Iberian geranium
Geranium ibericum · Geraniaceae
📷 Dinkum · CC BY-SA 3.0
The gardener's calendar
Ideal time to plant iberian geranium: set it out when the soil is neither frozen nor waterlogged, and water generously as it establishes.
ID card
- Family
- Geraniaceae
- Form
- Herbaceous perennial
- Mature height
- 60 cm
- Flowering
- May to July
- Foliage
- Deciduous
- Hardiness
- Very hardy (-15°C)
- Origin
- Caucasus and Southwest Asia
- Growth
- Moderate
✓ Taxonomy verifiedSource: AI estimate · hardiness: reliability high.
Expert tips
The key tip
Geranium ibericum spreads generously: average soil, partial sun exposure is ideal. Long flowering May/June/July if you regularly deadhead the spent flowers.
The common mistake
Overloading it with fertilizer: it becomes soft, large leaves but weak flowering, and sprawls limply instead of forming a nice mound.
The pro's trick
Cut the stems back to mid-height in late June after the first flush: the plant regrows, produces new shoots and reflowers more abundantly in July/August.
Seasonal watch
Damp September/October: watch for powdery mildew on the heart leaves—aerate the center with light pruning and water at soil level.
Care
Light Requirements
Plant your Iberian geranium in partial shade or light sun for optimal flowering. It tolerates partial shade well and can even thrive beneath deciduous trees. Avoid spots that are too hot and dry in Mediterranean climates.
Watering
Water regularly during the growing season (spring-summer) to keep the soil moist but not waterlogged. Reduce watering in autumn and winter when the plant slows its growth. Once established, this perennial tolerates moderate dry periods well.
Soil
Choose well-draining soil rich in organic matter. Iberian geranium adapts to various soil types provided they're not constantly wet. Improve poor soil with compost when planting.
Fertilizing
A moderate application of balanced fertilizer in spring is enough to boost flowering. Avoid excess nitrogen which would favor foliage over flowers. An application of compost at the start of the season can replace chemical fertilizer.
Pruning and Maintenance
Cut back the clump in late winter or early spring to encourage a compact shape and generous flowering. Remove spent flowers to extend blooming. A simple cleanup of dry stems is usually sufficient.
Diseases and Pests
Iberian geranium is robust and rarely affected by common diseases. Watch for powdery mildew in case of excessive humidity and stagnant air. Good drainage and aeration are enough to prevent fungal problems.
Did you know?
The Iberian geranium owes its name to its region of origin in the southern Caucasus. Unlike pelargoniums often called 'geraniums' in horticulture, the true geranium is a robust perennial that returns each year without intervention, gradually forming spectacular colonies of blue-violet flowers in early summer.
Where to buy it
Plant in spring or early autumn, avoiding spells of intense heat. Pick a plant with healthy foliage and roots that are not exposed. Best time: March, April, May, September.
Add this plant to my garden →Plants from the same family
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- French crane's-billGeranium endressii
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- Himalayan crane's-billGeranium himalayense
Tips generated and checked by Viridia — adapt them to your local climate.