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Crocuses or Croci?

Published on March 3rd 2019
by Jo.Baker (All rights reserved)
A square planter filled with purple crocus
Having a youngster currently going through school means I am constantly being re-educated on English grammar. A quick fact check, and I can confidently say the plural for Crocus is crocus or crocuses (inflected form) or croci (although it's a borrowed Latin word). I tend to use crocuses.
Any way you choose to describe them, they are beautiful. At a time of year when everything else is muted, their bright colour draws our attention (and the insects) and lightens the heart.
A bee covered in yellow pollen inside the purple flower of a crocus.
This queen white-tailed bumblebee was taking advantage of the late February sunshine


Crocus comes from the Greek κρόκος (krokos), which is believed to trace back to a word from the ancient India language Sanskrit, "kunkumam" (कुङ्कुमं) for "saffron."
There are over 90 species in the Crocus genus that may have been cultivated by humans as early as the Bronze age. Originally used as a spice throughout the Mediterranean, Middle East, Central Asia, and Western China, they started to be cultivated in the 16th century for ornamental gardens.
A close up of the purple, yellow and red flowers of Saffron crocus
Image by Johan Puisais from Pixabay


Crocus sativus is the Autumn flowering species grown for the spice trade. The red stigmas are hand-picked and then dried to produce saffron. Per gram, it is more expensive than gold.
The corm is believed to have originated in Greece as a mutant form of the wild C. cartwrightianus species. This species is self-incompatible as well as male sterile. As a result, propagation has to be done by dividing the corms by hand.
A glass jar with saffron ribbons inside in front of a black background.
Image by Ulrike Leone from Pixabay
Saffron can be used as a spice to flavour and colour food, as well as in herbal medicines to tackle a range of symptoms such as coughs and sore throats. It may also alleviate anxiety and depression and act as an aphrodisiac. Extracts of saffron are also used as a dye for cloth and as a fragrance in perfumes.
Frustratingly for me, I can never get this crocus to flower again after the first year of planting, and I do like adding it to Paellas.
A close up of a group of white, yellow and purple crocus flowers growing in a garden.
Image by Karsten Paulick from Pixabay

In the Garden

Having been brought back from Constantinople in 1560 by the Holy Roman Emperor's ambassador Ogier Ghiselin de Busbecq, corms were sent to Leiden's botanical garden (Netherlands), where they were rapidly cultivated and hybridised.
This is a blessing to us as their continuing popularity means it is possible to choose varieties that will provide flowers from Autumn until Spring. Here are just a few:
  • Crocus kotschyanus (zonatus), pale lilac-pink flowers (September). Ideal for naturalising.
Crocus kotschyanus between paving stones

Kotschy's Crocus

Crocus kotschyanus

  • Crocus medius, lilac-purple flowers (October-November). Now known as Crocus nudiflorus:
  • Crocus ochroleucus, creamy-white flowers with an orange base (November, December).
  • Crocus tommasinianus, dainty blue-violet flowers (January to February). Good for naturalising (self-seeds freely). Ideal for the rock garden.
  • Crocus chrysanthus, golden-yellow rounded flowers (January to March). Good rock-garden plants.
  • Crocus vernus (Dutch crocus) shades of purple and lilac flowers (early to late spring).
A close up of two yellow buds of a crocus plant.
Image by S.Hermann & F. Richter from Pixabay


Location is the key to getting this genus to naturalise as they prefer full sun with free-draining but fertile soil. Ideal for rock gardens, they are also easily grown in containers.
Autumn flowering types need to be planted in early summer, where the bulbs will be baked throughout the summer. Winter and spring-flowering varieties need to be planted in autumn. All need to be planted at least 3cm deep.
Give the plant a feed with a slow-release fertiliser during the growing period. If you are trying to get the plant to naturalise through grass, avoid cutting until the foliage has died back entirely.
My last planting of Saffron bulbs produced leaves last autumn but didn't produce flowers. So, I'm off to relocate them to a different spot in the allotment and hope they provide this year. But I'll have to be quick when they do. Harvesting by hand the morning, the flowers open gets the best flavour.
Any tips for a bumper crop would be gratefully received!

It's never a bad time to buy bulbs:

Spring Bulbs to Plant Now

Tulip 'Seadov' - 10 Bulbs - 10/11cm
50 x Mega Mix Tulips bulbs
Mixed Crocus - 10 Bulbs - 5/7cm
Mixed Freesia - 12 Bulbs - 5cm up
Mixed Lily-Flowered Tulip - 7 Bulbs - 10/11cm
Pink Bedding Hyacinth - 3 Bulbs - 14/15cm

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