• 888-815-9763 Sales & Support Mon - Fri, 8am - 5pm PST. Instagram Facebook Twitter Google + Youtube


Complete Grow Tent Packages

Complete Grow Tent Packages

Start growing indoors today!

Complete Nutrient Packages

Complete Nutrient Packages

From beginner packages to advanced!

March Nutrients

Fabric Pot Blowout Sale

Gro Pro Fabric Pots on sale now!

Hydrobuilder Learning Center

Expert growing advice and tips!


Nutrients, Fertilizers and Supplements

Learn About Plant Nutrition

Learn about the various types of nutrients, how they work together in your plants, how to read a feeding chart, and the differences between organic and synthetic nutrients.

Learn About Nutrients

Organic Nutrients

Organic Nutrient Packages

Synthetic Nutrients

Synthetic Nutrient Packages

Brands and Supplements

Shop By Brand

Individual Organic Nutrients

Individual Synthetic Nutrients

Micro Nutrients, Supplements & Additives

Hydrobuilder offers the best selection of plant nutrients and fertilizers for every stage of growth and garden type. Find organic and synthetic base nutrients, supplements, foliar sprays, flushing agents and more from top brands like Cultured Solutions, Advanced Nutrients, General Hydroponics and more! Our nutrient packages make it easy to shop for an entire line of products and follow official feeding schedules from each brand. Shop for hydroponic specific nutrients or those optimized for soil and soilless mix gardening including soil amendments, and micro nutrients. Finish your flowers strong with our wide selection of bloom enhancers, sweeteners and flushing agents to enhance product quality, taste and size! Need help choosing a nutrient line for your garden? Just give us a call and our product specialists will find the perfect mix to fit your needs.