One Gallon of Concentrate. MaterAid is specially formulated to increase the number, the size and the taste of your tomatoes. Tomatoes are different from other plants and to reach their full potential they need a diet of nutrients specifically tailored to their needs. That is why MaterAid contains the tomato required elements of Magnesium, for improved flowering and fruit quality, Calcium for stronger roots, healthier leaves and firmer tomatoes, and Sulfur for protein and increased chlorophyll. MaterAid also has North Atlantic kelp for micronutrients and plant growth promoting enzymes along with humic substances for increased nutrient absorption. MaterAid is the easiest and most economical way to grow the best tomatoes possible right in your own backyard. Mix 1-2 ounces of liquid MaterAid concentrate with 1 gallon of water and apply to your tomato plant roots every other week until tomato fruit is set on your plant, then increase the feedings to once week. MaterAid can be used on other plants and vegetable with amazing results, but it is formulated to be the proper mix of nutrients, micro-nutrients and plant beneficial substances to grow the best tomatoes possible. *Grow the largest fullest flavored tomatoes possible *Easy to use, just mix with water and apply every few days through growing season. *Contains Nitrogen, Phosphorous Potassium along tomato required Magnesium, Calcium Sulfur. *North Atlantic Kelp (Ascophyllum Nodosum) Low Molecular Weigh Humic for maximum growth. *Economical- Highly Concentrated Formula, one ounce makes a gallon of fertilizer.