Nierembergia: Cup flower

Height 15-20cm (6-8in)

Planting distance 20cm (8in)

Flowers early summer to early autumn

Moist, but well-drained soil

Sunny sheltered site

Tender perennial grown as half-hardy annual

Though perennial, the species most commonly grown in Britain, Nierembergia caerulea, is tender and usually treated as an annual. Its fine green foliage forms neat hummocks which become covered with small pale lavender flowers with yellow throats from early summer to early autumn. ‘Mont Blanc’ is smothered with glistening white flowers; ‘Purple Robe’ has deep violet flowers. Cup flower looks most effective as edging to beds and borders and is ideal for container growing.


Sow the seeds in pots or pans under glass in late winter or early spring at a temperature of 15°C (59°F). Prick out the seedlings into boxes and harden off before planting out in late spring.

The plants will grow in ordinary soil, although a moist but well-drained soil gives the best results. Choose a sunny sheltered site.

Pests and diseases

Trouble free.

22. February 2012 by Dave Pinkney
Categories: Annuals, Biennials, Bulbous Plants, Featured Articles | Tags: , , , | Comments Off on Nierembergia: Cup flower


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