Grow and Care for a Geranium

The plant sold as a patio geranium is Pelargonium. It wants full sun, draining mix, and regular deadheading. Frost kills it. It is not hardy Geranium (cranesbill), the border perennial. Americana Red and Cascade White share that contract; they do not share one habit. Sort class on Types of Geraniums. Pots on Geraniums in Containers. Winter on Overwintering Geraniums. Cranesbill lives on How to Grow Hardy Geraniums.

Tender Pelargonium, not hardy geranium

Pelargonium is the tender bedding and patio plant. Most temperate gardens treat it as an annual, or they store it frost-free and bring it back in spring (Clemson / Almanac). Hardy Geranium — cranesbill — is a different genus. It returns outdoors. Do not paste hardy watering, dividing, or winter mulch onto a tender pot. The shared common name is the usual mix-up at checkout, not proof the plants share a winter.

If the tag says Geranium and the plant is a low mound for a border, open How to Grow Hardy Geraniums. If you bought a summer patio pot, stay here. Class and habit live on Types of Geraniums. Frost does not mean you failed the plant; it means the plant is tender. A zonal that dies in a freeze is behaving as Pelargonium. A cranesbill that sits through winter is a different buy.

Pets can be upset if they chew the leaves. Keep cats and dogs from eating them. That is a chewing risk, not a drainage cue, and it does not change sun or water.

Full sun, drain, and plant after frost

Clemson: at least four hours of direct sun; in very hot spells, light afternoon shade can protect leaves. Almanac: wait until nights stay above about 55°F before plants go out, and bring pots in when nights dip under that again. RHS: most flower best in full sun; some regals prefer a little shade in heat. Air around the plant matters. Packed foliage that never dries invites disease. A bright north wall that never gets a hot afternoon still reads as shade for bloom.

In the ground, use soil that drains. Raised beds help in heavy clay. In a pot, use potting mix, not garden soil. Plant at the same depth as the nursery pot. Full pot setup lives on Geraniums in Containers. Do not plant into a freeze window because the garden center already has color on the bench. Wait until nights stay mild.

1. Wait until frost risk has passed and the soil has warmed (Clemson).
2. Pick a site with direct sun and air. Count hours on the real patio, not the catalog photo.
3. Set the plant at nursery depth. Firm. Water once so the root ball meets the mix.
4. Leave space between plants so leaves dry after rain.

Water, feed, and deadhead

Water the mix, not the leaves, in the morning. Let the top inch dry, then soak until water runs (Almanac / Clemson). Wet mix kills more patio geraniums than a short dry spell. Never let the plant wilt hard — yellow drop follows — but do not keep the crown in a puddle. Pots on hot paving dry faster than a bed; check them more often. Keep water off the foliage. Wet leaves favor disease. A short dry spell is safer than a week in a wet saucer. If you are unsure, poke the top inch before you water again.

Feed during active growth. Clemson: every four to six weeks in the season. A dilute liquid feed every two weeks in peak summer is a working rhythm. Heavy nitrogen makes leaf at the expense of bloom. Stop feeding when you move plants into winter storage. Do not feed a plant that is sitting wet and yellow — drain first, then feed.

Pots and baskets are the usual home for this catalog. Full mix, hole, and saucer steps live on Geraniums in Containers. Ivy still wants a rim to trail; zonals still want an upright pot they can fill.

• Deadhead by snapping or cutting the spent stem back to a leaf joint so energy goes to new buds (Clemson).
• Pinch young tips in spring so zonals branch instead of stretching (RHS / Almanac).
• If a plant goes leggy in midsummer, shorten stems by about a third. That is a tidy cut, not a separate prune URL.

Yellow leaves, wet foliage, and frost

Yellow lower leaves usually mean irregular water, a waterlogged mix, or hunger. Fix drain first. Sparse bloom usually means too little sun, or a pot that stayed cool and wet after a cold snap. Move it into light. Edema — corky spots on leaves — shows up when pots stay too wet (Clemson). Reduce water, keep leaves dry, and give air.

Frost kills top growth. You can store plants frost-free, take cuttings, or buy fresh stock in spring. Those paths live on Overwintering Geraniums. Do not invent a hardy-geranium mulch program for a tender pot. A plant that spent summer in a basket still needs to come in before frost if you want it next year.

Bacterial leaf spot and similar wet-weather marks show up when leaves stay wet and air is still (Clemson). Water the mix in the morning. Give space. Drop badly marked leaves. A spray will not replace sun and drain.

• Empty saucers after rain. Standing water at the base is rot.
• Do not treat citronella scent as a proven mosquito screen. It is a leaf perfume. Class still lives on Types of Geraniums.
• Replace in spring if storage is not worth the space. Fresh spring stock is a valid path, not a last resort after a freeze.