Eupatorium coelestinum is a perennial plant with fluffy blue flower heads.
It's illegal to buy, sell or plant purple loosestrife, and It's banned in nurseries and farmer's markets.
Deer will eat any plant if they are hungry enough. However, like us, they find some foods more appetizing than others.
There are about 40 Eupatarium species of native North American wildflowers available and they like room to romp and form large clumps.