarrow and planting it alongside suitable perennials can lead to a thriving, diverse garden space that blooms year after year.