number : 6 tot 9 per m2
- little groups of 3 to 10 plants (B) - groups of 10 to 20 plants, even more (C)
Plant description
Iris sibirica and its cultivars are suitable for fresh to damp sites, but do not like to sit in water.
So put these plants at the top of the bank edge where it never gets really soggy, or choose a spot in the border if you have a well-moisture soil.