Coreopsis Plant Growing & Care Guide for Gardeners

Article by Dean Ravenscroft, Ph.D. - Updated 22nd Nov 2023

In this Gardener's HQ guide, we'll explore cultivating Coreopsis plants in your garden, indoor spaces, and other settings.

Tickseed, Calliopsis, Pot of Gold, & Sea Dahlia: Cultivation & Garden Use

Plants from the Coreopsis genus are very versatile and are available as half hardy annuals, half hardy perennials or as hardy perennials.

Coreopsis palmata - Prairie Coreopsis by GMayfield10.

The plants have a few common names, these include Calliopsis and Tickseed.

They usually bloom with daisy like flowers of yellow or orange from summer to the early part of autumn.

Coreopsis by Ancapron.

Coreopsis can reach anything from 20 cm to 90 cm (8 to 36 inches) in height; this makes the plant very versatile, smaller plants can be used in a rock garden, whereas larger varieties can be used in the border.

How to Grow Tickseed and other members of the Coreopsis Genus

If planning to start Coreopsis plants from seeds outside then they should be sown onto the soil surface in a well drained and sunny area of the garden.

The seeds should be sown after the last frost of spring. Ideally the soil should be rich and have a pH of between 5.5 and 7.

If you first plan to grow Tickseed seedlings indoors then they generally should be prepared about 8 weeks before you plan to put them out.

Perennial varieties of Coreopsis should be planted out in either autumn or after the last frost of spring; annuals should be planted out after the last frost of spring.

Germination usually takes from one to four weeks, and should be done at a temperature of 13 to 21 degrees Centigrade (55 to 70°F) in the light.

Caring for Tickseed - Coreopsis

Once growing Tickseed is fairly easy to look after, though they do require to be dead headed, and a regular fertilisation.

If you require more plants then either wait for more seed, or divide the perennial varieties of Coreopsis in the autumn.

Common Questions

How many members does the Coreopsis genus have?

The Coreopsis genus consists of around 80 species, many of which are known for their vibrant, daisy-like flowers.

Do members of Coreopsis make a good garden or landscaping plant?

Yes, Coreopsis, also known as Tickseed, is a popular choice for gardens due to its cheerful, long-blooming flowers and easy care.

Which Coreopsis species are most frequently grown by gardeners?

The most frequently grown species is Coreopsis grandiflora (Large-flowered Tickseed), appreciated for its bright yellow flowers.

Are members of the Coreopsis plant genus fragrant?

No, Coreopsis plants are generally not known for their fragrance. Their main attractions are their bright and long-lasting blooms.

What is the perfect location to grow Coreopsis?

Coreopsis prefers full sun and well-drained soil. They are drought-tolerant once established, making them a great choice for sunny, dry areas.

Is Coreopsis invasive in the USA?

Currently, Coreopsis is not considered invasive in the USA. However, some species can self-seed prolifically under optimal conditions.

How do I remove Coreopsis plants from my garden?

Coreopsis plants can be removed by hand-pulling or digging, making sure to remove as much of the root system as possible.

Summary

The Coreopsis genus, part of the Asteraceae family, is native to North and South America. These perennial or annual plants, commonly known as tickseed, are recognized for their daisy-like flowers in a variety of colors that bloom from summer to fall.

To cultivate Coreopsis, plant them in a sunny location with well-drained soil. They can be grown from seeds or plants, and once established, spread rapidly. Regular watering is necessary, but they are quite drought-tolerant. Deadheading spent flowers can promote prolonged blooming. They are often used in borders, containers, or as cut flowers.

I hope that you enjoyed this guide on how to grow Coreopsis plants. You may also enjoy the following Gardener's HQ Asteraceae growing guides: How to grow Gerbera and Townsendia plants.