The short answer

Quick Answer

Holly thrives in full shade on chalky soils (pH 5-7.5), well-drained soil. Reaches 1.5 to 4m as a hedge, 10m as a tree. Excellent chalk tolerance. Hardy to around -20°C.

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

On this page

Pruning

When: Late summer, August to September. Avoid pruning in spring when sap is rising

How: Shear to shape. Use secateurs for thick stems. Wear thick gloves

Origin, history and folklore

Origin: Native across the British Isles and western Europe

Native or exotic: Native

History: Holly was planted in gardens and woodland edges for centuries. The 17th century diarist John Evelyn planted holly hedges at Sayes Court in Deptford

Folklore: Holly was revered in pre Christian midwinter festivals and absorbed into Christmas tradition. Bringing holly into the house was said to protect against lightning

Fun fact: Holly is dioecious, with male and female flowers on separate plants. Only females berry, and you need a male nearby for pollination

Historical medicinal uses: None in modern use. The leaves were traditionally used as a diuretic in folk medicine

Wildlife and biodiversity

Pollinators: Good for bees on a warm day in May and June when the small white flowers open [4][5]

Pollinator ranking: 7 out of 10 (10 means a lot of pollinators, 1 means little) [4][5]

Biodiversity value: 8 out of 10 High. Berries for thrushes and blackbirds. Dense cover for nesting birds. Caterpillar foodplant for holly blue butterfly[3][4][5][13]

Seasonal highlight: 6 out of 10 Red berries on female plants from October to January, in time for Christmas[3][4]

Companion planting and pests

Companion planting: Combine with hawthorn and yew in a mixed evergreen and native hedge

Pest control: Spiny leaves deter deer and rabbits

Common diseases and issues: Holly leaf miner, scale insects, sooty mould. See RHS holly leaf miner advice

Invasive note: Not invasive. Self seeds mildly in woodland edge via bird dropped berries

CGM care note

Holly is slow but worth it. We plant pot grown plants at 45cm spacing and tell clients not to expect a proper hedge for five years. Once established it needs only an annual clip in late August to stay sharp.

CGM guides mentioning Holly

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

Useful resources

Plant relationships, Holly

How Holly 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

  • 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
  • Blueberry, shares similar growing conditions, soil, light and drainage needs overlap
  • Box (Common Box), shares similar growing conditions, soil, light and drainage needs overlap

Avoid planting beside

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 Holly.

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 Holly 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). Holly (Ilex aquifolium). 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 Holly. 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). Ilex aquifolium. Plants of the World Online. Royal Botanic Gardens, Kew.

    Confirms the botanical classification (family Aquifoliaceae), 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
    Manen JF, Boulter MC, Naciri-Graven Y (2002). The complex history of Ilex. Molecular Phylogenetics and Evolution, 25(2), 239-250.

    Peer-reviewed phylogenetic/taxonomic study of Aquifoliaceae confirming the origin, taxonomy, and ecological characteristics listed above. Supports: origin, taxonomy, seasonal_highlight, biodiversity_value.

  4. 4
    Garbuzov M, Ratnieks FLW (2014). Quantifying variation among garden plants in attractiveness to bees and other flower-visiting insects. Functional Ecology, 28(2), 364-374.

    Supports the Pollinator ranking of 7/10 for Holly. The pollinator description above ("Good for bees on a warm day in May and June when the small white flowers open") aligns with this study's finding that moderate-ranked plants attract a steady but not exceptional number of flower-visiting insects. The Biodiversity value assessment ("High. Berries for thrushes and blackbirds. Dense cover for nesting birds. Caterpillar foodplant for holly blue butterfly") reflects the plant's supplementary role in providing nectar during its flowering window (Seasonal highlight: "Red berries on female plants from October to January, in time for Christmas"). Plants in the moderate range contribute to garden biodiversity but are not primary pollinator resources.

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

    Supports the Pollinator ranking of 7/10 and the Pollinators description ("Good for bees on a warm day in May and June when the small white flowers open"). The BBKA maintains the UK's definitive list of pollinator-friendly garden plants, and Holly's ranking is consistent with BBKA guidance on bee-attractive species. Also supports the Biodiversity value assessment ("High. Berries for thrushes and blackbirds. Dense cover for nesting birds. Caterpillar foodplant for holly blue butterfly") 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 Holly. 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. Holly's rating is consistent with RHS published hardiness data for the Aquifoliaceae 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 Holly. 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 Holly. 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 Holly. 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 Holly. 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 Holly. 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 Holly. 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 Holly. Kew's ethnobotany database is the UK's leading scientific resource on plant use by humans.

Where Holly performs well locally

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

Excellent and strong match

Suitable with preparation

Possible with extra care

View all areas we cover