Relationship between Rhododendron Pruning, Cutting Times and The Flower Sprout Formation

Abstract

The end-limit of the pruning time for next year's blossoming worth appreciation was experimentally attested under 1987's meteorological conditions with rhododendrons such as Rhododendron oomurasaki Makino and Rhododendron indicum Sweet. The settling ratio of rhododendron flower sprouts is largely affected by being pruned or not, and if pruned, where and when pruned. It was determined that it has been all right to prune this year's branches by 10 weeks after blossoming (July 28) for R. oomurasaki and 5 weeks (August 11) for R. indicum respectively, to prune last year's branches immediately after the end of blossoming for both species, to prune this year's branches lightly only 10 weeks after blossoming (September 15) for R. indicum, and to heavily prune this and last year's branch mixture by 4 weeks after blossoming (August 4).