I have three clumps of Stella. They are too big and need to be divided badly. They barely bloom, only a few scapes toward the outside edge of the clumps and they do not rebloom at all anymore.
If a clump is too big and is not blooming well anymore and one does not have enough planting space one can always divide it and only plant one of the portions back into the same location (after amending the soil, fertilizing, etc.) and compost the other portions.
