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The short answer: care for geraniums (Pelargoniums) by giving them full sun, deep but infrequent watering, light regular feeding, and consistent deadheading. Let the soil dry out between waterings, since geraniums rot in constantly wet soil, and remove entire spent flower stalks to keep them blooming. Feed container plants every 2 to 4 weeks, pinch and cut back to prevent legginess, and in most of the US bring them indoors or take cuttings before frost, because they are tender and will not survive a cold winter outside. Get watering and deadheading right and they bloom from spring to frost.
Geraniums are a classic American porch and container flower, valued for their bold blooms, drought tolerance, and long season. This guide covers light, watering, feeding, pruning, and the three ways to overwinter them, built from horticultural consensus and extension guidance rather than first-hand trials, as explained in how we rank.
Know your geranium
The name covers several different plants; matching care starts with knowing which you have.
| Type | Traits | Best use |
|---|---|---|
| Zonal (Pelargonium x hortorum) | Upright, rounded flower clusters, marked leaves | Beds, containers, the classic bedding geranium |
| Ivy (Pelargonium peltatum) | Trailing, glossy ivy-shaped leaves | Hanging baskets, window boxes |
| Regal / Martha Washington | Large ruffled blooms, prefers cooler temps | Spring containers, cooler climates |
| Scented | Fragrant foliage, small flowers | Herb gardens, containers, fragrance |
| Hardy geranium (cranesbill) | True perennial, small flowers, zones 3 to 8 | Perennial borders; a different plant |
Most people mean the zonal Pelargonium, the upright bedding geranium. Note it is unrelated to the hardy cranesbill geranium despite sharing the common name.
Light and temperature
Geraniums are sun lovers. Give them at least 6 hours of direct sunlight for the best bloom, though in very hot southern regions some afternoon shade prevents stress and fading. Too little light is the most common reason a geranium grows tall and leggy with sparse flowers. They prefer moderate temperatures and bloom best when days are warm and nights are cool; regal (Martha Washington) types in particular slow their flowering in summer heat and do better in spring and fall. Indoors over winter, place them in the brightest window you have, ideally south-facing, to keep them compact.
Watering geraniums the right way
Geraniums are more drought-tolerant than most bedding plants, and overwatering is the number one killer. Their thick, somewhat succulent stems store water, so they prefer to dry out between drinks.
- Let the top inch or two of soil dry before watering again. Stick a finger in to check rather than watering on a fixed schedule.
- Water deeply, soaking until it drains from the bottom, then let it dry down. Deep-and-infrequent beats shallow-and-often.
- Water at the base, keeping foliage dry to reduce botrytis and leaf spot.
- Ensure drainage. Never let containers sit in a saucer of water; soggy roots cause the yellow leaves and rot geraniums are prone to.
Yellowing lower leaves almost always mean too much water, not too little.
Feeding geraniums for continuous bloom
Geraniums are moderate feeders, and container plants especially need regular nutrition to keep flowering since watering leaches nutrients away. Use a balanced or bloom-focused water-soluble fertilizer every 2 to 4 weeks through the growing season, or incorporate a slow-release fertilizer at planting. Avoid high-nitrogen feeds, which push leafy growth at the expense of flowers. In-ground geraniums in decent soil need less; a lighter feeding schedule suits them. Stop feeding in fall as growth slows, and feed overwintering plants only very sparingly, since they are resting. Watch for pale, yellowing growth as a sign a container plant is hungry.
Deadheading and pruning
Two habits keep geraniums full and blooming.
- Deadhead entire flower stalks. When a flower cluster fades, follow its stalk down to the base where it joins the plant and snap or cut it off there, rather than just pulling off the dead petals. Leaving stalks invites rot and looks messy.
- Pinch and prune for shape. Pinch the tips of young plants to encourage branching, and cut back leggy stems to a leaf node during the season. After overwintering, cut plants back by about half in spring before moving them outdoors.
Regular deadheading redirects the plant's energy into new blooms and extends the flowering season well into fall.
Three ways to overwinter geraniums
Because geraniums are tender and often expensive to replace, many gardeners carry favorites over winter. There are three proven methods.
| Method | How | Best for |
|---|---|---|
| Houseplant | Pot up, place in a bright window, water sparingly | Those with sunny indoor space |
| Cuttings | Root 4 in tip cuttings in late summer; grow small plants over winter | Multiplying plants, saving space |
| Dormant bare-root | Dig up, store bare-root in a cool (45 to 50°F) dark spot; mist roots if shriveled; replant in spring | Many plants, limited light |
The dormant storage method is the traditional approach and works surprisingly well: plants look dead all winter but leaf out again when replanted. Whichever you choose, act before the first hard frost, which will kill plants left outdoors.
Common geranium problems
Watch for botrytis (gray mold) on flowers and leaves in cool, wet, or crowded conditions; improve airflow and remove affected parts. Bacterial and fungal leaf spots appear as dark or ringed spots, worsened by overhead watering. Edema, corky bumps on the undersides of leaves, comes from the plant taking up water faster than it transpires, common in cool humid weather and fixed by reducing watering. Yellowing leaves usually mean overwatering. Leggy plants mean too little light. Geraniums are generally tough, so most problems trace back to too much water or too little sun.
Best soil and containers
Because geraniums are so prone to root rot, the growing medium matters as much as your watering habits. Use a light, well-draining potting mix rather than a dense, moisture-holding blend; adding perlite or coarse sand improves drainage further and suits their preference for drying out between waterings. Always plant in a container with generous drainage holes, and never leave a pot standing in a filled saucer. A slightly snug pot is fine; geraniums bloom well when their roots are a little confined, and an oversized pot holds too much wet soil around a small root ball. Terracotta pots are a good match because they breathe and let excess moisture evaporate, reducing the risk of soggy roots, though they do dry faster and need closer watering attention in summer. For in-ground plants, choose a raised or naturally well-drained spot and lighten heavy clay with compost and grit before planting. Get the drainage right and geraniums become one of the most trouble-free flowers you can grow.
Geraniums anchor a container beautifully alongside softer bloomers. Pair them with petunias for trailing color and marigolds for contrast. If you want to multiply your plants the same way you would a rose, the cutting principles in how to propagate roses carry over. Browse more at the flowers and ornamentals hub.