|One of the most popular types are Azaleas, but the species, varieties, and hybrids number in the thousands. Rhododendrons can be evergreen or deciduous, and they vary from under 2 feet up to 80 feet in height. Generally found in clustered bouquets, they come in a variety of shapes -- funnel to bell-shaped, small and large. They range from the whitest of whites to cream yellows and from flaming oranges to fiery reds and the deepest of purples. When you buy plants, you may see a 2- or 3-number American Rhododendron Society code on the sticker. The 2-number codes indicate flower quality, then shrub quality, with 5 as highest and 1 as poor. Plant in acid soils. Mulch to protect shallow roots, but never cultivate the soil there. Protect from wind, salt spray and afternoon sun in hot climates. Watch out for root weevils and wilt diseases. Proper location and care will help reduce problems.
The chartreuse flowers that cover this very compact growing dwarf make it an unusual rock garden or border plant.
Attributes - Rhododendron 'Shamrock'
Plant Type: Shrub
Bloom Season: Mid Spring through Late Spring
Flower Color: Yellow
Height: 1 ft. to 1 ft. 6 in.
Width: 1 ft. 6 in.
Sunlight: Partial Sun, Shade
Climate: Zones 6, 7, 8, 9, 10
Notes: Thrives in Acid Soil. Container Plants, Showy Flowers. Susceptible to Beetles, Black Spot, Damping-off, Root Rot, Scales, Spider Mites, Whiteflies.
Rhododendron 'Anna Rose Whitney', Rhododendron 'Blue Diamond', Rhododendron 'Bob's Blue', Rhododendron x 'Chionoides', Rhododendron 'Cynthia', Rhododendron 'Elizabeth', Rhododendron 'Furnival's Daughter', Rhododendron 'Homebush', Rhododendron 'Jock', Rhododendron 'Lee's Dark Purple', Rhododendron 'Lem's Cameo', Rhododendron 'Loder's White', Rhododendron 'Mother of Pearl', Rhododendron 'Noyo Chief', Rhododendron 'Pink Pearl', Rhododendron 'Purple Gem', Rhododendron x 'Scintillation', Rhododendron arboreum arboreum, Rhododendron x fragrantissimum, Rhododendron insigne, Rhododendron simsii