1 Gallon

Our 1-gallon liquid fertilizers are perfect for growers who want fast-acting, easy-to-use nutrition with professional-level results. Whether you’re boosting growth, improving flowering, stabilizing pH, or strengthening plant structure, this collection has you covered.

Armor Kote Potassium Silicate helps reinforce plant cell walls for stronger stems. Bio Cozyme supports healthier growth and recovery. Bloom (0-5-4), Grow (2-1-6), Jump Start, and Mendocino Hawaiian Big Bud provide targeted nutrition for every stage. Humic Acid improves nutrient uptake, while Mendocino Cal-Mag keeps plants balanced and healthy.

You’ll also find pH Up and pH Down options for dialing in optimal growing conditions. These gallon sizes are great for greenhouses, hydroponic growers, and anyone needing dependable performance with the convenience of liquid feeding. Stock may vary, and many are on sale, so it’s a great time to grab what you need.