Allium TOW

Lauw de Jager
Wed, 05 Mar 2003 03:34:45 PST
Alberto Castillo a *crit :
. All those Alliums from Mediterranean climate Central Asia demand cold.

Dear All,
 I would like to qualify this statement with a usefull generalisation.
From a growing point of view the genus can be divided in three sections:
1 Mediterranean origin:  A very extended growing period from end of
summer until end of spring. Examples: A cowanii (syn neopolitanum),
triquetrum, zebdanensis, flavum.  Generally less hardy
2 Continental origin: Need a cold period to start the vegtative cycle. 
Growing period mid-winter to early-summer. hardy; majority of the genus:
 A giganteum, moly, karataviensis and many others
3 With rhizomatic storage organ. Almost evergreen summer-flowering (with
a short winterdormant period): examples: A tuberosum, cernuum,
schoenoprasum, senescens.

Many more species can be added and several are intermediate and cannot
be classified as definitely. But it is a useful indicator as how to use
Allium species.

Kind regards
Lauw de Jager 
BULB'ARGENCE, 30300 Fourques, France
Région:  Provence/Camargue, Climat zone: 9a Mediterranean, dr y
July-August, peak rainfall in autumn, minimum temps -3-7°C (28-21F)
Reference vegetation: Arbutus unedo, Olea europeaea,

More information about the pbs mailing list