Plants by mail order since 1984 - over 4,100 plants online today!
Burncoose Nurseries - part of the Caerhays Estate
Nursery & Gardens open: Mon - Sat 08.30 - 16.30(Office 09.00- 16.30) & Sun 10:00 - 16:00
Pop up café: Cafe now open Wed - Sun 10.00 to 15.00
  • A
  • B
  • C
  • D
  • E
  • F
  • G
  • H
  • I
  • J
  • K
  • L
  • M
  • N
  • O
  • P
  • Q
  • R
  • S
  • T
  • U
  • V
  • W
  • X
  • Y
  • Z
  • or use plant finder
  • DAHLIA 'Knockout'
    © Burncoose Nurseries, all pictures for illustrative purposes only.
    <
    DAHLIA 'Knockout'  DAHLIA 'Knockout'  DAHLIA 'Knockout'  DAHLIA 'Knockout'  CROCOSMIA and DAHLIA 'Knockout'
© Burncoose Nurseries, all pictures for illustrative purposes only. DAHLIA 'Knockout' and DAHLIA 'Moonfire'
© Burncoose Nurseries, all pictures for illustrative purposes only. DAHLIA 'Knockout' and DAHLIA 'Moonlight'
© Burncoose Nurseries, all pictures for illustrative purposes only.
    >

    DAHLIA 'Knockout'

     AWARD
    Dwarf form. Large bright yellow ribbed, sunflower-like blooms with prominent orange centres. Black lacquered foliage
     
    Full Plant Details - Sun/Soil & other attributes - Click to close
    • Flowering
      local_florist
      Jan
      local_florist
      Feb
      local_florist
      Mar
      local_florist
      Apr
      local_florist
      May
      local_florist
      Jun
      local_florist
      Jul
      local_florist
      Aug
      local_florist
      Sep
      local_florist
      Oct
      local_florist
      Nov
      local_florist
      Dec
    • Good to know
      Wildlife plant - nectar and pollen for insects. Very suitable for containers. Mystic series (Mystic Illusion)
    • Pests & Diseases
      Slugs, earwigs, caterpillars, mosaic rust, powdery mildew
    • Place of origin
      Garden origin. New Zealand. Dr. Keith Hammett
    • Orange
      Orange centres
    • Yellow
    • Single
      Row of petals round conspicuous stamens - no more than 8 petals
    • Border
      Suits a mixed or herbaceous border
    • Cottage garden
    • Patio / pot plants
    • Suitable for small gardens
    • Frost hardy (down to -5)
    • Height
      To 1m (39in)
    • Spread
      60cm (24in)
    • Tuberous
      Upright, bushy, clump-forming tuberous perennial. Flowers 10cm (4in) across
    • 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)
    • Autumn Seasonal Interest
    • Summer Seasonal Interest
    • Fertile moist well-drained soil
      Humus-rich
    • Full sun
    • Bee friendly
    • Rabbit Resistant
    View Detailed Plant Description

     

    View Planting Tips and Care Advice
    View Customers Also Bought
    DAHLIA 'Moonfire'

    DAHLIA 'Moonfire'

    Available from £12.50
    DAHLIA 'Roxy'

    DAHLIA 'Roxy'

    Available from £12.50
    DAHLIA 'Bishop of Llandaff

    DAHLIA 'Bishop of Llandaff

    Available from £12.50
    RUDBECKIA fulgida 'Goldsturm'

    RUDBECKIA fulgida 'Goldsturm'

    Coneflower
    Available from £13.50

    Useful extras...

    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
    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
    Vermin & Pest Control
    This is a non-biological non-chemical plant insecticide and mildewcide. Works against the physical motion of the insect. Perfect for all plants and edible crops.
    500 ml
    £8.00
    arrow_drop_up