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Humboldts Secret Supplies
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Humboldts Secret Supplies

All Products

30 products
  • 4-1 Soil Meter
    From $18.99
  • Base A & B Bundle
    From $23.97
    World's Best Base Nutrient System
  • CalMag & Iron
    From $11.99
    CalMag & Iron to Correct Common Deficiencies
  • Clip-On LED Grow Light
    From $33.99
  • Everything Growing
    From $23.97
    All Purpose Plant Food and Fertilizer Powder 20-20-20
  • Everything Indoor
    From $11.97
    Instant Liquid Plant Food for All Indoor Plants 3-3-3
  • Everything Kit
    From $49.97
    Complete Care: Includes Everything Indoor, Everything Outdoor, and Everything Growing
  • Everything Outdoor
    From $28.97
    All Purpose Lawn, Plant, Vegetable, Fruit & Tree Food 5-5-5
  • Fabric Grow Bags
    From $15.99
    Premium Non-Woven Fabric Grow Bags
  • Flower Shield
    From $29.98
    Natural Insecticide, Fungicide and Miticide
  • Flower Stacker
    From $17.98
    Flowering Booster to Increase Yields
  • Golden Tree
    From $29.98
    Our Signature All-In-One Additive
  • Greenify 12-0-0 w/ 6% Iron
    From $29.97
  • Grow & Bloom Commercial Powder System Part 1 & 2 (50 Pounds Total)
    From $199.99
    Commercial Growers Powder System
  • Grow Room Glasses w/ Interchangeable Lenses
    From $25.99
  • Hose-End Sprayer 32 oz
    From $24.99
  • Kelp Extract
    From $38.99
  • Monopotassium Phosphate 0-52-34
    From $47.99
  • Nitrile Gloves
    From $16.99
  • PH Down
    From $11.99
    Liquid PH Down Buffering For PH Stability
  • PH Up
    From $10.99
    Liquid PH Up Buffering For PH Stability
  • PH Up & Down Bundle
    From $21.99
    Liquid PH Up and Down for PH Stability
  • Plant Enzymes
    From $34.98
    Highly Concentrated Enzymatic Formula
  • Starter Kit
    From $109.99
    World's Best Indoor & Outdoor Plant Fertilizer and Nutrient System
  • Starter Kit 2
    From $159.99
    World's Best Indoor & Outdoor Plant Fertilizer and Nutrient System
  • Starter Kit 2 XL
    From $434.40
    World's Best Indoor & Outdoor Plant Fertilizer and Nutrient System
  • Starter Kit Commercial
    From $1,499.99
    World's Best Indoor & Outdoor Plant Fertilizer and Nutrient System
  • Sweet & Sticky
    From $17.97
    Carbohydrate and Energy Source for Microbial Life
  • Tree Trunk
    From $16.97
    Product for Plant Strength and Stress Resistance
  • Two Way Humidity Control Pack
    From $16.50
    About our Two-Way Humidity Packs

We are confident that you will be pleased with your product and offer a 6 month 100% satisfaction guarantee.

Refer to our return policy for full terms for the satisfaction guarantee.