Price: $14.97
(as of Jul 22, 2026 08:08:55 UTC – Details)
From the brand
Simple Feeding, Better Gardens
Clear directions and consistent quality, no guesswork.
Trusted by Gardeners
Trusted by gardeners for over 10 years. Professional-grade plant nutrition, simple and consistent, from indoor plants to outdoor gardens.
Starter Kit & Essentials
Plant Food & Growth
Plant Care & Protection
Soil & Water Care
Outdoor Essentials
How did we get our start?
Humboldts Secret was created by gardeners, for gardeners, with a simple goal, make high-quality plant nutrients affordable and easy to use, so more people can grow with confidence.
What makes our products unique?
Humboldts Secret products are made with carefully selected ingredients and manufactured in our California facility, for consistent quality you can count on.
What problem are we solving?
We make plant nutrition simpler, clearer, and easier to follow, so gardeners can spend less time guessing and more time growing.
FOR ANY PLANT: Our Golden Tree formula is an all-in-one additive for any plant, tree, flower or bush. When used with a well-balanced fertilizer, Golden Tree helps improve soil/foliar nutrient conditions for better crop yields. In addition to improving overall plant nutrition, Golden Tree supports conditions for better plant establishment, nutrient uptake and abiotic stress tolerance.
GROW METHOD COMPATIBLE: No matter what grow method you’re using, Humboldts Secret Golden Tree solution will help feed growing plants. It’s designed to be compatible in all mediums – hydroponics, aeroponics, coco, DWC, soil, and every other type of growing method.
ESSENTIAL NUTRIENTS: Golden Tree can help provide essential nutrients to your garden that it isn’t getting now. Our formula contains a mixture of kelp, carbs and minerals. It can be used in conjunction with other additives and fertilizers or as the only additive.
SMALL & STRONG: Our 2-ounce solution makes up to 55 gallons of an easy-to-use additive solution to feed your plants. This is a professional-quality fertilizer that can transform any home and garden and give anyone a green thumb!
Reviews
There are no reviews yet.