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PlantFiles: Ligurian Autumn Crocus
Crocus medius

Family: Iridaceae (eye-rid-AY-see-ee) (Info)
Genus: Crocus (KROH-kus) (Info)
Species: medius (MEED-ee-us) (Info)

6 members have or want this plant for trade.

Alpines and Rock Gardens

under 6 in. (15 cm)

3-6 in. (7-15 cm)

USDA Zone 6a: to -23.3 C (-10 F)
USDA Zone 6b: to -20.5 C (-5 F)
USDA Zone 7a: to -17.7 C (0 F)
USDA Zone 7b: to -14.9 C (5 F)
USDA Zone 8a: to -12.2 C (10 F)
USDA Zone 8b: to -9.4 C (15 F)
USDA Zone 9a: to -6.6 C (20 F)
USDA Zone 9b: to -3.8 C (25 F)

Sun Exposure:
Full Sun

Parts of plant are poisonous if ingested
Handling plant may cause skin irritation or allergic reaction

Bloom Color:

Bloom Time:
Mid Fall


Other details:
This plant is attractive to bees, butterflies and/or birds
Average Water Needs; Water regularly; do not overwater
This plant is resistant to deer
Suitable for growing in containers

Soil pH requirements:
6.1 to 6.5 (mildly acidic)
6.6 to 7.5 (neutral)
7.6 to 7.8 (mildly alkaline)

Patent Information:

Propagation Methods:
By dividing rhizomes, tubers, corms or bulbs (including offsets)

Seed Collecting:
Unknown - Tell us

Click thumbnail
to view:

By Howard_C
Thumbnail #1 of Crocus medius by Howard_C

By pokerino
Thumbnail #2 of Crocus medius by pokerino


1 positive
No neutrals
No negatives

Gardeners' Notes:

Positive Howard_C On Sep 27, 2004, Howard_C from St John's, NL wrote:

Crocus medius is one of the easiest of the autumn flowering crocuses to grow. However, here in St John's Newfoundland (Canadian zone 5b) it is not quite hardy outside, only lasting a year or two. On the other hand, it does very well in a clay pot sunk in sand in an unheated coldframe, contributing to the wonderful view from the window of my basement study during October when it flowers. I think it would do well a zone or two warmer.

The flowers are lilac with brilliant scarlet styles, yellow anthers, and a white throat, and last for two or three weeks, the leaves appearing later. According to Brian Mathew's book "The Crocus" it occurs wild in a fairly small region of NW Italy, mostly in the province of Liguria, and is related to C. nudiflorus (Spain) and C. longiflorus (SW Italy). I find it very difficult to distinguish from C. longiflorus in fact, a problem not helped by one of my suppliers sending me a mixture of the two under one name or the other! Longiflorus is supposed to be scented, have a yellow throat and have leaves starting at flowering time, but I don't think they have read the book themselves! Anyway, they are both lovely little crocuses. I repot every couple of years and usually have a few extra corms to give away to friends each time.


This plant has been said to grow in the following regions:

Little Rock, Arkansas
Garberville, California
Los Altos, California

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