What is the latest date one can plant tubers in Zone 3 for flowers this summer? My tubers are just showing and some have a few leaves. Will they bloom this summer? I potted them up and put outside and finally realized I needed to bring them in the house to warm the "poor dears" up which is why I am so late. At least they seem to have survived my mean treatment.;-] Is their any point in putting them in hanging baskets?