Fertilome Start And Grow Plant Food Lasts About Three To Four Months. May be used on indoor and outdoor plants, containers or in-ground. Best used when planting bedding plants and baskets. May be used to feed established plants like roses. May be used as a slow release fertilizer on new or established lawns. Contains slow time-release nitrogen. I use this at planting time with my baskets plus I feed them with Blooming & Rooting Water Soluble fertilizer throughout the summer. 19-6-12 formula. 1 lb.