🌱 Geranium

Grow in fertile, well-drained soil kept evenly moist in active growth. Improve heavy clay with grit and organic matter; on sandy soils add compost to retain moisture. Avoid prolonged winter waterlogging, which increases crown/root rot risk.

Seed is commonly sown either in early spring under cover or outdoors in early autumn. For spring sowing, surface-sow or cover lightly (about 2–3 mm) in a free-draining seed compost; keep evenly moist at ~15–20°C. Many Geranium seeds germinate more reliably after a cold period: sow outdoors in autumn for natural stratification, or cold-stratify moist-sown trays at ~1–5°C for 4–6 weeks before moving to warmth. Prick out seedlings when large enough to handle and grow on; transplant to final positions after risk of hard frost, spacing plants to allow air flow and spread.

Feed lightly: incorporate compost annually or apply a balanced, slow-release fertilizer in spring. Avoid high-nitrogen feeding, which can drive soft leafy growth at the expense of flowering; reduce/stop feeding after midsummer.

Mulch in spring with 2–5 cm of organic matter to conserve moisture and suppress weeds, keeping mulch off the crown to prevent rot. In cold/wet winters, use a light mulch and prioritize drainage rather than heavy, wet coverings.

Most hardy Geranium (cranesbill) species/cultivars form self-supporting mounds and usually do not require staking. In very rich soil or shade, long-flowering forms can flop; if needed, use discreet twiggy supports or a low ring support early in spring.

Leaves from scented “geraniums” (Pelargonium spp.) are commonly infused to perfume teas, syrups, and desserts; use a small amount because the aroma is strong and remove leaves after steeping. True Geranium herbal species have also been used as astringent teas (notably roots or aerial parts depending on species), but these can be quite tannic; avoid excessive use and seek professional advice for pregnancy, breastfeeding, children, or if using anticoagulants or managing chronic GI disease.

Deadhead to prolong flowering; shear or cut back by about one-third after the main flush to encourage fresh growth and possible rebloom. In late summer/autumn, cut back spent stems to basal growth; remove dead foliage in late winter/early spring.