Overview
Coreopsis grandiflora is a perennial in the genus Coreopsis, part of the Asteraceae family. Coreopsis grandiflora grows best in full sun, and tolerates well-drained and sandy or loamy soils and neutral to slightly acidic pH. Its UK hardiness is rated H7. Suggested uses include borders, wildflower gardens and pollinator gardens. It is native to S US.
About
Coreopsis grandiflora is a perennial in the Asteraceae notable for its large, daisy-like flower heads and summer-long display. It flowers from June to September. Grow it in full sun on a well-drained, sandy or loamy soil with a neutral to slightly acidic pH. It suits borders, wildflower areas and pollinator plantings.
Wikipedia contributors, CC BY-SA 4.0 — Coreopsis grandiflora
About the genus
Coreopsis is a genus of flowering plants in the family Asteraceae. Common names include calliopsis and tickseed, a name shared with various other plants.
Wikipedia contributors, "Coreopsis", CC BY-SA 4.0 — Coreopsis
In the garden
A perennial member of the daisy family, Coreopsis grandiflora carries the common name large-flowered tickseed and is native to the southern United States. In the UK it reliably produces an extended display from June to September when grown in the right position. Select a site in full sun and plant into well-drained, sandy or loamy soil with a neutral to slightly acidic pH. The species tolerates moderate soil moisture and shows drought-tolerant behaviour once established, so avoid waterlogged ground. Its hardiness rating is H7, meaning it is fully hardy and will survive typical UK winters without frost protection when planted in a suitable, free-draining spot. Use Coreopsis grandiflora in mixed borders where a sustained summer sequence is required, in informal wildflower clearings or within pollinator-friendly schemes. It performs well where soils are lighter and exposure is open; in heavier soils improve drainage at planting time. The long June to September flowering period makes it useful for extending summer colour through into early autumn in schemes that favour sun-loving perennials.
Growing conditions
Best soil and position for Coreopsis
- Sunlight
- full sun
- Soil type
- well-drained, sandy or loamy
- Soil pH
- neutral to slightly acidic
- Soil moisture
- moderate, drought tolerant
- Exposure
- full sun
- UK hardiness
- H7
Plant details
Coreopsis grandiflora size, habit and characteristics
- Plant type
- perennial
- Suggested uses
- borders, wildflower gardens, pollinator gardens
- Native to
- S US
Care notes
Pruning and caring for Coreopsis grandiflora
- Cultivation
- easy to grow, prefers well-drained soil, deadhead to prolong bloom
- Pruning
- cut back after flowering to encourage new growth
- Propagation
- seed, division
Frequently asked questions
How do I grow Coreopsis grandiflora?
Easy to grow, prefers well-drained soil, deadhead to prolong bloom.
Where is the best place to plant Coreopsis grandiflora?
Coreopsis grandiflora prefers full sun. It suits full sun positions.
What soil does Coreopsis grandiflora need?
Coreopsis grandiflora grows best in well-drained and sandy or loamy soil. It prefers neutral to slightly acidic soil. Aim for soil that stays moderate to drought tolerant.
How do I prune Coreopsis grandiflora?
Cut back after flowering to encourage new growth.
Is Coreopsis grandiflora hardy in the UK?
Coreopsis grandiflora has an RHS hardiness rating of H7, meaning it is fully hardy throughout the UK, tolerating temperatures below -20°C.
How do I propagate Coreopsis grandiflora?
Seed, division.
More in the Coreopsis genus
- Coreopsistickseed
- Coreopsis grandiflora 'Mayfield Giants'Large-flowered Tickseed
- Coreopsis rosea Twinklebells Sunrise ('P16132')Pink Tickseed
- Coreopsis verticillata 'Ruby Red'Whorled Tickseed
- Coreopsis 'Limerock Ruby'PBR