Overview

Coreopsis grandiflora 'Mayfield Giants' is a perennial in the genus Coreopsis, part of the Asteraceae family. Coreopsis grandiflora 'Mayfield Giants' 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 H5. Suggested uses include borders, wildflower gardens and pollinator gardens. It is native to Maine, Missouri, Pennsylvania, South Carolina, Kansas, New Mexico, Oklahoma and Georgia.

About

Coreopsis grandiflora 'Mayfield Giants' is a perennial in the Asteraceae with notably large, yellow composite flowers. Plants commonly reach over 60 cm (2 ft) and form clumps of flowering stems. In the UK it blooms from June to September and is visited by bees and butterflies. Its natural habitats include open ground such as prairies and roadsides, which informs its cultural needs.

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

Coreopsis grandiflora 'Mayfield Giants' is a North American perennial in the daisy family (Asteraceae), traditionally found in open habitats such as prairies, glades and roadsides in eastern Canada and much of the United States. The specific epithet grandiflora refers to the large flower heads made up of yellow rays and a central disc. Plants frequently exceed 60 cm (2 ft), producing a succession of blooms through the summer. Give this coreopsis a sunny, open position with free-draining soil; its wild origins on open ground suit soils that do not remain waterlogged. It will tolerate some light shade but flowers most freely in full sun. Expect bloom from June to September, and note the flowers are attractive to bees and butterflies, making the cultivar useful in pollinator mixes. Use 'Mayfield Giants' where the height will be visible — sunny mixed borders, meadow-style plantings or informal roadside strips mirror its native setting. Allow space for its clump of stems so the large, daisy-like heads sit clear of surrounding foliage; as the season progresses the extended display of yellow flowers provides a sustained resource for pollinators.

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, well-drained

Aspect

south-facing

Exposure

open

UK hardiness

H5

Plant details

Coreopsis grandiflora 'Mayfield Giants' size, habit and characteristics

Plant type

perennial

Suggested uses

borders, wildflower gardens, pollinator gardens

Native to

Maine, Missouri, Pennsylvania, South Carolina, Kansas, New Mexico, Oklahoma, Georgia

Care notes

Pruning and caring for Coreopsis grandiflora 'Mayfield Giants'

Cultivation

Prefers well-drained soil and full sun; drought tolerant once established; avoid waterlogging

Pruning

Deadhead spent flowers to prolong blooming; cut back in late autumn

Propagation

seed, division

Frequently asked questions

More in the Coreopsis genus

• 
  Coreopsistickseed
• 
  Coreopsis rosea Twinklebells Sunrise ('P16132')Pink Tickseed
• 
  Coreopsis verticillata 'Ruby Red'Whorled Tickseed
• Coreopsis 'Limerock Ruby'PBR