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Petrocosmea rosettifolia

PostPosted: August 29th, 2011, 10:49 am
by illustrator
I grow P. rosettifolia for some years now, but it is puzzling to me. First I had difficulties with propagation, I noticed that the leaves rot very easily and you have to keep them rather dry, after that, it is no problem (just 1 plant per leaf seems to be the rule, not many as with violets).

But now I can grow them, and propagate them, and they look nice and healthy, but they never flower. I gave some away, which flowered a few weeks later! Clearly, they miss some kind of trigger, like a change in temperature or so. I tried putting one outside for some weeks last year, it survived (with some sunburn), but it didn't flower. (I have really cold nights, right now it gets to 10 degrees, even when the daytime temperature is 25-30 degrees).

Re: Petrocosmea rosettifolia

PostPosted: August 29th, 2011, 11:20 pm
by Lola
My P. rosettifolia during 3 year never flowered but P. barbata, P. flaccida, P. forrestii, P. Momo, HT-2 flowered every year. Maybe need more light for her.

Re: Petrocosmea rosettifolia

PostPosted: September 13th, 2011, 2:17 pm
by Valkiria
P. rosettifolia

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Lola's plant.

Re: Petrocosmea rosettifolia

PostPosted: September 13th, 2011, 2:20 pm
by Valkiria
And this are my leaves, received from Paul from Slovenia (thanks again).

They now have bigger babies. But I am just happy that they are alive. :lol:

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Re: Petrocosmea rosettifolia

PostPosted: September 14th, 2011, 12:50 am
by illustrator
just keep them on the dry side, there is still a risk that they will rot and the babies have to struggle a lot if their mother-leaf dies too soon ...

Eventually the leaf will die, you don't have to separate them as there is usually only one plantlet on each leaf. So they will not be in the way of each other like violet plantlets.

Re: Petrocosmea rosettifolia

PostPosted: September 14th, 2011, 11:29 am
by Valkiria
I will remember your advice, Paul. Now the babies a little bit bigger. ;)

Re: Petrocosmea rosettifolia

PostPosted: November 28th, 2011, 3:54 pm
by Laci
Mine is developping flower buds!! happy02:

Re: Petrocosmea rosettifolia

PostPosted: November 29th, 2011, 3:46 pm
by Valkiria
Wow, Laci!
How much it took, form leaves to flowers? Or from baby to flower?

Re: Petrocosmea rosettifolia

PostPosted: November 29th, 2011, 9:41 pm
by Laci
I got it as a baby in August as I remember. So It is 3 months.
I grow it under artificial light.

Re: Petrocosmea rosettifolia

PostPosted: December 2nd, 2011, 12:55 pm
by Valkiria
That is really quickly!
My little babies from the leaves in upper pictures are doing well. Hope they will bloom in a year...or maybe quicker.

Re: Petrocosmea rosettifolia

PostPosted: December 16th, 2011, 8:52 pm
by SvetlanaBG
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Re: Petrocosmea rosettifolia

PostPosted: December 19th, 2011, 12:45 pm
by Valkiria
That's incredible beautiful! love:

Re: Petrocosmea rosettifolia

PostPosted: October 26th, 2016, 11:57 pm
by Gabi_Munich
Here petrocosmea rosettifolia is growing at Munich Botanical Garden.

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Re: Petrocosmea rosettifolia

PostPosted: March 18th, 2018, 2:35 am
by illustrator
This is nowadays Petrocosmea cryptica