Your Bio Planting Block will last a lifetime with these handy, economical Bio Sponges. When you're ready to begin a new crop in the Planting Block, first be sure that the block has been thoroughly disinfected (warm water with a splash of bleach is fine). Then soak 18 of the Bio Sponges in warm water for a few minutes. They expand, revealing the pre-drilled planting hole at one end. Simply slip one seed into the hole of each Bio Sponge, place the Sponge seed-side-up in the cell of the Planting Block, and you're on your way to another bumper crop of healthy, strong, super-quick seedlings.
Bio Sponges are comprised of a combination of coconut coir, peat moss, and bio char and are now enriched with oilseed extract, giving your seedlings an extra boost of nutrition. You'll love the results!
These giant sponges are replacements for Park's Original Bio Dome with 18 Whopper Cells, the largest of the Bio Dome family of seed starting systems. The Whopper Dome is great for larger seeds and rooted cuttings. It is also ideal for seedlings that need to be grown to a larger size in the Dome before being transplanted to their permanent location.
In this refill pack you get 36 sponges, enough to fill the Whopper Dome twice.
