First identify your geranium. Tender bedding geraniums are usually Pelargonium; hardy border geraniums belong to Geranium. Their after-flowering care differs. Pelargoniums often keep flowering when spent clusters are removed, while some hardy geraniums benefit from a cutback after their main flush. Do not apply one pruning and winter-care routine to both.
Check the plant label before cutting
Pelargoniums commonly grow in summer pots, window boxes and bedding displays. They often have thick stems and rounded or ivy-shaped leaves. Hardy geraniums commonly form clumps in borders, with lobed leaves and open, five-petaled flowers. These clues help, but a label or a reliable identification is better than guessing.
The distinction matters most when winter approaches. A tender pelargonium may need a frost-free place; a suitable hardy geranium can remain in the garden. Losing flowers does not by itself tell you which plant you have or whether it is dying.
For pelargoniums, remove spent flower clusters
Follow the faded cluster’s stalk down to where it joins the plant, and remove that stalk carefully without damaging nearby buds. Take away yellow or dead leaves and fallen petals from the pot surface. If part of a cluster is still attractive, you can wait until it has finished.
Do not remove a third of every plant each time flowers fade. Light tidying and major pruning are different jobs. A hard cutback can remove developing flowers, so plan it around the plant’s condition and overwintering method.
The RHS pelargonium guide covers seasonal pruning and frost-free overwintering. Use its relevant method rather than cutting by an arbitrary percentage after every flush.
Keep care steady while new buds develop
Check potting-mix moisture before watering, then let excess water drain. A container in warm wind may dry much faster than one indoors. A once-a-week rule can therefore be too much or too little. Check the plant and pot rather than using yellow leaves alone to diagnose thirst.
Give the variety suitable light and follow feeding directions for its container mix and season. Extra fertilizer does not make up for poor light or damaged roots. Organic fertilizer can also be overapplied; its origin does not make every dose harmless.
Repot only when the root system and growing medium justify it. Faded flowers alone are not a reason. Look for persistent crowding, watering difficulty and the condition of the root ball before choosing a larger pot with drainage.
For hardy geraniums, match the cutback to the variety
Some summer-flowering border geraniums become untidy after their main display. Cutting those back can produce fresh foliage and sometimes more flowers. Other varieties flower for a long period or retain useful foliage, so wait rather than stripping a plant that is still performing well.
The RHS hardy-geranium guide gives different care from its pelargonium guide. Keep new growth and nearby plants in view when cutting. Water a dry root zone after care if needed, but do not leave the soil saturated.
A second flowering flush is possible for some plants, not guaranteed for every cultivar. If the season is ending, natural dieback may be the expected next stage.
Plan winter care before frost
For a pelargonium you want to keep, choose an appropriate indoor or frost-free overwintering method before cold weather arrives. Inspect it for pests before bringing it into a collection of houseplants. Reduce watering to suit slower growth, while checking the plant rather than abandoning it for months.
For a hardy geranium, follow the cultivar’s local hardiness and foliage behavior. Do not dig it up merely because a guide to bedding geraniums says all geraniums must come indoors.
If a plant declines suddenly, inspect stems, roots, light and moisture. Flowering ending, ordinary seasonal leaf loss and rot are different situations. Identify the problem before making repeated cuts, adding feed or changing the watering every day.
