Some Secrets Stay Hidden. Ours Grows Like Hell..
We make plant nutrients and pest control products that take the stress and second-guessing out of growing.
Citrus trees in a sunlit yard. Tomatoes climbing a balcony. A stubborn houseplant in the corner window. Wherever something green takes root, Humboldts Secret is there — formulas that turn the ordinary into the extraordinary.
Most nutrient systems read like riddles — overcomplicated or vague, leaving gardeners scratching their heads in frustration. That’s the puzzle Yousef Benhamida set out to fix.
When his own plants refused to thrive, despite following every instruction, he took matters into his own hands — determined to uncover the real rules of growth. He mixed, tested, and stripped the process down to its essentials, chasing the hidden patterns plants truly respond to.
Finally, something clicked. Something so simple yet powerful — the secret system that actually worked. His gardens flourished, friends wanted in, and what began as one gardener’s experiment became a movement.. Now, over one hundred thousand gardeners use Humboldts Secret products in their homes, greenhouses, patios, and gardens across the country.
And Yousef? He’s still leading the company today — still testing, still improving, and still making sure every gardener has what they need to succeed.
Results backed by experience.
Thousands of verified gardeners swear by it — healthier plants, fuller blooms, and bigger yields using Humboldts Secret products.
Simple systems that work together.
No labyrinth of instructions. Just intuitive kits, clear steps, and formulas designed to complement each other. That’s the Humboldts Secret Supplies way.
Safe for every plant, every setup.
Used by bonsai lovers, balcony gardeners, greenhouse gardeners, and everyone in between.
Tested, refined, and made in the USA.
We keep quality close to home, and make sure every batch meets our standards before it reaches your soil. No mystery there.
Great gardeners trust Humboldt Secret Supplies.
What drives us isn’t just making great products. It’s making sure anyone — from the curious beginner to the seasoned gardener — can unlock their garden’s full potential.
