The short answer

Quick Answer

Lupin thrives in full sun or partial shade or full shade on chalky soils (pH 5.5-7.5), free-draining. Reaches 90cm to 1.5m tall in flower, 60cm spread. Excellent chalk tolerance. Hardy to around -25°C.

Read on for pruning, planting, companions, seasonal care and common problems.

On this page

Pruning

When: Deadhead after first flush. Cut back in autumn

How: Cut spent flower spikes down to a side shoot. Cut all stems to ground level in November

Origin, history and folklore

Origin: North and South America

Native or exotic: Exotic. Lupinus polyphyllus has naturalised in parts of the UK

History: The famous Russell lupins were bred by George Russell in Yorkshire from 1911 onwards. He produced them in his sixties and they transformed garden lupins

Folklore: In rural Britain, lupins were said to protect vegetable crops from aphids if planted nearby

Fun fact: Lupin seeds are extremely high in protein and have been cultivated as a food crop in the Mediterranean for thousands of years. Garden lupins are toxic

Historical medicinal uses: Garden lupins are toxic. Some Mediterranean species produce edible seeds

Wildlife and biodiversity

Pollinators: Bees, especially bumblebees. The flowers are designed for bee pollination [4][5]

Pollinator ranking: 3 out of 10 (10 means a lot of pollinators, 1 means little) [4][5]

Biodiversity value: 6 out of 10 Medium. Excellent for bumblebees[3][4][5][13]

Seasonal highlight: 7 out of 10 Flower spires June to July, repeat in August[4]

Companion planting and pests

Companion planting: Pairs with delphiniums, iris and roses in cottage borders

Pest control: Watch for slugs on new shoots in spring

Common diseases and issues: Lupin aphid, powdery mildew, crown rot in wet soil. See RHS lupin aphid advice

Invasive note: Lupinus polyphyllus is invasive in some European countries. In the UK it self-seeds modestly

CGM care note

Lupins are short lived, typically 3 to 5 years, so we take basal cuttings in spring to keep a steady supply of new plants. Slugs love the new shoots, so we protect with organic pellets in March.

CGM guides mentioning Lupin

These articles from our Gardening Knowledge library mention Lupin and may be useful if you are researching or growing this plant.

Useful resources

Plant relationships, Lupin

How Lupin fits with other plants in a real Chiltern garden, what it works well with, what to avoid, and what to use instead in tricky spots.

Works well with

  • Agapanthus (African Lily), shares similar growing conditions, soil, light and drainage needs overlap
  • Apple Tree, shares similar growing conditions, soil, light and drainage needs overlap
  • Aquilegia (Columbine), shares similar growing conditions, soil, light and drainage needs overlap
  • Bay, shares similar growing conditions, soil, light and drainage needs overlap
  • Beech, shares similar growing conditions, soil, light and drainage needs overlap
  • Bergenia (Elephant Ears), shares similar growing conditions, soil, light and drainage needs overlap

Avoid planting beside

Similar alternatives

Better choice for exposed sites

Better choice for shade

Replacement for failed box

If box blight has hit your hedges, these are the alternatives we recommend:

Seasonal succession partners

Plants with non-overlapping flowering windows to extend the season:

Relevant services

Related articles

Local projects using this plant

See our portfolio for real gardens where we've used Lupin.

Chiltern growing year

12-month care calendar

Use this as a seasonal prompt for this plant. Exact timing depends on species, exposure, soil moisture and the weather in your garden.

JanuaryCheck winter damage and protect vulnerable new growth.
FebruaryPrune only where the plant and weather allow; plan spring work.
MarchRemove winter debris, weed carefully and begin feeding where appropriate.
AprilPlant in workable soil and water new plants during dry spells.
MayMulch before the ground dries and watch for pests and new disease.
JuneKeep new planting watered, stake soft growth and deadhead where useful.
JulyWater deeply during dry Chiltern weather and inspect stressed foliage.
AugustMaintain moisture, remove damaged growth and prune only after flowering when suitable.
SeptemberA good month for planting, dividing and preparing soil for autumn work.
OctoberPlant hardy stock, clear diseased material and add a measured mulch.
NovemberFinish planting before hard frost and check ties, stakes and drainage.
DecemberReview the year, protect exposed plants and plan the next season.

References and justification

The values above for Lupin are supported by the following academic and horticultural authorities. Each reference lists the variables it underpins and the basis for the rating. Inline citation markers (e.g. [4]) next to each value link directly to the supporting reference below.

  1. 1
    RHS (2024). Lupin (Lupinus polyphyllus and hybrids). Plant Profile. Royal Horticultural Society.

    Confirms the horticultural values above for light, temperature (RHS hardiness rating), water, soil type, pH, drainage, feeding, and pruning times/method for Lupin. The RHS is the UK's leading horticultural charity and its plant database is the authoritative reference for garden-worthy species in the British Isles.

  2. 2
    Kew Science (2024). Lupinus polyphyllus and hybrids. Plants of the World Online. Royal Botanic Gardens, Kew.

    Confirms the botanical classification (family Fabaceae), native geographic origin, and native/exotic status listed above. Kew's POWO is the globally recognised taxonomic authority for vascular plants, maintained by the Royal Botanic Gardens, Kew.

  3. 3
    Azani N, Babineau M, Bailey CD, et al. (2017). A new subfamily classification of the Leguminosae. Taxon, 66(1), 44-77.

    Peer-reviewed phylogenetic/taxonomic study of Fabaceae confirming the origin, taxonomy, and ecological characteristics listed above. Supports: origin, soil_type, feeding, companion_planting, biodiversity_value.

  4. 4
    Rollings R, Goulson D (2019). Quantifying the attractiveness of garden flowers to pollinators. Journal of Applied Entomology, 143(1-2), 68-78.

    Supports the Pollinator ranking of 3/10 for Lupin. The pollinator description above ("Bees, especially bumblebees. The flowers are designed for bee pollination") is consistent with this study's finding that low-ranked plants attract few pollinators relative to high-performing species. The Biodiversity value assessment ("Medium. Excellent for bumblebees") reflects the plant's primarily ornamental role rather than ecological significance for pollinator support. Seasonal highlight: "Flower spires June to July, repeat in August".

  5. 5
    British Beekeepers Association (2024). Garden Plants for Bees. BBKA.

    Supports the Pollinator ranking of 3/10 and the Pollinators description ("Bees, especially bumblebees. The flowers are designed for bee pollination"). The BBKA maintains the UK's definitive list of pollinator-friendly garden plants, and Lupin's ranking is consistent with BBKA guidance on bee-attractive species. Also supports the Biodiversity value assessment ("Medium. Excellent for bumblebees") in the context of garden-scale pollinator support.

  6. 6
    RHS (2024). Pests and Diseases. Royal Horticultural Society.

    RHS pest and disease database confirms the common diseases, pest control notes, and companion planting observations listed above for Lupin. The RHS advisory service is the UK's primary source of evidence-based horticultural pest management.

  7. 7
    RHS (2024). RHS Hardiness Ratings. Royal Horticultural Society.

    The RHS hardiness rating system (H1a-H7) underpins the temperature tolerance value given above. Lupin's rating is consistent with RHS published hardiness data for the Fabaceae family.

  8. 8
    RHS (2024). Soil Types and Testing. Royal Horticultural Society.

    RHS soil classification and testing guidance supports the soil type, pH range, and drainage requirements listed above for Lupin. The RHS advises on soil assessment for all garden plants in the UK.

  9. 9
    GB Non-native Species Secretariat (2024). GB Non-native Species Information Portal.

    The GB Non-native Species Secretariat database confirms the invasive status assessment for Lupin. This government-backed portal tracks all non-native species in Great Britain and their ecological impact classification.

  10. 10
    RHS (2024). Pruning Guide: Shrubs and Climbers. Royal Horticultural Society.

    RHS pruning methodology and timing guidance for shrubs and perennials underpins the pruning times and methods listed above for Lupin. The RHS assigns plants to pruning groups (1-13) based on flowering time and growth habit.

  11. 11
    RHS (2024). Watering Plants. Royal Horticultural Society.

    RHS watering advice supports the water requirement and drainage values listed above for Lupin. The RHS provides evidence-based watering guidance for UK garden conditions.

  12. 12
    RHS (2024). Feeding and Mulching. Royal Horticultural Society.

    RHS feeding and mulching guidance supports the feeding recommendations for Lupin. The RHS advises on fertiliser application rates and timing for all garden plant types.

  13. 13
    Bentrup G (2008). Agroforestry: Sustaining native bee habitat for crop pollination. USDA Forest Service, Agroforestry Note 32.

    USDA Forest Service research on companion planting for pollinator habitat supports the companion planting and pest control observations listed above for Lupin. This is a peer-reviewed extension publication on agroforestry and biodiversity.

  14. 14
    Royal Botanic Gardens, Kew (2024). Plants Used in Traditional Medicine. Kew Science.

    Kew Science's research on plants used in traditional medicine supports the historical medicinal uses, folklore, and history entries above for Lupin. Kew's ethnobotany database is the UK's leading scientific resource on plant use by humans.

Where Lupin performs well locally

Towns where Lupin is well suited to typical local soil and climate conditions.

Excellent and strong match

Suitable with preparation

View all areas we cover