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Tickseed: Coreopsis grandiflora Sunray

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Tickseed: Coreopsis grandiflora Sunray

Tickseed's double, deep-yellow flowers with unevenly cut petals bloom continuously throughout the season. Often grown as an annual, its sunny flowers are excellent for cutting and are attractive to bees.

Profile

Plant typeperennial
Hardiness zones4 to 9
Lightfull-sun
Height2 ft.6 in. to 3 ft.
Spread up to 2 ft.6 in.
Habitmounding
Bloom timefall,summer
Flower coloryellow
Bloom size2.5 in. to 2.5 in.
Foliage colormedium-green
Foliage size4 in. to 4 in.

did you know?

The genus name is derived from the Greek meaning bug, and meaning like, and refers to the buglike appearance of the small, rounded seeds. The common name, tickseed, refers to the same characteristic.

general maintenance:

Shear back plants after first wave of flowering to promote reblooming. Deadhead spent flowers as they fade. Remove old foliage after frost or before new growth in spring.

pests/diseases:

Slugs, snails, rust, gray mold and powdery mildew may occur.

controls:

Handpick slugs and snails from foliage, or spread diatomaceous earth around plants. To control gray mold and powdery mildew, remove infected flowers and foliage. Increase spacing between plants to improve air circulation, and reduce watering.

how to sow/plant:

Set out new plants or divisions. Choose a sunny site with well-drained soil amended with well-rotted manure or compost. Plant 16?18 inches apart. Water after planting.

water and fertilize:

Monitor soil moisture all season. Apply a balanced, soluble fertilizer biweekly, following label instuctions.

garden hint:

Divide tickseed in spring every 3?5 years. Compost woody centers, and replant younger, more vigorous outer portions of plant.

features:

  • Attractive Flowers
  • Attractive Foliage
  • Native

garden uses:

  • Containers
  • Flowerbed borders

other uses:

  • Cut Flower

combine with:

delphinium, Siberian iris ('Caesar's Brother'), and wormwood ('Valerie Finis').

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