I have some german bearded irises growing around my mailbox.
There's a section of about 2'x2' surrounded by railroad ties. In there is the post to the mailbox, and the rhizomes from the irises. The dirt is completely filled in with iris rhizomes (they've been growing there something like 8 years).
I used to get many stalks of iris blooms, but, in the past two years I've only gotten one "stem" of blooms per season. I think it might be that they're too crowded.
Is there anything special I should do to separate them? Just dig out "all" of them except one or two rhizomes? Should I leave a clump and then free a section of a certain size, so, I effectively 'patchwork' in blank areas?
What I'd like to do is remove the least amount of rhizomes for the most amount of blooming return next year. If that's all of them, then, that's fine, but, I don't want to pull out all of them unless that's really the best choice.
Second to that, I have a new lot of mixed (by color) iris rhizomes that I bought. How far apart should I plant them in a long thin bed that will still leave room for other small flowers in between (I have some snowdrops and grecian windflowers, and other 'small' bulbs that grow into small plants)?
Gwen