Root & Grow®, Root stimulator and Plant Starter is new to the market! It is a fertilizer and root stimulator all in one. The difference with this product is the addition of IBA (Indole Butyric Acid) which stimulates root development and reduces transplant shock. We recommend applying Root & Grow every 4 weeks after planting. A little goes a long way—typically the recommendation is to use 3 Tbsp in a gallon of water around the root ball.