Planters Pride RZS0175 50-Count Square Fiber Grow Strip Refill Great for refilling our Fiber Grow Pot Greenhouse Kit and other Planters' Pride window sill grower kits This refill has been designed for starting seeds, or cuttings Once your plants have matured enough the seeding and cutting along with the pot can be planted directly into the ground or a planter This prevents root disruption and transplant shock Has a higher resistance to mold growth than peat