Rhododendron Altaclarense
Description: From Highclere Castle. One of the first man-made hybrids. Grows to become a very large tree. Deep red flowers.
Parentage: (catawbiense x ponticum) x arboreum
Ultimate Height: 7.00 meters after 10 years
Flowering Period: This plants flowers in the North Hemisphere around May
Availability: This plant is not available. We are seeking plants of this form. Please contact us if you have it.
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.)