Geranium Raven

Geranium ‘Raven’, also known as Geranium phaeum ‘Raven’, is a striking perennial known for its deep purple to near-black nodding flowers and softly textured green foliage. Flowering in late spring and early summer, it is ideal for adding deep colour to your outside space.

Providing seasonal care is essential to ensure healthy growth, reliable flowering, and long-term performance. Below is a complete seasonal care guide for Geranium ‘Raven’ throughout the year.

Spring

Pruning and Maintenance

In early spring, remove any dead or damaged foliage from the previous season using clean, sharp secateurs. This encourages fresh new growth and keeps the plant tidy as the growing season begins.

Feed

Apply a balanced, slow-release fertiliser formulated for flowering perennials in spring as new growth appears. This supports healthy development and encourages strong flowering.

Dividing (if necessary)

Every 3–4 years, Geranium phaeum ‘Raven’ can be divided in spring if clumps become overcrowded or flowering declines. Lift the plant carefully, divide into sections, and replant into well-drained, moisture-retentive soil.

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Begin regular watering as temperatures rise, keeping the soil evenly moist during establishment.

Summer

Pruning and Maintenance

After the main flush of flowering, shear back spent flower stems and any tired foliage to encourage fresh growth and maintain a neat appearance. This may also promote light repeat flowering.

Mulching

Apply a 2 to 3-inch layer of organic mulch around the base of the plant to retain moisture, suppress weeds, and regulate soil temperature during warm weather.

Watering

Geranium ‘Raven’ is moderately drought-tolerant once established but benefits from watering during prolonged dry spells. Allow the soil to dry slightly between waterings.

Autumn

Pruning and Maintenance

As growth slows, remove any damaged or yellowing foliage to tidy the plant. Avoid heavy pruning, as remaining foliage helps protect the crown over winter.

Protection from frost

Refresh the mulch around the base of the plant to provide added insulation as temperatures begin to fall.

Winter

Pruning and Maintenance

Minimal pruning is required during winter. Remove any remaining dead foliage to keep the area tidy, taking care not to damage the crown.

Protection from frost

Geranium phaeum ‘Raven’ is fully hardy and generally requires little winter protection. A light mulch helps protect the crown from extreme cold and winter wet.

Pest and disease prevention

Pests and diseases are minimal in winter, but inspect occasionally for signs of rot caused by poor drainage and remove any affected growth promptly.

Plant SOS

Wilting foliage – A sign of dry soil during warm weather. Increase watering during dry spells.

Few or no flowers – A sign of too much shade or overcrowding. Improve light levels and divide clumps if needed.

Yellowing leaves – A sign of poor drainage or overwatering. Improve drainage and reduce watering.

Untidy growth – A sign the plant needs cutting back after flowering. Shear lightly to refresh foliage.

Poor vigour – A sign of compacted soil or nutrient deficiency. Improve soil structure and apply feed in spring.

Holes in leaves – A sign of slug and snail damage. Use Slug and Snail repellent or Slug and Snail control.