How to plant the幸福树, timing and methods of planting. (Note: "幸福树" is translated as "happy tree" or could be a specific type of plant, such as "Ficus Lyrata" which is sometimes referred to as a "happy tree". If it is a proper noun for a specific type of plant, it might be better to keep it as "X Fortune Tree" where "X" is the actual name of the plant.)
Soil acidification can revitalize rhododendrons. "Soil Acidification Aids in Revitalizing Rhododendrons"