How to Grow Lupins: Complete UK Care Guide

Lupins are cottage garden favourites, producing tall, densely packed flower spikes in early summer in a striking range of colours. They thrive in sun on well-drained, slightly acidic soil and, once established, reward regular deadheading with a valuable second flush of smaller spikes later in the season. Watch closely for lupin aphid, which can build up rapidly on stems in warm weather.

Attribute	Detail
Botanical name	Lupinus polyphyllus and hybrids
Plant type	Herbaceous perennial (sometimes short-lived)
Height & spread	60cm–1.2m tall, 45–60cm spread
Hardiness	RHS H6 (fully hardy)
Position	Full sun to light shade
Soil	Well-drained, slightly acidic, moderately fertile
Flowering period	June to July, second flush August
Difficulty	Easy to moderate

Choosing varieties

The Band of Nobles series remains a popular choice for reliable colour, while West Country lupins offer bicolour spikes bred for vigour and disease resistance.

Variety	Flower colour	Height	Notes
Lupinus 'The Governor'	Blue and white bicolour	90cm	Band of Nobles series, classic cottage garden choice
Lupinus 'Chandelier'	Yellow	90cm	Bright, long spikes
Lupinus 'The Chatelaine'	Pink and white	85cm	Reliable bicolour form
Lupinus 'Persian Slipper'	Deep blue-purple	90cm	West Country lupin, good vigour
Lupinus 'Gallery Red'	Red	50cm	Compact, suits smaller borders or pots

Where and when to plant

Plant young lupins in spring or early autumn in an open, sunny position with free-draining soil; they dislike heavy, waterlogged clay and rich, recently manured ground. Lupins pair well with irises and oriental poppies in a traditional herbaceous border. Browse more ideas in our perennials and how-to sections.

How to plant lupins

1. Choose a sunny spot with well-drained, slightly acidic soil.
2. Dig a hole slightly larger than the root ball, avoiding freshly manured ground.
3. Tease out any circling roots gently before planting.
4. Set the plant at the same depth it was growing in its pot.
5. Backfill, firm in and water well to settle the roots.
6. Space plants 45–60cm apart to allow air movement around foliage.

Watering and feeding

Water young lupins regularly until established, then water during dry spells, particularly while in bud and flower. Avoid rich, high-nitrogen feeds, which encourage soft, aphid-prone growth; a light spring mulch of well-rotted compost is usually sufficient.

Cutting back and deadheading

Cut the main flower spike back to a healthy leaf once flowers fade, before seed pods form, to redirect energy into side shoots. This deadheading often produces a lighter second flush of flower spikes in late summer. Cut all growth back to ground level once foliage dies back in autumn.

Dividing and propagation

Lupins resent root disturbance and are best raised from seed rather than divided. Sow seed in spring or early autumn, soaking overnight or nicking the tough seed coat with a knife to improve germination. Named varieties can also be increased from basal cuttings taken in spring.

Growing in pots

Compact varieties such as 'Gallery Red' suit large pots of at least 30cm diameter filled with peat-free, loam-based compost. Ensure good drainage with crocks or grit in the base, water regularly through the growing season, and feed sparingly to avoid weak, floppy growth.

Common problems

Problem	Symptom	Fix
Lupin aphid	Dense grey-green aphid clusters on stems and buds	Check from late spring, wash off with water, encourage natural predators
Slugs and snails	Young shoots eaten to the ground	Protect emerging growth with barriers or torchlight checks
Powdery mildew	White coating on leaves in late summer	Improve air circulation and water at the base, not over foliage
Root rot	Wilting and collapse in waterlogged soil	Improve drainage before planting; avoid heavy clay sites

Month-by-month care calendar

Month	Task
March	Sow seed under cover; prepare planting sites
April	Plant out young lupins; watch for slugs
May	Stake tall varieties; check for early aphids
June	Peak flowering; monitor for lupin aphid
July	Deadhead spent spikes for a second flush
August	Enjoy second flush; continue deadheading
September	Sow seed for new plants; tidy fading foliage
October	Cut back dying growth to ground level
November	Mulch borders lightly for winter protection
December	Order seed catalogues and plan new varieties
January	Chit or soak seed ready for spring sowing
February	Prepare soil, improving drainage where needed