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Asteraceae FAMILY

Coreopsis gigantea

Coreopsis gigantea

Edibility
0/5
Medicinal
0/5

Safety & Hazards

None known

Cultivation Details

HabitPerennial
Growth—

Succeeds in ordinary garden soil[1]. Prefers a fertile well-drained moisture retentive medium soil[2, 3]. Requires a sunny position[2, 3]. Established plants are drought resistant[1]. This species is not very cold hardy in Britain, tolerating temperatures down to about -3°c[3, 4]. It dislikes winter wet and so is also apt to die out over the winter if grown on clay soils[2]. It is best grown in a greenhouse in this country[1]. In its native habitat the plant is a shrub or sub-shrub, but the branches die back in Britain where it acts more as a perennial[PFAF]. The cut flowers last well in water[4]. The flowers are loved by bees[4].

Propagation

Seed - sow early spring in a cold frame. When they are large enough to handle, prick the seedlings out into individual pots and plant them out into their permanent positions in the summer[2]. The seed can also be sown in an outdoor seedbed in mid spring. Once they are more than 15cm tall, plant the seedlings out into their permanent positions in the summer. Division in spring or autumn[2]. Very easy, larger clumps can be replanted direct into their permanent positions, though it is best to pot up smaller clumps and grow them on in a cold frame until they are rooting well. Plant them out in the summer or following spring. Cuttings of young basal shoots, May/early summer in a frame[3]. Harvest the shoots when they are about 10cm long with plenty of underground stem. Pot them up into individual pots and keep them in light shade in a cold frame or greenhouse until they are rooting well. Plant them out in the summer. Cite as: Temperate Plants Database, Ken Fern. temperate.theferns.info. 2026-02-20. <temperate.theferns.info/plant/Coreopsis+gigantea>

Pollinators

Bees

References

  1. [1]RHS Dictionary of Plants plus Supplement. 1956 — F. Chittendon. · Oxford University Press · 1951 · ISBN - ↩︎Comprehensive listing of species and how to grow them. Somewhat outdated, it has been replaced in 1992 by a new dictionary (see [ 200 ]).
  2. [2]Popular Hardy Perennials. — Sanders. T. W. · Collingridge · 1926 · ISBN - ↩︎A fairly wide range of perennial plants that can be grown in Britain and how to grow them.
  3. [3]The New RHS Dictionary of Gardening. 1992. — Huxley. A. · MacMillan Press · 1992 · ISBN 0-333-47494-5 ↩︎Excellent and very comprehensive, though it contains a number of silly mistakes. Readable yet also very detailed.
  4. [4]Conservatory and Indoor Plants Volumes 1 & 2 — Phillips. R. & Rix. M. · Pan Books, London. · 1998 · ISBN 0-330-37376-5 ↩︎Excellent photos of over 1,100 species and cultivars with habits and cultivation details plus a few plant uses. Many species are too tender for outdoors in Britain though there are many that can be grown outside.
  5. [5]A California Flora. — Munz P.A. & Keck D.D. · University of California Press; Los Angeles · 1959 · ISBN - ↩︎An excellent flora but no pictures. Not for the casual reader.
  6. [6]Nature's Colors - Dyes from Plants. — Grae. I. · MacMillan Publishing Co. New York. · 1974 · ISBN 0-02-544950-8 ↩︎A very good and readable book on dyeing.
  7. [PFAF]Plants for a Future — pfaf.org ↩︎