Oncocyclus irises in the Pacific Northwest

Jane McGary janemcgary@earthlink.net
Sat, 28 Apr 2018 10:41:27 PDT
Iris species of the Oncocyclus section are extremely beautiful with 
their prominently markings, large dark spots on the falls and strongly 
veined standards. In the USA they're mostly grown in the Southwest, and 
not much in the Pacific Northwest with its very wet fall, winter, and 
spring weather. I've grown one species (Iris kirkwoodii) and several 
hybrids for years under cover, but summer before last I started 
experimenting with some in an open raised bed. Now 'Cythe' and 'Thor', 
two of my favorites, are flowering well in the open bed after an 
unusually warm but typically wet winter. The persistent leaves get 
rather ragged in winter but new growth is vigorous and healthy. 'Thor' 
is especially good for a raised bed because it's shorter than other onco 
hybrids I've seen. Some other hybrids produce very tall stems that can 
flop over (e.g. 'Theseus'). 'Cythe' is medium tall but very stout. If 
you have a very well drained spot, dry in summer, I recommend trying 
some of these beautiful plants.

I have some onco species coming along from seed (thanks to Oron Peri and 
Kurt Vickery!) and may eventually see if they can survive on a large 
rock garden or this raised bed, which I built mainly to accommodate 
Tulipa species (also very happy there so far).

Jane McGary

Portland, Oregon, USA

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