R. Hugh Koster
Description: Upright and spreading with grooved leaves. Mid green leaves. Bright crimson flowers with lighter centres are held in an upright cylindrical firm trusses, .(M.Koster & Son 1915)
Parentage: George Hardy x Doncaster
Ultimate Height: 3.0 meters after 10 years
Flowering Period: This plants flowers in the North Hemisphere around May-June
Availability: YES this is a stocked item
Hardiness
UK Zone
4RHS Zone
H (Fully Hardy)EGF Zone
H2US Zone
7AMin Temp
-18°C (0°F)Hardy in all but the coldest parts of Pacific Northwest and UK, France and northern Italy, around Bergen (Norway) and mildest parts of NE USA such as Cape Cod and parts of Long Island. (Please note.)