Rhododendron Inkharo Purpureum Grandiflorum

Rhododendron Inkharo Purpureum Grandiflorum

Description: This grafted form combines the very popular old variety of Purpureum Grandiflorum which actually dates back to before 1850, with the rootstock characteristics of the newly introduced lime tolerant for Inkarho.  A compact and spreading habit with mass of rich purple flowers late May to June against the lush green foliage.  

Uses: Suited to growing on soils where rhododendrons are not usually recommended.

Climate/Position: Sheltered shady position

Height/Spread: 2m x 2 metres.

Soil Requirements: A lime tolerant Rhododendrons so of note as can be grown in any free draining soil rather than only in a low pH soil.

Pruning: Generally avoid pruning. Flower stalks can be pinched out (by finger and thumb rather than secateurs) when flowering is complete. Well established plants will respond well to regenerative pruning if required.

Special Requirements: Applying a mulch regularly around the plant will help moisture retention in the soil. Where plants struggle a little if not grown in soil with low pH, then Rhododendrons will always benefit from an annual feed of sequestered iron to ensure the plants do not suffer from iron deficiency which is indicated by interveinal chlorosis or yellowing of leaves between the veins.

Additional Interest:   Purpureum Grandiflorum was bred by Waterers Nursery in Bagshot, Surrey prior to 1850

The Inkharo Rhododendron was introduced at the 2011 RHS Chelsea Flower Show as a revolutionary lime tolerant rootstock allowing the growing of Rhododendrons on neutral clay soils, up to pH7.5. Developed from a Rhododendron growing in a German lime quarry, and introduced after 20 years of breeding and testing.