Don’t Toss Your Geraniums! Keep Them Growing Through Winter

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That tired-looking porch geranium may have another summer in it. Bring healthy plants indoors before frost, give them strong light, and adjust their watering, and you can keep them growing through winter. The trick is matching their care to shorter days instead of treating the windowsill like a July patio. A few sensible cuts and a better winter spot can save a favorite plant—and spare you another trip to replace it next spring.

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Bring Them In Before Frost—and Give Them a Cleanup

White and pink pelargonium flowers with vivid red centers above rounded green leaves.

The colorful bedding geraniums sold for summer pots are usually Pelargonium, tender perennials commonly grown as annuals. Hardy cranesbill geraniums belong to a different genus and need different winter care. This routine is for those tender patio plants, especially common zonal geraniums.

Move them inside before the first fall frost. Use your local forecast as the deadline; waiting for blackened foliage makes saving a plant much harder. Choose firm, healthy specimens rather than trying to carry a badly rotting plant through winter.

Before moving a pot, check beneath leaves, along stems, and around the rim for insects, webbing, or sticky residue. Rinse off dust and visible soft-bodied pests, then keep incoming plants apart from your houseplant collection for a week or two while you watch them.

Red pelargonium blossom above green foliage in a container.

Remove dead leaves, spent flower stalks, and debris on the soil. If the plant is oversized, shorten healthy stems by roughly one-third to one-half with clean, sharp pruners. Make cuts just above a leaf joint, leaving a useful framework of healthy stems.

A plant that already fits its pot can stay there. For one lifted from a bed, carefully preserve the root ball and pot it in fresh commercial potting mix in a container with drainage holes. Water after potting and let the excess drain.

There is no prize for saving every pot on the porch. We recommend starting with your healthiest favorites and giving each enough space to inspect and care for it.

Give Them a Bright Window and a Cooler Room

Two pots of pink and white flowering pelargoniums on an indoor windowsill.

Light is the make-or-break part of growing geraniums indoors. A sunny south-facing window is a useful starting point in many U.S. homes. A dim shelf across the room is unlikely to support sturdy growth.

If the window is shaded or winter days are especially gloomy, add a grow light. Follow its recommended distance from foliage; different lamps deliver very different amounts of light. A lamp that merely makes the room look brighter may still leave the plant stretching.

Two pelargoniums in terracotta pots and saucers on a sunny indoor windowsill.

Aim for daytime temperatures around 65–70°F, with slightly cooler nights. Keep foliage away from freezing window glass, cold drafts, and blasts from heating vents. Bright and comfortably cool is a better combination than hot and poorly lit.

Long gaps between leaves and thin, reaching stems suggest the plant needs better light. Improve its position, then pinch soft shoot tips above a leaf joint to encourage branching. Repeated haircuts cannot make up for a dark room.

Some plants will flower indoors; others will slow down considerably. A healthy geranium with few winter blooms can still be a success. Remove flowers as they fade and focus on keeping the stems firm and the new growth reasonably compact.

Cool, dark storage is a separate way to overwinter dormant plants. For a leafy geranium you want to keep growing, stick with a bright position and care based on what the plant is doing.

Let the Soil Tell You When to Water

Pink and white flowering pelargoniums growing together in a rectangular balcony planter.

The quickest way to turn a rescued geranium into a problem is to keep using its summer watering schedule. Shorter days and slower growth often mean the pot stays damp much longer, although a warm, dry house can still dry it out.

Feel the potting mix before reaching for the watering can. Let the surface dry between waterings. If the mix still feels moist and cool, wait and check again. Avoid leaving the entire root ball bone-dry until the plant repeatedly wilts.

When water is needed, moisten the mix thoroughly and allow it to drain. Empty the saucer or decorative outer pot afterward. A drainage hole cannot protect roots if the nursery pot sits in a puddle.

Red pelargonium flower buds beginning to open above a container plant.

A few yellowing leaves after the move can reflect the change in conditions. Remove them and reassess light, moisture, and pests. Wilting while the soil is wet is a reason to inspect the roots and drainage, not an automatic signal to add water. Soft, dark stems or roots warrant prompt attention.

Feed according to growth. If the plant is resting with little new growth, hold off on fertilizer. If it is actively producing leaves or buds in good light, feed lightly with a suitable houseplant fertilizer at the label’s indoor rate. Extra fertilizer will not brighten a dark window.

Make a quick pest check part of each watering visit. Inspect leaf undersides and new tips, and remove fallen plant material. Catching a few insects early is much easier than dealing with an infestation after several pots are affected.

Save a Few Cuttings and Plan Their Spring Return

A small pelargonium cutting growing in a pink square pot beside other cuttings.

If an old plant is too large or woody to keep comfortably, cuttings let you save a smaller version. Take them while the parent is healthy and still growing, before frost damages the shoots.

Cut 3- to 4-inch pieces from healthy shoot tips. Remove the lower leaves and any flowers or buds. Insert the bare lower stems into a clean pot of lightly moistened rooting medium, such as perlite mixed with a seed-starting mix. Keep leaves above the surface.

Rooting hormone can help; use it as directed. Set the cuttings in bright light away from harsh direct sun, and keep the medium lightly moist. They have not developed the roots that allow an established geranium to tolerate longer dry spells.

Young pelargonium growth in a red square pot alongside other potted cuttings.

Rooting commonly takes several weeks—roughly four to eight weeks, depending on conditions. Once a cutting has a developed root system, move it into its own small pot and give it the bright winter position used for established plants.

As spring growth strengthens, pinch or prune lanky stems, resume light feeding, and watch for pots drying faster. The calendar alone should not trigger heavier watering; check the mix as growth picks up.

Wait until frost danger has passed before leaving plants outdoors. Acclimate them over about two weeks, beginning with short stays in a sheltered, lightly shaded spot and gradually increasing outdoor time and sunlight. Bring them back in if cold weather returns.

Label saved plants with their flower color before the last blooms disappear. When it is time to refill the porch pots, you will know exactly which favorite made it through the winter.

References

Image Attributions

Bring Them In Before Frost—and Give Them a Cleanup

Give Them a Bright Window and a Cooler Room

Let the Soil Tell You When to Water

Save a Few Cuttings and Plan Their Spring Return

Featured graphic: Gardening Wins artwork supplied by the publisher.