Rhododendron Horizon Monarch  AGM

Rhododendron Horizon Monarch AGM


  • Interesting Foliage: No
  • Scent: Not Scented
  • Hardiness: To -15 °C
  • Flowering Month: May
  • Height After 10 Years: 150-175cm
  • Flower Colour: Yellow

Available Options Sizing Chart

Below are the available purchase options. Please enter a quantity for the specific size(s) you require.

  • in stock In Stock Size Now: 7.5 litre Price: £23.95
  • in stock In Stock Size Now: 60-70cm Price: £125.00
  • in stock In Stock Size Now: 70-80cm Price: £149.00

Product Description

This is another of our favourites - lovely red buds open to large pale yellow flowers with pink tones and a small vivid red flare. Flowering in May this is an exceptional hybrid with a strong growing habit, it is dense and compact and has fabulous deep green foliage. Height 150-180cm in 10 years, slightly wider than it is in height.

As with all yellow Rhododendrons, this plant does need good drainage (but not dry conditions!). Can be used for hedging and screening.  

  • Recommended for: stunning yellow flowers.
  • Plantsman range.
  • Ideal position: Dappled shade, needs careful site selection.
  • Habit: Dense.
  • Group: Hybrid Rhododendron.
  • Parentage: 'Nancy Evans' X 'Point Defiance'.
  • Hybridization date: pre 2000 (1981).
  • Bred by: E. C. Brockenbrough. Origin: American.
  • Ideal soil: pH 4.5 to 6.
  • RHS Hardiness Rating: H5.
  • How we usually propagate this plant: Graft.
  • Awards: RHS Award of Garden Merit.

Available Sizes

 7.5 litre

Customer Reviews

4 stars Write a Review
  • 4 stars
    Gorgeous big blooms 13 Mar 2017


    I love the larger Rhodos. The flowers are larger than usual on this one, although it doesn't flower as well as I'd like some years. Still worth buying though because when it does flower it's stunning.

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