Cotula

Description

Cotula is a genus of flowering plants in the Asteraceae family, native to New Zealand and Australia. It is commonly known as buttonweed due to its small, button-like flowers. There are over 100 species of Cotula, ranging from annuals to perennials. These plants are perfect for adding diversity to rock gardens, edging, or as groundcovers.

Taxonomic Information

Appearance

Cotula plants have small, rounded leaves that are a bright green color. The leaves are typically no more than 1 inch long and have a soft texture. The flowers are small and button-like, with a diameter of about 0.5 inches. They come in a range of colors, from yellow to pink, white, and even purple.

Care Guide

Cotula plants are relatively low-maintenance and do well in a variety of conditions. Here are some tips for caring for your Cotula:

• Water: Cotula plants prefer moist soil, but make sure not to overwater them as they can be susceptible to root rot. Water them once or twice a week, depending on your climate.
• Fertilization: Cotula plants do not require fertilizer, but you can apply a balanced fertilizer in the spring if you want to encourage growth.
• Soil: Cotula plants prefer well-draining soil that is rich in organic matter. They can tolerate a range of soil pH levels.
• Sunlight: Cotula plants prefer full sun but can tolerate some shade.
• Hardiness Zones: Cotula plants are hardy in zones 9-11.

Common Pests & Diseases

Cotula plants are generally not prone to pests or diseases, but they can be affected by root rot if they are overwatered. Other potential issues include:

• Slugs and snails: These pests can eat holes in the leaves of your Cotula plants. Use slug bait or copper tape to deter them.
• Aphids: These small insects can suck the sap from your Cotula plants and cause stunted growth. Use an insecticidal soap to get rid of them.
• Powdery mildew: This fungal disease can cause a white, powdery coating on the leaves of your Cotula plants. Use a fungicide to treat it.

Habitat

Cotula plants are native to New Zealand and Australia, where they grow in a range of habitats from coastal areas to alpine zones. They are often found in rocky areas or on the edges of streams and rivers.

Question and Answer

Q: Can Cotula plants grow in containers?
A: Yes, Cotula plants can be grown in containers as long as they have well-draining soil and are not overwatered.

Q: Do Cotula plants attract bees?
A: Yes, Cotula plants are attractive to bees and other pollinators.

Q: Can Cotula plants tolerate drought?
A: Cotula plants prefer moist soil, but they can tolerate some drought once they are established.

Q: How often should I prune my Cotula plants?
A: Cotula plants do not require regular pruning, but you can trim them back in the spring if you want to control their size.

Related Plants

• Brachyscome
• Calendula
• Coreopsis
• Dianthus
• Echinacea

References

• “Cotula.” Missouri Botanical Garden, www.missouribotanicalgarden.org/PlantFinder/PlantFinderDetails.aspx?kempercode=b396.
• “Cotula.” PlantNet, plantnet.rbgsyd.nsw.gov.au/cgi-bin/NSWfl.pl?page=nswfl&lvl=gn&name=Cotula.
• “Cotula spp.” Plants for a Future, www.pfaf.org/user/Plant.aspx?LatinName=Cotula+spp.