Dwarf Sag will send out runners jus as narrow leaf swords do. Try some Osmocote+ capsules in thier root radius. They will perk up real quick after adapting to your water. Also, you may want to try Blyxa Japonica for the grassy look, but it is taller.
Ok, I'll give them a few extra root tabs
I had blyxa once in the past and it was really nice! But, without CO2 I'm not sure it will do well in my tank. Plus, I want something really nice and tall(and grassy) for my background!! I really want to get this sag going!