Updated: June 28, 2023

When it comes to planning and designing a garden, one of the key considerations is the spacing between plants. Proper spacing allows each plant to grow and thrive, ensuring optimal health and beauty for the entire garden. This holds true for yarrow plants as well. Yarrow (Achillea millefolium) is a popular perennial plant known for its beautiful flowers and aromatic foliage. To ensure the best growth and overall appearance of your yarrow plants, it is essential to understand how much space to leave between each plant.

The Growth Habit of Yarrow Plants

Before determining the spacing between yarrow plants, it is important to understand their growth habit. Yarrow is a spreading perennial that forms dense clumps over time. It features long, slender stems topped with flat clusters of tiny flowers in various colors, including white, yellow, pink, and red.

Yarrow plants have a moderate growth rate and can reach a height of 1 to 3 feet, depending on the variety. They typically spread through underground rhizomes, forming new plants in close proximity to the parent plant. This natural spreading habit should be taken into account when deciding on the spacing between yarrow plants.

Spacing Recommendations for Yarrow Plants

The recommended spacing between yarrow plants depends on several factors, including the variety of yarrow, the desired appearance, and the growing conditions. However, a general guideline is to leave approximately 18 to 24 inches of space between each plant.

This spacing allows enough room for the plants to spread and fill out while preventing overcrowding. Adequate spacing also ensures good air circulation, reducing the risk of diseases that can occur in humid or crowded conditions.

If you prefer a more compact appearance or have limited space in your garden, you can reduce the spacing between yarrow plants to around 12 inches. However, keep in mind that this may result in faster and denser spreading of the plants, requiring more frequent maintenance to prevent overcrowding.

On the other hand, if you want to create a more natural and wildflower-like effect, you can increase the spacing between yarrow plants up to 36 inches. This wider spacing allows each plant to have more space to spread and showcase its individual beauty.

Considerations for Specific Yarrow Varieties

Different yarrow varieties may have specific spacing requirements based on their growth habit and characteristics. Here are a few examples:

  1. Achillea millefolium ‘Paprika’: This variety of yarrow has vibrant red flowers and reaches a height of about 18 inches. It is recommended to leave around 12 to 18 inches of space between each plant to allow it to spread and create a full, colorful display.

  2. Achillea millefolium ‘Moonshine’: ‘Moonshine’ yarrow features bright yellow flowers and grows slightly taller, reaching about 24 inches in height. Providing 18 to 24 inches of space between each plant will ensure proper growth and an attractive appearance.

  3. Achillea millefolium ‘Summer Pastels’: ‘Summer Pastels’ is a yarrow variety that produces flowers in various pastel shades, including pink, lavender, and white. It grows up to 30 inches tall and requires spacing of 24 to 36 inches to allow each plant’s unique colors to shine.

It is essential to research the specific variety of yarrow you are planting and consider its growth habit when determining the spacing between plants. This will help you achieve the desired aesthetic and ensure optimal growth for your yarrow garden.

Other Factors to Consider

In addition to spacing, there are other factors that can impact the growth and health of yarrow plants. These include soil conditions, sunlight exposure, and watering practices.

Yarrow plants thrive in well-draining soil with a pH level ranging from slightly acidic to slightly alkaline. Ensure that the soil is fertile and enriched with organic matter to provide the necessary nutrients for healthy growth.

Yarrow plants prefer full sun, so choose a planting location that receives at least 6 to 8 hours of direct sunlight per day. Insufficient sunlight can result in leggy growth and reduced flower production.

Proper watering is crucial for yarrow plants, especially during their establishment period. Water deeply but infrequently to encourage deep root growth. Once established, yarrow is relatively drought-tolerant and requires minimal supplemental watering.

Conclusion

Determining the appropriate spacing between yarrow plants is essential for their proper growth and overall appearance in your garden. By considering the growth habit of yarrow, specific variety requirements, and desired aesthetic, you can create a beautiful and thriving yarrow garden. Remember to also consider other factors like soil conditions, sunlight exposure, and watering practices to ensure optimal health for your yarrow plants. With the right spacing and care, your yarrow garden will be a stunning addition to your landscape.