AGM
Rhododendron Polaris  AGM STANDARD

Rhododendron Polaris AGM STANDARD

Item: DPOL

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Flowering Month:
May
Flower Colour:
Pink
Hardiness:
Below -20 °C
Height After 10 Years:
75-100cm
Scent:
Not Scented
Interesting Foliage:
No

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This tough plant has red buds opening to ruby pink, ruffled flowers with a paler centre in May. It has good foliage and is sun and cold tolerant. These standards have a clear stem of about 60cm, with a lollipop head of foliage and flower on top. Currently the size of the well-branched head is about 30cm, and it will grow to around 80cm in 10 years.

Standards will always require staking with a good tree-tie to prevent wind damage, and a fairly sunny position. We recommend pruning of the previous year's growth after flowering, to preserve the neat shape of the flower head. Any shoots developing on the stem or from the ground should also be removed to preserve the clear stem.

  • Ideal for containers and formal situations.
  • A tough variety that is easy to grow.
  • Group: yakushimanum.
  • Parentage: yakushimanum 'Koichiro Wada'(s) X 'Omega'. Also known as Hachmann's Polaris.
  • Hybridization date: pre 2000 (1963).
  • Bred by: Hanns Hachmann. Origin: German.
  • Habit: Compact.
  • Ideal position: Most garden situations avoiding too much wind.
  • Ideal soil: pH 4.5 to 6.
  • RHS Hardiness Rating: H6.
  • How we usually propagate this plant: Graft.
  • Awards: RHS Award of Garden Merit.

Good to know

Standard Rhododendrons (grown on a stem) were popular during the first half of the twentieth century, and are now finding renewed interest. We grow a limited range of rhododendrons and azaleas as standards, grown on a single straight stem of various heights. These are ideal for patio pots or formal situations (and better looking than a Bay tree!).

Please note: Standards require a good stake throughout their life to prevent wind damage. Taller standards are suitable for growing in the ground, but only short standards should be grown in pots, so that they are not blown over in high winds. If growing in containers, repot into a slightly larger pot every 3 years, using a good ericaceous compost.


For further advice, For further advice, see here

The Basics

Ideal soil

Acidic soil, good organic content, pH 4.5-6.0. Inkarho range of rhododendrons will tolerate soils up to pH7.5

Sun or Shade

Light dappled shade is best for most varieties.

Shelter

Refer to hardiness rating. Give young plants protection.

Site Selection

Avoid close to trees, roots, invasive weeds, walls, hot patios, dry banks and waterlogged soils. Do not use weed matting or stone mulch

Plant spacing

Use the height shown in 10 years as a guide to the distance between each plant. Allow room for plant to fill out. If planting closer for instant impact, be prepared to move plants after a few years.

Compost

  • 3 litre pot, dig in 10-20 litres of ericaceous compost.
  • 7.5 litre pot, dig in 20-30 litres of ericaceous compost.
  • 70-80cm specimen, dig in 60 litres of ericaceous compost.
  • 100-120cm specimen, dig in 120 litres of ericaceous compost.

Planting depth

Plant high in the ground, with the top of the rootball visible.

Feeding

Slow-release ericaceous feed recommended in March and straight after flowering.

Mulch

Recommended every few years.

Water

The key ingredient! Keep moist all season, especially the critical time at end of June for flower bud initiation. Tap water is better than no water. Heavy dose at least once per week in dry weather.

Drainage

Ensure good drainage in winter, especially with yellow varieties. Avoid waterlogged sites.

Pruning

Not normally required. Tidy wayward shoots after flowering. Evergreen azaleas and Bloombux can be clipped into a low hedge.

Deadheading

Remove old flower-heads, particularly on young or weak plants.


For further advice see here

Size Guide

Size guide

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