Updated: June 27, 2023

Yarrow (Achillea millefolium) is a versatile and hardy perennial plant that is native to Europe and Asia. It is known for its attractive feathery foliage and clusters of small, colorful flowers. Yarrow is a popular choice among gardeners due to its low maintenance requirements and ability to adapt to various growing conditions. One of the factors that many gardeners consider when choosing plants is the growth rate. In this article, we will explore how quickly yarrow plants grow and what factors can influence their growth.

The Growth Rate of Yarrow

Yarrow plants are known for their rapid growth rate. Once established, they can quickly fill in an area, making them a great choice for filling empty spaces in the garden or creating a natural-looking border. The actual growth rate of yarrow can vary depending on several factors including the variety, growing conditions, and care provided.

On average, yarrow can reach a height of 1 to 3 feet and spread up to 2 feet within a single growing season. This quick growth makes it an excellent option for gardeners who want to create a full and lush landscape in a short amount of time. However, it’s important to note that the growth rate may be slower in the first year as the plant establishes its root system.

Factors Affecting Yarrow’s Growth Rate

While yarrow has a generally fast growth rate, there are several factors that can influence its growth. Understanding these factors can help gardeners optimize the growth of their yarrow plants.

Sunlight

Yarrow plants thrive in full sun conditions. They require at least 6 hours of direct sunlight per day to grow vigorously. Insufficient sunlight can result in weak and leggy growth. If you’re growing yarrow in a shady area, consider relocating it to a sunnier spot or trimming surrounding plants to allow more sunlight to reach the yarrow.

Soil Conditions

Yarrow can tolerate a wide range of soil types, including clay, loam, and sandy soils. However, they prefer well-draining soil with a pH level between 6.0 and 7.5. Poorly drained soil can lead to root rot and hinder the plant’s growth. Before planting yarrow, amend the soil with organic matter to improve drainage and provide essential nutrients.

Watering

Yarrow is a drought-tolerant plant once established. Overwatering can lead to root rot and other fungal diseases. It’s important to water yarrow plants deeply but infrequently, allowing the soil to dry out between waterings. This encourages the development of a strong and extensive root system, which ultimately promotes faster growth.

Fertilization

Yarrow is a relatively low-maintenance plant that doesn’t require heavy fertilization. However, providing some nutrients can enhance its growth rate. Before planting yarrow, incorporate a balanced slow-release fertilizer into the soil. Avoid using high-nitrogen fertilizers as they can promote excessive foliage growth at the expense of flower production.

Pruning

Regular pruning can also influence the growth rate of yarrow plants. Deadheading spent flowers not only improves the plant’s appearance but also encourages it to produce more blooms. Additionally, cutting back the entire plant by one-third in late summer can stimulate vigorous growth and extend the blooming period.

Propagation Methods

In addition to its rapid growth rate, yarrow is relatively easy to propagate through various methods. This allows gardeners to quickly expand their yarrow collection or share plants with friends and neighbors.

Division

Dividing mature yarrow plants is one of the simplest ways to propagate them. In late spring or early fall, dig up the entire plant and carefully separate it into smaller clumps using a sharp knife or shovel. Each clump should have a healthy root system and several leafy stems. Replant the divisions in well-prepared soil and water thoroughly.

Seeds

Yarrow can also be propagated from seeds. Sow the seeds directly into the garden bed in early spring or fall. Prepare the soil by loosening it and removing any weeds. Scatter the seeds evenly over the soil surface and lightly press them into the soil. Keep the soil consistently moist until the seeds germinate, which usually takes about two weeks.

Stem Cuttings

Another propagation method for yarrow is through stem cuttings. In late spring or early summer, select a healthy stem with several sets of leaves. Using a sharp knife or pruning shears, carefully cut the stem just below a node. Remove the lower sets of leaves, leaving only a few at the tip. Dip the cut end into rooting hormone powder and plant it in a container filled with well-draining potting mix. Keep the cutting in a warm and humid environment until roots develop, which usually takes several weeks.

Conclusion

Yarrow plants are known for their rapid growth rate, making them an excellent choice for gardeners looking to quickly fill empty spaces in their landscape. With proper care and attention to factors such as sunlight, soil conditions, watering, fertilization, and pruning, yarrow plants can grow vigorously and reach their full potential within a single growing season. Whether you choose to propagate yarrow through division, seeds, or stem cuttings, you can easily expand your yarrow collection and enjoy the beauty of this versatile perennial plant in your garden.