SIB cultivation


Please enlighten this rookie.
I was given a wonderful clump of the Siberian 'Blue Ego' from our local
Iris society.  I planted it in a moist spot and it took off, bloomed
like mad, and has increased to about 15 inches wide.  This was two years
ago.  Should I divide it this year?  It has plenty of room to spread,
but I don't want to embarass you good people by doing the wrong thing ;)
If division is called for, how deep should I replant, and how far apart?
And how many "children" should I clump together?
One last beginner question- Do sibs bloom in sequence like daffs? Is it
possible by carefully selecting cultivars to have them in bloom for over
a month?
Thanks for the help.

Best,
Julie Finn
Zone 7/Virginia



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