Dictionary of Flowers: Coreopsis Grandiflora (Tickseed)

Coreopsis Grandiflora (Tickseed). Image used under a Creative Commons licence with the kind permission of Carl Lewis and Flickr
Pin It

Coreopsis Grandiflora (Tickseed). Image used under a Creative Commons licence with the kind permission of Carl Lewis and Flickr

  • Coreopsis Grandiflora
  • Common name: tickseed
  • Family: Asteraceae
  • Category: annual, perennial in USDA zone 3-9
  • Height: 16" to 36”
  • Width: 12" to 24”
  • Sun/part shade
  • Blooms: summer to early fall
  • Attracts: butterflies
  • Growth: clumping. Used as a filler in container combinations
  • Maintenance: easy
  • Soil: average, well drained. Water regularly if grown in containers. 
  • Garden uses: containers, mixed border, cutting garden, meadow garden
  • Diseases: powdery mildew
  • Pests: slugs and snails in wet weather

Coreopsis grandiflora is actually a short lived perennial to zone 3, but most often it is sold as an annual, since some of the species' varieties bloom the first year when grown from seed.

It is native to North and Central America. It's an easy to grow plant with large yellow daisy-like flowers that can be single, double and semi double.

Some varieties have a mahogany colored band around the eye. The blooms grow on stiff stems over the plant's narrow foliage.

It's a very popular choice for gardens and containers because of its long blooming period. Coreopsis' common name refers to the shape of its seeds, they resemble the shape of a tick.

Tickseed is not fussy about growing conditions. It prefers full sun to part sun, average soil and regular watering. Do not over-water.

It is a low maintenance plant that only requires deadheading to keep it blooming until the frost. Tolerates heat and humidity, sandy or rocky soils.

Fertilize once a year in spring with a slow release formula. Overfertilizing will produce plants that don't bloom as profusely. Divide coreopsis every two to three years if grown as a perennial in fall or early spring.

If seed saving, leave a few blooms on the plant during late summer and allow seeds to mature. Collect and save for next planting season. Tickseed will self seed.

IWILLWRITECAPTION. Image used under a Creative Commons licence with the kind permission of NAMEOFFLICKRUSER and Flickr

To grow from seed, plant seeds on moist starting mix or individual peat pots. Start seeds six weeks before last frost date.

Once the seedlings emerge, place them in a sunny position. Harden off and plant in their permanent location once danger of frost has passed.

Seed can also be sown outdoors, in early spring in colder areas or in the fall, in warmer zones.




IWILLWRITECAPTION. Image used under a Creative Commons licence with the kind permission of NAMEOFFLICKRUSER and Flickr

Coreopsis is virtually disease free. Powdery mildew can happen if plants are over-crowded or when the plant gets stressed. Apply fungicide as needed.

Slugs and snails can attack the plant in wet weather. Bait as needed. Tickseed is deer resistant.

Popular varieties:

  • Coreopsis grandiflora 'Early Sunrise' - compact, semi double yellow flowers with mahogany centers
  • Coreopsis grandiflora hybrid 'Little Sundial' - hybrid, single flowers with mahogany centers. Compact variety
  • Coreopsis grandiflora hybrid 'Tequilla Sunrise' -hybrid, single flowers golden yellow with a red eye. Compact variety with variegated foliage
  • Coreopsis grandiflora 'Presto' - only eight inches high, nice mounding habit. Single and double blooms, golden yellow
  • Coreopsis grandiflora 'Sunray' - double, large blooms, bright yellow. Vigorous variety

IWILLWRITECAPTION. Image used under a Creative Commons licence with the kind permission of NAMEOFFLICKRUSER and Flickr

Full List of Dictionary of Flowers Entries

Annuals For Containers

Perennials For Containers

Go from Coreopsis Grandiflora (Tickseed) to the Dictionary of Flowers

More great ideas for Container Gardening!

Leave Comments

Have your say about what you just read! Leave me a comment in the box below.