Rhododendron gelbe Bltter was bedeutet das ? This is called guttation. It occurs when there is excess pressure in the root system. At night, stomata close and transpiration stops. But roots keep absorbing water. The pressure builds until the Olivenbaum berwintern: Darauf solltest du achten OBI Rhododendron 'Gartendirektor Glocker' The Arboretum and Botanical Garden, University of Bergen, Norway