Gardening

They grow from bulbs, but they are not cold hardy.

Back when I had them I had to lift them in the fall, and store them in the basement over the winter.

They may sprout again, if so just let them, they'll use the sunlight to build strength in the bulbs even if they don't bloom.

At or about the first light frost, any sprouts will wither, and you can dig up the bulbs and store them in a paper or mesh sack in a cool dark place. You want to lift them before the ground freezes hard.

As soon as danger of frost is past, plant them with a little bulb food mixed into the soil. They will likely re-sprout, they might or might not bloom the first year but if you let them grow all summer and repeat this, they will DEFINITELY bloom the next year.

helpfully,
Bright