How to Overwinter Geraniums: 4 Methods

Zonal geraniums (*Pelargonium* × *hortorum*) are sold as annuals in most of the United States, but they're actually tender perennials that can survive many winters if stored correctly. A well-established geranium plant that you've grown for two or three seasons and selected for flower color and.

Zonal geraniums (Pelargonium × hortorum) are sold as annuals in most of the United States, but they're actually tender perennials that can survive many winters if stored correctly. A well-established geranium plant that you've grown for two or three seasons and selected for flower color and habit is worth saving. Replacement plants at a nursery cost $6—12 each; saving them costs nothing but shelf space and a little time.

Per Penn State Extension, there are four practical methods for overwintering zonal geraniums in zones 5—7. Each has a different success rate, different space requirement, and different demand on attention through winter.

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What You're Working With

The geraniums most commonly overwintered are Pelargonium × hortorum (zonal geraniums) and Pelargonium peltatum (ivy geraniums). Both are native to South Africa and frost-tender. Per Clemson HGIC, they are killed by any frost, so outdoor plants in zones 5—7 must be brought in or protected before temperatures drop to 32°F.

Scented-leaf geraniums (Pelargonium graveolens and relatives) and regal pelargoniums overwinter similarly but may require more light to maintain attractiveness indoors.

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