Karen TripletMany people think this is one of the best yellow rhododendrons available. It is very distinct with its two toned, light yellow flowers with darker centers. The foliage is always a rich dark green, and the plant will grow to be a fairly large shrub of 6 8 ft. tall in ten years. Premium Variety This variety has proven itself over time to be a higher grade plant with better performance, a higher degree of attractiveness, and is hard to find and purchase.