Rhododendron
Rhododendron ponticum
Ericaceae · broadleaf evergreen shrub · introduced
Last updated
Data Coverage 3 of 6 dimensions
Quick Facts
Light
Part Shade
Soil
Moist
Water
Moderate
Hardiness
Zone Zones 6a–9b
Diseases (30)
Armillaria ostoyae Armillaria Root Rot Botryosphaeria dothidea Botryosphaeria Dieback Botrytis cinerea Botrytis Petal Blight Botrytis cinerea Botrytis Shoot Blight Seifertia azaleae Bud Blight Rhododendron and Cutting Rots Cylindrocladium scoparium Cylindrocladium Blight and Root Rot Pestalotiopsis sydowiana Gray Blight Non-pathogenic (abiotic stress) Leaf Burn abiotic (drought, heat stress) or bacterial (Xylella fast... Leaf Scorch Symptom category — not a single disease Leaf Spot Exobasidium vaccinii Leaf and Flower Gall Non-pathogenic (iron deficiency) Lime-induced Chlorosis Xylella fastidiosa or abiotic Marginal leaf necrosis Rhododendron necrotic ringspot virus Necrotic Ringspot Ovulinia azaleae Ovulinia Petal Blight Non-pathogenic (physiological disorder) Physiological leaf spot Many different Phytophthora Blight and Dieback Phytophthora spp. Phytophthora Root Rot and Wilt Phytophthora spp. Phytophthora Blight Phytophthora spp. (P Phytophthora Root Rot Podosphaera aphanis var. aphanis Powdery Mildew Phytophthora ramorum Ramorum Leaf Blight Phytophthora ramorum"filthy five\" genera are inc Ramorum Leaf Blight and Shoot Dieback Phytophthora ramorum Ramorum leaf and shoot blight (Sudden oak death) Thekopsora minima and Naohidemyces vaccinii Rust Excess sodium chloride Salt injury Non-pathogenic (abiotic — solar radiation damage) Sunburn Non-pathogenic; genetic/physiological abnormality from ti... Tissue Proliferation Taphrina wiesneri Witches' Broom
Pests (19)
Aphidoidea Aphid Stephanitis spp. Azalea and rhododendron lace bug Acanthococcus azaleae Azalea bark scale Caloptilia azaleella Azalea leafminer Nematus lipovskyi Azalea sawfly Cacoecimorpha pronubana Carnation tortrix Lepidoptera Caterpillars Icerya purchasi Cottony cushion scale Tingidae Lace bug Parthenolecanium spp. Lecanium scale Choristoneura rosaceana Obliquebanded Leafroller Stephanitis rhododendri Rhododendron lace bug Dialeurodes chittendeni Rhododendron whitefly Otiorhynchus spp. Root weevil Tetranychidae Spider mite Nematode, Stunt Root Rot (Phytophthora spp.) Stephanitis pyrioides Azalea Lace Bug Coleotechnites huntella Rhododendron bud moth
Cultivars (1)
'Variegatum'
Common name: Variegated Pontic Rhododendron; Mature height: 4–5 ft