Four Seasons Grow 530 Bulk - 1 YD LOOSEGrow 530 is a lightly charged soil blend that includes worm castings and a small amount of dry fertilizer to support plant growth for 1 2 weeks prior to additional feeding and fertilization, afterward you can begin to apply your fertilizer system with a strong root zone already in place. We recommend this blend for outdoor use, and it does not contain coco or peat moss. Grow 530 is an excellent media for growers looking to feed shortly after