Acaena

Description

Acaena, commonly known as the “buzzy burr”, is a genus of over 100 species of perennial herbs native to South America, New Zealand, and Australia. They are hardy, low-growing plants that produce small, spiky flowers and seed heads that resemble small burrs. Acaena plants are known for their attractive foliage, which can range in color from green to purple and is often deeply serrated or lobed.

Taxonomic Information

Appearance

Acaena plants are low-growing, mat-forming perennials that range in height from 5-30cm. They produce small, spiky flowers in shades of white, pink, or red, and small seed heads that resemble burrs. The foliage can range in color from green to purple and is often deeply serrated or lobed. Acaena plants are known for their hardiness and adaptability, making them a popular choice for rock gardens and groundcovers.

Care Guide

Water: Acaena plants prefer well-drained soil and do not like to be overwatered. Water deeply once a week, and allow the soil to dry out slightly between waterings.

Fertilization: Acaena plants do not require frequent fertilization. Apply a balanced fertilizer once in the spring and once in the fall.

Soil: Acaena plants prefer well-drained soil that is rich in organic matter. They are tolerant of a wide range of soil types, but do not like to be waterlogged.

Sunlight: Acaena plants prefer full sun to partial shade. They can tolerate some shade, but may become leggy if grown in too much shade.

Hardiness Zones: Acaena plants are hardy in zones 4-9.

Common Pests & Diseases

Acaena plants are generally hardy and resistant to pests and diseases. However, they may occasionally be affected by spider mites or aphids. These pests can be controlled with insecticidal soap or neem oil. Acaena plants may also be susceptible to root rot if overwatered, so be sure to provide well-draining soil and avoid overwatering.

Habitat

Acaena plants are native to South America, New Zealand, and Australia. They are found in a variety of habitats, including grasslands, forests, and wetlands. Acaena plants are known for their hardiness and adaptability, making them a popular choice for landscaping and gardening.

Question and Answer

Q: Are Acaena plants invasive?

A: Acaena plants can be invasive in some areas, particularly in wetlands or areas with disturbed soil. Check with your local extension office before planting Acaena to ensure it is not considered invasive in your area.

Q: Can Acaena plants be grown in containers?

A: Yes, Acaena plants can be grown in containers. Use a well-draining potting mix and be sure to water regularly.

Q: How often should I fertilize my Acaena plants?

A: Acaena plants do not require frequent fertilization. Apply a balanced fertilizer once in the spring and once in the fall.

Q: What is the best way to propagate Acaena plants?

A: Acaena plants can be propagated by division or by taking stem cuttings in the spring. Seeds can also be sown directly in the garden in the fall.

Related Plants

• Alchemilla
• Artemisia
• Asplenium
• Athyrium
• Campanula

References

• “Acaena.” Wikipedia, Wikimedia Foundation, 3 Sept. 2021, en.wikipedia.org/wiki/Acaena.
• “Acaena microphylla.” Missouri Botanical Garden, www.missouribotanicalgarden.org/PlantFinder/PlantFinderDetails.aspx?kempercode=b430.
• “Acaena.” Royal Horticultural Society, www.rhs.org.uk/plants/search-results?query=acaena.