Neptune’s Harvest Fish Fertilizer (2-4-1) – Organic Liquid Plant Fertilizer – Fish Hydrolysate for Vegetables, Flowers, Fruit, Trees, Grass – Indoor and Outdoor Plant Food (Quart). How to Use: Simple and efficient across growing spaces, this liquid plant food requires only one ounce per gallon of water and works as a soil drench or foliar feed; ideal as an indoor plant fertilizer and for outdoor gardens, trees, lawns, and vegetables, this liquid fish fertilizer acts as a natural sticker and spreader, helping nutrients adhere better to plant surfaces for effective absorption.