| What perennial ornamental grasses thrive in zone 4a-4b? |
| Here is a list: Andropogon (Giant Bluestem or Big Bluestem), Butomus (Flowering Rush), Deschampsia caespitosa (Tufted Hair Grass), Festuca amethystina, Festuca ovina var. glauca (Blue Sheep's Fescue), Helictotrichon (Blue Oats Grass), Phalaris arundinacea var. picta (Gardener's Garters, Reedy Grass), Schizachyrium scoparium (Little Bluestem). |
