Colchicum 2011

[krisderaeymaeker]

1 - 2. Colchicum montanum in open garden
3. Colchicum montanum under glass
These pics is a proof that the flowering trigger is temperature gradients and not watering. The first one in the open garden have been more or less wet the whole summer while the one under glass have been bone dry. The flowers appeared within two days.
Poul

Very interesting Poul and exactly what I always tought about a lot of Colchicums....I saw them flowering in habitat in places where it was bonedry and the autumnrain was not started yet.

[Arda Takan]

then dry summers trigger flowering?

[mark smyth]

I have a Colchicum in flower. Ian Y's tessellated bulbs

[ArnoldT]

I think there are many triggers for flowering in bulbs.

I've had plants come into growth in the basement with pretty constant temperature and light provided by a HID light on a set schedule.

Colchicum can flower sitting on a shelf without the temp changes or even moisture.

Internal clocks most likely are involved.  An inhibitor is consumed at a slow rate during dormancy.  When the inhibitor is all  gone the flowers come.
Arnold

[pehe]

Internal clocks most likely are involved.  An inhibitor is consumed at a slow rate during dormancy.  When the inhibitor is all  gone the flowers come.

That sounds interesting. I have never heard before.

Poul

[Arda Takan]

I think there are many triggers for flowering in bulbs.

I've had plants come into growth in the basement with pretty constant temperature and light provided by a HID light on a set schedule.

Colchicum can flower sitting on a shelf without the temp changes or even moisture.

Internal clocks most likely are involved.  An inhibitor is consumed at a slow rate during dormancy.  When the inhibitor is all  gone the flowers come.
Arnold

Makes sense...

[fermi de Sousa]

Marcus Harvey of Hillview Rare Plants in Tasmania has a new seed-list which includes some Colchicums; if you want a copy please send me a PM with your e-mail address.
cheers
fermi

[jshields]

I think there are many triggers for flowering in bulbs.

I've had plants come into growth in the basement with pretty constant temperature and light provided by a HID light on a set schedule.

Colchicum can flower sitting on a shelf without the temp changes or even moisture.

Internal clocks most likely are involved.  An inhibitor is consumed at a slow rate during dormancy.  When the inhibitor is all  gone the flowers come.
Arnold

I've seen signs of this in some of my Haemanthus.  They seem to "remember" how long it has been since the last time they flowered.  It also explains how hard it can be to get a bulb to switch hemispheres.

Jim

[Oron Peri]

Just going back to first page in order  to give the correct names.

Fred,  First photo is C. shimperi, second is C. crocifolium and the third is C. fasciculare.
Took me a whole year to get the right ID.




Edit by maggi: refers to these pix
http://www.srgc.org.uk/forum/index.php?topic=6438.msg178855#msg178855

http://www.srgc.org.uk/forum/index.php?topic=6438.msg179535#msg179535:

[BULBISSIME]

Wahooo !
Great Oron ! very good job !
You're not very fast.... but very efficient 
Thank's a lot,, and How did you find the ID ?
we'll talk about it later