Today there are over 100 commercial mazes located in amusement parks throughout Japan. Nugget Ninebark Nugget Ninebark, introduced by SDSU in 1990, is the shrub used in the Maze Garden. Nugget is a dense compact shrub of low to medium size and texture. Its foliage is a deep golden yellow with a hint of bronze on new growth. Nugget is quick to establish.
New growth is a deep golden yellow, turning lime green at maturity.
Mature branches are dark brown with shedding bark. Fall foliage color, lasting several weeks, is a deep bronze externally and yellow internally.