cutting onco seeds - forced germination

Jane McGary
Sat, 15 Nov 2014 16:48:36 PST
Peter wrote:
>With the right amount of moisture  they are all evergreen, but to attempt
>to maintain that level of moisture in a hot Summer is risky. The moisture
>is good if deep down at the roots, but if it rises to the rhizome while
>there is heat, the plant will succumb to bacterial rot. If the foliage is
>warm and wet it will get 'rust'.

That helps to explain why my aril irises are doing so well now that 
they are "loose" in covered but fully ventilated raised sand beds. 
There is some capillary action that brings moisture up from the 
subsoil, which is separated from the sand only by a woven groundcloth 
to keep out moles. Juno irises are also responding very well to this 
new home. The foliage is never warm and wet here; indeed that is a 
rule I follow with almost all my geophytes.

Jane McGary
Portland, Oregon, USA

More information about the pbs mailing list