Sequoia is derived from California Redwood. The dye is found in very small quantities in the Cones and is collected during harvest of the seeds used for reforestation.
Use 15% weight of fiber. Extract dye in a warm water bath (140°F, 60°C) for an hour. Filter out wood chips, add your mordanted fiber, and hold the temperature for another hour or two.
Sold in 2 ounce bags.