Hydrangea is a genus of about 70 to 75 species of flowering plants native to south and eastern Asia and North and South America. Most are shrubs growing 1 to 3 meters tall, while some are small trees and others lianas. Ama-cha, meaning sweet tea, is a tisane made from Hydrangea serrat. It is poured over a statue of Buddha in a bathing ceremony and served to people in attendance on April 8, the day thought to be Buddha's birthday.
Each piece is cast in bronze from a mold created from samples of the actual plants. Each piece is hand finished using hand-painted or gold plated finishes.