Wintering Lantana in New England
I moved to New Hampshire 4 years ago after living in Arizona my entire life. While in Arizona I fell head over heels in love with growing Lantana everywhere in my yard because it attracts butterflies so well (and it's a beautiful flower too!). In Arizona it grows as a perennial because it so rarely frosts, but here new New England I am crushed to find it seems impossible to keep it alive over the winter. Unfortunately my window space inside isn't large enough to accommodate the number of plants I want to keep over the winter and the local lawn and garden centers rarely carry it until pretty late in the summer (and who can afford to buy this many plants year after year?). Any ideas how I can prevent the frost from killing it outside? Or should I write it off and find something else the butterflies love that is a little more suited to the climate here?