Many bedding “geraniums,” which are Pelargonium plants, grow well in sun. Hardy geraniums in the genus Geranium vary: some prefer sunny borders, while others suit partial shade. Identify the plant and cultivar before choosing its position.
First check which geranium you have
Common bedding pelargoniums often have fleshy stems and rounded clusters of flowers. Hardy geraniums, also called cranesbills, are a different group. A label or nursery identification is more reliable than flower color.
Pelargoniums are often grown as annual bedding in cold climates because they are frost-tender, not because every plant naturally lives for only one year. That distinction matters if you plan to bring a container indoors.
Sun for bedding pelargoniums
Start with a sunny, well-drained location suited to the cultivar. In strong heat or under glass, protection from scorching midday sun may help. Ivy-leaved and other pelargonium groups should be checked individually rather than assigned one universal shade rule.
The RHS pelargonium guide recommends good light, frost protection and careful watering. Introduce a plant raised indoors to outdoor exposure gradually; a sudden change can damage leaves even when the final site is suitable.
Hardy geraniums for sun or shade
Choose by species and cultivar. The RHS hardy-geranium guide lists options for sunny borders and shaded spots. For example, its shade choices include Geranium phaeum and G. macrorrhizum.
Shade tolerance does not make every geranium suitable for a dark, dry area under dense tree roots. Consider moisture, soil and root competition along with the hours of sun.
Assess the site before moving the plant
- Observe direct sunlight through the day and note hot reflected light from paving or walls.
- Check whether surrounding plants have grown over the geranium.
- Check the root zone for dryness or persistent wetness.
- Review recent changes, such as moving a pot outdoors or repotting.
Few flowers or yellow leaves do not identify one cause. Improve a clearly unsuitable condition, then observe the response rather than changing light, water and fertilizer all at once.
Container care that supports the light choice
Use a container with drainage and a growing mix intended for pots. Choose its size for the plant’s roots and mature growth; one pot diameter does not suit every geranium. Empty standing water from saucers.
Check moisture before watering. A sunny pot may dry faster than one in shade, but keeping it constantly wet is not a substitute for matching exposure. Follow a suitable fertilizer’s instructions and account for any feed already included in the potting mix.
Keep the plant name and note how it flowers in the chosen position. If you need to replace it, that record helps you choose another cultivar for the same conditions instead of relying on a blanket full-sun rule.
