Oncos 2011

[Janis Ruksans]

I have a tiny piece left of 'Concerto Grosso', without any roots. Any ideas how to stimulate it to grow roots. Also I am scared about keeping it in a pot as I don't know how much is enough water when it is kind of dormant plus how much covering should it have?
Pat

Simply plant it, shallow. It will make roots. Leave it naturally without watering but in soil up to late autumn, and then give one watering before winter starts. Concerto Grosso is quite easy with me.
Janis

[arillady]

Thanks Janis I will plant it out. Now that I have a load of 7ml gravel to place a good layer over the aril beds I feel happier.
37C forecast for Christmas Day - unthinkable for Northern Hemisphere folk I should imagine.

[Lesley Cox]

I have a tiny piece left of 'Concerto Grosso',

Happily, I have lots of 'Concerto Grosso' Bach, Beethoven, Mozart and others.

[Janis Ruksans]

Yesterday I visited Arnis in his greenhouse. His Onco irises stay in quiet small clay pots with rhizomes only half in soil. Only just just moist, more to dry side. He still didn't finished replanting and is very busy now.
I'm growing Onco's on raised beds in soil (not in pots) under greenhouse cover. When I'm harvesting some clump, I'm dividing it and keeping in cardboard box covered with (burried in) dry sand. Regarding stoloniferous species I'm never cutting of stolones, but I'm allowing them to make rosette and only then saparate from mother plant (in following year).
Janis