crowrita1 said:http://irises.org/About_Irises/Cultural%20Information/Grow_Bearded.html you may find some useful info here.
Misawa77 said:The idea of keeping the rhizomes apart by at least 12 inches is because of their growth. If you plant closer, you will need to dig them up sooner since they will begin to blend in with their neighbor. The tri-angle senerio is for creating a "mini-clump" with one variety. I don't believe they are trying to indicate you do the 8 inch triangle thing with different cultivars.
Muddymitts said:Patrick -- you're going to need more land.
irisarian said:Make sure they are facing the same direction or they will walk away from each other.
irisarian said:The triangle is placement of space. They should not be pointing a different way. I can't draw or I would show you what I mean.