...

Geranium pratense ‘Plenum Violaceum’

In Stock • Dispatched from our nursery

Free delivery over £59.99

Smaller sizes establish quickly • Larger sizes give a instant impact

Seasonal availability helps us send plants at their best

Exceptional plants, better value

Mix & match • Create your own combination • Pot sizes subject to availability

P9(9cm Pot)

1 Litre(13cm Pot)

3+ plants

£28.00

£33.00

Save 5%

6+ plants

Most Popular!

£55.00

£65.00

Save 10%

9+ plants

£80.00

£95.00

Save 15%

*Only includes new for 2026 varieties • to see a full list of included plants click here*

Exceptional plants, better value

Mix & match • Create your own combination

P9 (9cm)

1 Litre

3+ plants

£28.00

£33.00

Save 5%

6+ plants

Most popular!

£55.00

£65.00

Save 10%

9+ plants 

£80.00

£95.00

Save 15%

*Only includes new for 2026 varieties • to see a full list of included plants click here*

More must-have additions for your garden

Plant information

Plant Description

Geranium pratense ‘Plenum Violaceum’ is a stunning hardy perennial, valued for its rich violet-blue, fully double flowers that bloom from late spring into summer. Its finely divided green foliage forms a tidy mound, providing an attractive backdrop for the abundant flowers and a natural, relaxed structure in borders or mixed perennial beds. Highly resilient and low-maintenance, it thrives in full sun to partial shade with well-drained soil, making it perfect for cottage gardens, wildlife-friendly plantings, or naturalistic schemes. A long-flowering and reliable perennial that adds colour, texture, and charm to the garden.

More Great Choices

🌿 How to Care for Geranium pratense ‘Plenum Violaceum’

How do I prune Geranium pratense ‘Plenum Violaceum’?
Geranium pratense ‘Plenum Violaceum’ should be left through the winter, as the dead wood protects them from frost. They can be pruned in early spring, and more vigorous varieties may be trimmed again around June.
Geranium pratense ‘Plenum Violaceum’ can be susceptible to aphids, capsid bugs, whitefly, sage leafhoppers, and glasshouse red spider mites. Additionally, fungal issues like grey mould (Botrytis) can develop in cool and damp conditions, especially during overwintering.
Water Geranium pratense ‘Plenum Violaceum’ regularly during dry spells, particularly newly planted ones. Established hardy salvias are drought-tolerant but benefit from deep watering during prolonged hot periods. Avoid waterlogging, as it can cause root rot.
Geranium pratense ‘Plenum Violaceum’ require light feeding in spring with a balanced slow-release fertiliser or compost. Tender salvias benefit from fertilisation every 2–4 weeks during the growing season using a liquid feed for flowering plants. Over-fertilising should be avoided, as it can encourage foliage growth at the expense of flowers.
Propagation of Geranium pratense ‘Plenum Violaceum’is prohibited without a licence
Geranium pratense ‘Plenum Violaceum’ should be trimmed around April or May, a technique often called the “Chelsea Chop,” once new shoots start to appear. Cut back to the fresh growth, and continue deadheading throughout the season. Vigorous varieties can be pruned again in July to encourage bushier, greener plants rather than tall, woody stems. Salvias should not be cut back in autumn, as leaving the foliage intact helps protect the plant from frost.
Geranium pratense ‘Plenum Violaceum’ moderately drought-tolerant once established, thriving in well-drained soil and full sun. Tender salvias are less drought-tolerant and require more consistent watering.
Geranium pratense ‘Plenum Violaceum’ performs well in UK gardens if given full sun and free-draining soil. It’s hardy in most areas, flowers for months in summer and autumn, and suits borders or containers. Avoid winter wet and prune lightly in spring.

Join the Middleton Nurseries Gardening Club

Stay in the loop with exclusive promotions, news, and updates. Sign up now and enjoy 10% off your next order