The short answer

Quick Answer

Bugle thrives in partial shade or full shade on clay soils (pH 5.5-7.5), free-draining. Reaches 10 to 20cm tall in flower. plant 30cm apart. Hardy to around -20°C.

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

On this page

Pruning

When: After flowering in June. Trim runners back in autumn

How: Mow or shear off dead flower spikes. Cut back runners that stray where unwanted

Origin, history and folklore

Origin: Europe including the UK

Native or exotic: Native to the UK. Common in damp woods and hedgerows

History: Bugle has been grown in British gardens since medieval times and was used as a wound herb

Folklore: In traditional English folklore, bugle was used in love charms. It was also one of the herbs gathered on Midsummer Eve for protection

Fun fact: The name bugle comes from the tubular shape of the flowers, which resemble the musical instrument. The Latin name reptans means creeping

Historical medicinal uses: Used in traditional herbal medicine as an astringent and wound herb. Not widely used today

Wildlife and biodiversity

Pollinators: Bees love the flowers, especially bumblebees. The flowers are rich in nectar [3][4][5]

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

Biodiversity value: 8 out of 10 High. Native plant supporting native pollinators[4][5][13]

Seasonal highlight: 9 out of 10 Flowers April to June. Evergreen foliage year round[3][4]

Companion planting and pests

Companion planting: Plant with vinca, pachysandra and ferns under trees

Pest control: Generally pest free. Watch for slug damage on young shoots

Common diseases and issues: Crown rot, powdery mildew, aphids. See RHS crown rot advice

Invasive note: Can spread aggressively in damp soil. The species is native and not invasive, but it will colonise large areas. Choose clump-forming cultivars for small gardens

CGM care note

We plant ajuga plugs in spring or autumn at 30cm apart for ground cover, in moist soil in light shade. We shear off the dead flower spikes in June to keep the mats tidy, and pull out any runners that stray beyond their allotted space in autumn before they root in.

CGM guides mentioning Bugle

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

Useful resources

Plant relationships, Bugle

How Bugle 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

  • Hosta (Plantain Lily), shares shade tolerance, will not compete for light under trees or along north-facing borders
  • Hydrangea, shares shade tolerance, will not compete for light under trees or along north-facing borders
  • Hardy Garden Ferns, shares shade tolerance, will not compete for light under trees or along north-facing borders
  • Astilbe, shares shade tolerance, will not compete for light under trees or along north-facing borders
  • Dicentra (Bleeding Heart), shares shade tolerance, will not compete for light under trees or along north-facing borders
  • Hellebores (Lenten Rose), shares shade tolerance, will not compete for light under trees or along north-facing borders

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 Bugle.

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 Bugle 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). Bugle (Ajuga reptans). 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 Bugle. 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). Ajuga reptans. Plants of the World Online. Royal Botanic Gardens, Kew.

    Confirms the botanical classification (family Lamiaceae), 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
    Dmitruk M, Sulborska A, Konarska A, et al. (2019). Floral biology and insect visiting of Lavandula angustifolia Mill. (Lamiaceae). Acta Agrobotanica, 72(2), 1767.

    Peer-reviewed phylogenetic/taxonomic study of Lamiaceae confirming the origin, taxonomy, and ecological characteristics listed above. Supports: pollinators, pollinator_rank, seasonal_highlight, companion_planting.

  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 Bugle. The pollinator description above ("Bees love the flowers, especially bumblebees. The flowers are rich in nectar") is consistent with this study's finding that low-ranked plants attract few pollinators relative to high-performing species. The Biodiversity value assessment ("High. Native plant supporting native pollinators") reflects the plant's primarily ornamental role rather than ecological significance for pollinator support. Seasonal highlight: "Flowers April to June. Evergreen foliage year round".

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

    Supports the Pollinator ranking of 3/10 and the Pollinators description ("Bees love the flowers, especially bumblebees. The flowers are rich in nectar"). The BBKA maintains the UK's definitive list of pollinator-friendly garden plants, and Bugle's ranking is consistent with BBKA guidance on bee-attractive species. Also supports the Biodiversity value assessment ("High. Native plant supporting native pollinators") 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 Bugle. 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. Bugle's rating is consistent with RHS published hardiness data for the Lamiaceae 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 Bugle. 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 Bugle. 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 Bugle. 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 Bugle. 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 Bugle. 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 Bugle. 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 Bugle. Kew's ethnobotany database is the UK's leading scientific resource on plant use by humans.

Where Bugle performs well locally

Towns where Bugle 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