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Burncoose Nurseries - part of the Caerhays Estate
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  • RHODODENDRON 'May Day'
    RHODODENDRON 'May Day'
    © Burncoose Nurseries, all pictures for illustrative purposes only.
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    RHODODENDRON 'May Day'  RHODODENDRON 'May Day'  RHODODENDRON 'May Day'  RHODODENDRON 'May Day'  MAGNOLIA 'Ricki' and RHODODENDRON 'May Day'
© Burncoose Nurseries, all pictures for illustrative purposes only. MAGNOLIA 'Ricki' and RHODODENDRON 'May Day'
© Burncoose Nurseries, all pictures for illustrative purposes only. MAGNOLIA 'Ricki' and RHODODENDRON 'May Day'
© Burncoose Nurseries, all pictures for illustrative purposes only. MAGNOLIA sargentiana var robusta and RHODODENDRON
© Burncoose Nurseries, all pictures for illustrative purposes only.
    >

    RHODODENDRON 'May Day'

     AWARD
    RHODODENDRON HYBRIDS

    Scarlet
    plant size comparison icon
    2 to 3 Litre   - Click to view photo
    Delivery Information
    Available late spring to early summer 2026
    £24.00 each 
    MULTIBUY SAVING
    Any 3+ £22.00 each
    Available late spring to early summer 2026 - Spring according to the Met Office is defined as March 1st - May 31st. Therefore late spring is mid-April onwards. This is not a guaranteed date but an estimate and subject to availability.
     
    Full Plant Details - Sun/Soil & other attributes
    • Flowering
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      Jan
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      Feb
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      Mar
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      Apr
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      May
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      Jun
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      Jul
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      Aug
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      Sep
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      Oct
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      Nov
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      Dec
    • Burncoose speciality
      See Burncoose Speciality group for more details
    • Good to know
      R. griersonianum x R. haematodes. Shallow planting is essential
    • Pests & Diseases
      Vine weevils, scale insects, honey fungus, powdery mildew, bud blast.
    • Place of origin
      Garden origin. UK. 1932. AM Williams, Werrington, Cornwall
    • Caerhays bred plants
    • Rhododendrons
    • Rhododendron
    • Evergreen
      Large leaves 15-45cm (6-18in) long.
    • Red
      Scarlet
    • Frost hardy (down to -5)
    • Entire
    • Oblanceolate
    • Height
      1.5m (5ft)
    • Spread
      1.5m (5ft)
    • Medium shrub
      Typically grow to around 4-6 feet in height
      Low growing, spreading habit. Produces loose trusses of slightly pendent, funnel-shaped flowers 7cm (3½in) long
    • Pruning group 5
      Suitable for: Evergreen shrubs that require minimal pruning.
      Action: Trim or lightly cut back shoots that spoil symmetry. Deadhead regularly.
      When: Annually after flowering.

    • Half hardy - unheated greenhouse / mild winter
      Hardy in coastal and relatively mild parts of the UK except in severe winters and a risk from sudden (early) frosts. May be hardy elsewhere with wall shelter or good micro-climate. Likely to be damaged or killed in cold winters. Plant can withstand temperatures down to -5°C (23°F)
    • Spring Seasonal Interest
    • Summer Seasonal Interest
    • Acid / ericaceous loving
      Ideally pH 4.5-6.0
    • Fertile moist well-drained soil
      Humus-rich.
    • Neutral to acid soil
    • Full sun
      Shelter from strong winds
    • Partial shade
      Maintains colour better in light shade.
    • harmful if eaten
      People and pets, i.e. cats, dogs, rabbits, rodents, tortoises
    • Rabbit Resistant
    • Mature Size
      1.5m (5ft)
      Medium Shrub - guide for size not form Watering Can
        1.5m (5ft)
       
    View Detailed Plant Description

     

    View Planting Tips and Care Advice
    Cold weather damage to evergreen plants
    Shrubs and Trees - Seeds - 3) Planting Seeds
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    Useful extras...

    Fertilisers & Feeds - Empathy
    Specially developed organic concentrated seaweed feed for ericaceous plants that is a ready to use, derived from sustainable harvested kelp, that can be used on all outdoor and indoor plants, Perfect used in conjunction with Rootgrow™ Ericoid.
    1 ltr
    £8.50
    Vermin & Pest Control
    Slug killer blue mini pellets are easy to use and give effective control of slugs and snails. Ideal in garden, conservatory or greenhouse.
    800g
    £6.50
    Fertilisers & Feeds - Empathy
    Recommended by the RHS. Contains Rootgrow™ mycorrhizal fungi. Suitable for all trees and shrubs (except rhododendrons, azaleas, heathers, cranberries and blueberries)
    Small - 60g sachet
    £3.00
    Medium - 150gm sachet
    £6.00
    Large - 360gram sachet
    £12.00
    Unavailable
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