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Asteraceae FAMILY

Calendula officinalis

Calendula officinalis

Edibility
3/5
Medicinal
4/5

Safety & Hazards

None known

Cultivation Details

HabitAnnual
Growth—

Calendula officinalis originated in the Mediterranean region and can be grown as a summer annual in most parts of the temperate zone. It grows best in areas where annual daytime temperatures are within the range 16 - 26°c, but can tolerate 8 - 30°c[1]. It prefers a mean annual rainfall in the range 500 - 800mm, but tolerates 300 - 2,500mm[1]. An easily grown plant, it succeeds in any well-drained soil[2, 3], though it prefers a good loam and requires a sunny or at least partially sunny position[4, 5, 2, 3]. Plants flower best when they are grown in a poor soil[6]. Prefers a pH in the range 5.5 - 7, tolerating 4.5 - 8.3[1]. There are some named varieties[7]. When well-sited the plant usually self-sows freely and will maintain itself if allowed[8, 4]. The flowers are sensitive to variations in temperature and dampness, closing when it is dark and when rain is expected[9, 10]. Average yield of the dry petals is 200 - 300 kilos per hectare, while yields of the complete inflorence may be 500 - 800 kilos[1]. All parts of the plant are pungently scented[11].

Propagation

Seed - sow in situ from spring to early summer and again in September. The seed germinates best in darkness and usually within 1 - 2 weeks at 21°c[12]. The plant often self-sows freely. Cite as: Temperate Plants Database, Ken Fern. temperate.theferns.info. 2026-02-20. <temperate.theferns.info/plant/Calendula+officinalis>

Pollinators

Bees

References

  1. [1]Ecocrop — http://ecocrop.fao.org/ecocrop/srv/en/home ↩︎Basic information on a wide range of useful plants, plus details of environmental needs where available.
  2. [2]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.
  3. [3]The Encyclopedia of Herbs and Herbalism — Stuart. M. (Editor) · Orbis Publishing. London. · 1979 · ISBN 0-85613-067-2 ↩︎Excellent herbal with good concise information on over 400 herbs.
  4. [4]A Modern Herbal. — Grieve. · Penguin · 1984 · ISBN 0-14-046-440-9 ↩︎Not so modern (1930's?) but lots of information, mainly temperate plants.
  5. [5]Edible Ornamental Garden. — Bryan. J. and Castle. C. · Pitman Publishing · 1976 · ISBN 0-273-00098-5 ↩︎A small book with interesting ideas for edible plants in the ornamental garden.
  6. [6]Garden Plants Valuable to Bees. — International Bee Research Association. · International Bee Research Association. · 1981 · ISBN - ↩︎The title says it all.
  7. [7]Cornucopia - A Source Book of Edible Plants. — Facciola. S. · Kampong Publications · 1990 · ISBN 0-9628087-0-9 ↩︎Excellent. Contains a very wide range of conventional and unconventional food plants (including tropical) and where they can be obtained (mainly N. American nurseries but also research institutes and a lot of other nurseries from around the world.
  8. [8]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 ]).
  9. [9]Encyclopaedia of Medicinal Plants. — Chiej. R. · MacDonald · 1984 · ISBN 0-356-10541-5 ↩︎Covers plants growing in Europe. Also gives other interesting information on the plants. Good photographs.
  10. [10]Herbs — Phillips. R. & Foy. N. · Pan Books Ltd. London. · 1990 · ISBN 0-330-30725-8 ↩︎Deals with all types of herbs including medicinal, culinary, scented and dye plants. Excellent photographs with quite good information on each plant.
  11. [11]Scented Flora of the World. — Genders. R. · Robert Hale. London. · 1994 · ISBN 0-7090-5440-8 ↩︎An excellent, comprehensive book on scented plants giving a few other plant uses and brief cultivation details. There are no illustrations.
  12. [12]Growing from Seed. Volume 3. — Bird. R. (Editor) · Thompson and Morgan. · 1989 · ISBN - ↩︎Very readable magazine with lots of information on propagation.
  13. [13]Complete Guide to Herbs. — Holtom. J. and Hylton. W. · Rodale Press · 1979 · ISBN 0-87857-262-7 ↩︎A good herbal.
  14. [14]The Herb Book. — Lust. J. · Bantam books · 1983 · ISBN 0-553-23827-2 ↩︎Lots of information tightly crammed into a fairly small book.
  15. [15]Famine Foods listed in the Chiu-Huang Pen-ts'ao. — Reid. B. E. · Southern Materials Centre; Taipei · 1977 · ISBN - ↩︎A translation of an ancient Chinese book on edible wild foods. Fascinating.
  16. [16]Medicinal Plants of China — Duke. J. A. and Ayensu. E. S. · Reference Publications, Inc. · 1985 · ISBN 0-917256-20-4 ↩︎Details of over 1,200 medicinal plants of China and brief details of their uses. Often includes an analysis, or at least a list of constituents. Heavy going if you are not into the subject.
  17. [17]Dictionary of Economic Plants. — Uphof. J. C. Th. · Weinheim · 1959 · ISBN - ↩︎An excellent and very comprehensive guide but it only gives very short descriptions of the uses without any details of how to utilize the plants. Not for the casual reader.
  18. [18]Sturtevant's Edible Plants of the World. — Hedrick. U. P. · Dover Publications · 1972 · ISBN 0-486-20459-6 ↩︎Lots of entries, quite a lot of information in most entries and references.
  19. [19]The Vegetable Garden. — Vilmorin. A. · Ten Speed Press · ISBN 0-89815-041-8 ↩︎A reprint of a nineteenth century classic, giving details of vegetable varieties. Not really that informative though.
  20. [20]Rare Vegetables for Garden and Table. — Organ. J. · Faber · 1960 · ISBN - ↩︎Unusual vegetables that can be grown outdoors in Britain. A good guide.
  21. [21]A - Z of Companion Planting. — Allardice.P. · Cassell Publishers Ltd. · 1993 · ISBN 0-304-34324-2 ↩︎A well produced and very readable book.
  22. [22]The Encyclopedia of Medicinal Plants — Chevallier. A. · Dorling Kindersley. London · 1996 · ISBN 9-780751-303148 ↩︎An excellent guide to over 500 of the more well known medicinal herbs from around the world.
  23. [23]Edible and Medicinal Plants. — Launert. E. · Hamlyn · 1981 · ISBN 0-600-37216-2 ↩︎Covers plants in Europe. a drawing of each plant, quite a bit of interesting information.
  24. [24]The Dictionary of Modern Herbalism. — Mills. S. Y. ↩︎An excellent small herbal.
  25. [25]The Complete Homeopathy Handbook. — Castro. M. · Macmillan. London. · 1990 · ISBN 0-333-55581-3 ↩︎A concise beginner's guide to the subject. Very readable.
  26. [26]Commonsense Compost Making. — Bruce. M. E. · Faber · 1977 · ISBN 0-571-09990-4 ↩︎Excellent little booklet dealing with how to make compost by using herbs to activate the heap. Gives full details of the herbs that are used.
  27. [27]The National Non-Food Crops Centre Crop Database — http://www.nnfcc.co.uk/crops/pd.cfm ↩︎An excellent on-line information source, with information on over 100 species (as of 2006) of plants being investigated as bio-crops.
  28. [PFAF]Plants for a Future — pfaf.org ↩︎