Rockin' Out With Rhododendrons Sunnyside Nursery Rhododendron simsii azalea classification Olivenbaum dngen: Zeitpunkt & Dngerwahl Plantura Rhododendrons are often thought of as invasive, when in truth the picture is far more complex. Of the more than 1,000 species within the genus, only one, Rhododendron ponticum, is invasive in the UK, Rhamnus alaternus, Stechpalmen Kreuzdorn Saatgut, Samen, Heilpflanzen und Kruter