Rhododendron ferrugineum
Alpenrose
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Alpenrose (Rhododendron ferrugineum) - Description
Rhododendron ferrugineum (sometimes called alpenrose, snow-rose, or rusty-leaved alpenrose) is an evergreen shrub that grows just above the tree line in the Alps, Pyrenees, Jura and northern Apennines, on acid soils. It may grow up to 1 m tall and produces clusters of pinkish-red, bell-shaped flowers throughout the summer. The undersides of the leaves are covered in rust-brown spots, which give the species its scientific name.
Alpenrose (Rhododendron ferrugineum) - Blooming
Blooms in early Spring. There are many varieties of Rhododendrons and Azaleas that come in many different colors and styles.
Alpenrose (Rhododendron ferrugineum) - Growth
Rhododendrons do best with filtered sunlight. Generally, these plants will need more protection from the sun as the climate gets sunnier and hotter. They do best in cooler, temperate climates that have sufficient rainfall.
Alpenrose (Rhododendron ferrugineum) - Planting
Sow seeds in soil that is acidic as soon as the seeds are ripe or in early spring. Maintain the temperature between 55 and 65°F (18°C). It should be noted that Rhododendrons readily hybridize and seeds collected from your garden may produce offspring that do not closely resemble the parents.
Alpenrose (Rhododendron ferrugineum) - Pest
Prone to whitefly, lace bugs, scale, caterpillars and aphids. Susceptible to powdery mildew, leafy gall and root rot.
Alpenrose (Rhododendron ferrugineum) - Interesting facts
The name Rhododendron literally translates to "rose tree". The species R. catawbiense is found throughout the Appalachian Mountains. Not only is it the state flower of West Virginia, it is also on the state flag.
Alpenrose (Rhododendron ferrugineum) - Soil and irrigation
Need fast-draining soils that are rich and acidic. Does best if the soil also retains sufficient quantities of water (amend soil with organic matter to do so). These plants need more air in the root zone than most plants do. Plants that are yellowing and that have leaves that are dropping are most likely sitting in water and the roots are drowning.
