· instead of filling your windowsills with pots all winter long, you dig the plants up before frost, shake the soil from the roots, prune them back, and slip them into plain paper bags. · successful overwintering allows you to enjoy mature, robust plants the following spring, offering a significant head start on the gardening year. Ahead, three ways to make the most of these pretty plants well beyond summer. Find out when and how to prepare, store, and revive your geraniums for next years blooms. · to overwinter geraniums, plan to protect them before the first hard freeze and when nighttime temperatures drop below 45°f (7°c). · but geraniums are technically perennial plants that can grow for years and rebloom again in spring if they’re protected from cold winter weather. · learn how to overwinter geraniums in pots, as bare root plants, or as cuttings. Here, we spoke to gardening experts about how to overwinter your favorite geraniums so theyll thrive for many seasons to come. They overwinter indoors, store as bare root specimens, and are propagated as cuttings. If you’d like to try your hand at overwintering geraniums , here are four techniques that actually work, and simple steps to help your plants rebloom next year! Stored in a cool, dark place like a basement or garage, they rest in dormancy until spring. There are a few ways to overwinter geraniums so you can enjoy them next year. · yes, its confusing, but the good news is that it turns out you don’t have to toss them at the end of the season. · the good news is that you can overwinter these plants, keeping them safe from the frost and replanting them in the garden when warmer temps finally return. Preparing geraniums for winter storage the process of preparing your geraniums must begin well before the first hard frost arrives, typically when night temperatures consistently fall below 40°f.