Rhododendron Yellow Hammer AGM

Superb small tubular bright yellow flowers in April, (and often again in the early autumn). It has a narrow upright habit which does benefit from pruning to maintain shape. Best in light shade and it does need good drainage. It makes a super cut flower. Height 80-100cm in 10 years.

• Recommended for super bright yellow flowers.
• Easy to grow.
• Ideal position: needs careful site selection.
• Habit: Upright.
• Group: Rhododendron hybrid.
• Parentage: sulfureum (s) X flavidum.
• Hybridization date: pre 1950 (before 1931).
• Bred by: J.C. Williams. Origin: British.
• Ideal soil: pH 4.5 to 6.0
• RHS Hardiness Rating: H5.
• How we usually propagate this plant: Cutting.
• Awards: RHS Award of Garden Merit.

Customer Reviews

By Frances Foderingham on 23rd June 2023

"Excellent purchase very healthy good sizes plant and a speedy delivery "

By Maurice Kimber on 27th May 2023

"The plant arrived on time and in good condition. Well packaged."

Size Guide

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 flowering varieties. Avoid waterlogged sites.

Pruning

Rhododendrons and Camellias: Not normally required. Tidy wayward shoots after flowering.

Evergreen azaleas and Bloombux can be clipped into a low hedge.

Magnolias and Acers: Formative pruning when young to shape into a tree or bush.

Deadheading

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

For further advice see here

Delivery & Returns

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