Highlights

Versatile Perennial – Thrives in borders, containers, or beds for flexible garden design.
Striking Blooms – Pale blue flowers with darker stripes appear in summer, adding subtle colour.
Seasonal Interest – Deciduous habit brings changing texture and form throughout the year.
Easy to Grow – Low-maintenance and ideal for both beginner and experienced gardeners.
Unique Foliage – Strap-shaped leaves create depth and contrast in mixed plantings.
Drought Tolerant – Once established, tolerates dry periods for reliable performance.
Sun-Loving – Prefers full sun but copes with partial shade in most UK gardens.

We're offering you a 3 or 6 Agapanthus Donau Plants for £4.99, saving you up to 62% off Thompson and Morgan's's price of £12.98 (correct as of 21.04.2026).

Agapanthus 'Donau' Plant

Add effortless elegance to your garden with Agapanthus 'Donau'. This perennial is celebrated for its showy umbels of pale blue flowers, each petal marked by a striking darker stripe. Native to South Africa, Agapanthus (also known as African Lily) is prized in UK gardens for its architectural form and reliable summer blooms.

Why Choose Agapanthus 'Donau'?

Long-lasting Summer Colour: Enjoy beautiful blooms from July through September.
Distinctive Texture: Strap-shaped foliage adds structure and contrast even when not in flower.
Seasonal Appeal: Deciduous growth means fresh new leaves each spring and changing interest through autumn.
Low Maintenance: Minimal care required—ideal for busy gardeners or those new to perennials.

Growing Guide

Planting Time: Best planted in spring after the last frost or in early autumn while the soil is still warm.
Location: Prefers full sun but will tolerate light shade. Choose a sheltered spot to protect from harsh winter winds.
Soil: Well-drained, moderately fertile soil is ideal. Avoid waterlogged sites; containers work well too.
Watering: Water regularly during the first growing season. Once established, Agapanthus tolerates dry spells.
Feeding: Apply a balanced fertiliser in spring as new growth emerges for best flowering.
Hardiness: Hardy in most UK regions (to about -5°C); mulch crowns over winter in colder areas or grow in pots for easy winter protection.

Caring for Your Agapanthus

Pruning: Remove spent flower stems after blooming to encourage more flowers next year.
Pests & Diseases: Generally pest-free; watch for slugs on young shoots.
Pots & Borders: Compact habit makes 'Donau' perfect for patio pots or as a border accent.

Schemes & Companions

Pair with grasses, lavender, or salvia for a Mediterranean look.
Makes an excellent focal point in mixed perennial beds or formal borders.

FAQs

When is the best time to plant Agapanthus 'Donau'?
The ideal time is spring after the last frost, or early autumn before cold weather sets in.
How tall do these plants grow?
'Donau' typically reaches up to 60-80cm (24-32 inches) in height when mature.
What care does Agapanthus need over winter?
Add a mulch layer over crowns in colder areas or move pots to a frost-free place to protect roots from freezing temperatures.