Rhododendrons are not native to Africa or South America. Rhododendrons have been called the King of Shrubs for various reasons, but most likely, because of the species with luxuriant evergreen foliage and flower forms that rival those of any plant species. Pruning Rhododendron Rhododendron canadense (L.) Britton, Sterns & Poggenb. b+='namesofflowers.net' Bloom alert - Rhododendron aurigeranum, anoth. Chlorosis is treated by spraying the leaves with a chelated iron fertilizing product, and also by applying it to the soil near the plant. Although the notched leaves are not attractive, the weevils usually do not cause severe damage to the plant. Plant collectors have been collecting rhododendron species for over a century from all over the world. Tropical rhododendrons occur in southeast Asia and the north of Australia. An … Lacebugs are tiny insects, about a 1/8" with clear lace-like wings. //-->. Black Vine Weevil Most are evergreen but some are deciduous. With a round form and dark green leaves, it is very attractive, especially when the foliage turns almost purplish in color in the autumn. datasets have provided data to the NBN Atlas for this species.. Browse the list of datasets and find organisations you can join if you are interested in participating in a survey for species like Rhododendron … Lacebugs Rhododendrons come in many varieties, of many different sizes, colors and flower types. Rhododendron is a genus of 500 to 900 species and includes both of what we commonly call rhododendrons and azaleas. There are two subspecies of Rhododendron ponticum, subsp. species Rhododendron mariesii Name Synonyms Azalea mariesii (Hemsl. Cascade azalea. New growth is maroon. a='