About Humboldts Secret Supplies

Humboldts Secret Supplies (HSS) is a U.S.-based manufacturer of premium plant nutrients, serving home gardeners, lawn care enthusiasts, and commercial growers. Our product line includes bestsellers like Everything Indoor Liquid Plant Food, Everything Outdoor Lawn & Garden Fertilizer, All-Purpose Plant Food Powder, and Greenify Lawn Food with Iron & Nitrogen. For more advanced growers, we offer hydroponic and soil solutions such as our Grow & Bloom Base A & B and Golden Tree, a powerful kelp-based additive. In addition to our branded products, we provide full-service private label and custom manufacturing for both liquid and powdered fertilizers. With in-house production, fast turnaround times, and a focus on quality and consistency, HSS is the trusted partner to help your business grow—literally and profitably. Note: To maintain brand integrity and support our retail partners, resale on third-party marketplaces (including Amazon, Walmart, eBay, etc.) is not permitted. We reserve the right to decline orders that do not align with this policy.Read their story