Grevillea Robusta, or more commonly know as Silkoak, is a tree with green foliage and yellow flowers of the genus Grevillea. It has a rapid growth rate and a height of 105 feet at maturity. Its duration is perennial which means it will grow year after year. It's active growth period is spring summer fall, blooms during summer and is intolerant of shade. Grevillea Robusta or Silkoak's floral region is North America US Lower 48, Hawaii and Puerto Rico, specifically in the states of Florida and Hawaii.
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