Products

The meter makes measuring pH quick and easy! This lightweight, waterproof tester offers high accuracy pH, low range EC/TDS (0 to 3999 µS/cm EC/ 0 ...

This modern Hanna GroLine Waterproof EC/TDS meter is only 0.7" thick and extremely ergonomic, fitting comfortably in your hand. The meter has a ve...

This modern Hanna GroLine Waterproof pH/temperature meter is only 0.7" thick and extremely ergonomic, fitting comfortably in your hand. The meter ...

The Trim Bin by Harvest-More makes trim work more enjoyable and more efficient. This two-part system allows for versatility and efficient use of sp...

The HM Digital COM-80 Hydrotester is easily the most advanced economically priced, reliable EC/TDS meter on the market. With its versatility and d...

The PH-80 has proven to be the most reliable pH meter in its price range. It has become a favorite in such applications as hydroponics & garde...

Crystal Burst (0-15-15) is one of the most potent liquid PK Boosts on the market. It has a healthy dose of Vitamin B1 to help relieve stress caused...

Made from worm castings and the highest quality potent seabird and bat guanos. Highly concentrated and all natural – over 2 years spent sourcing a...

Humboldt County's Own Snow Storm Ultra is a potassium supplement which assists with essential oil production. If you like Purple Maxx, but color is...

It's Spanish for green!! Lush green colors and vigorous growth are what you can expect with Humboldt Nutrients Verde. Used as a foliar spray or as ...

Designed for use with ordinary construction vapor barrier to seal off work zones, this adhesive-backed zipper is perfect for creating a simple, res...

Mammoth P Microbes is an organically derived microbial inoculant for growing plants that maximizes phosphorus and micronutrient cycling to maximize...

The Measure Master scales can be used for a variety of different purposes, including the precise measuring of fertilizers and dry nutrients. Meas...

The Measure Master's Garden Syringes are great for measuring nutrients, supplements and pesticides. These syringes are a clean and accurate alter...

All-purpose Measure Master Graduated Containers feature easy-to-read US oz and metric mm graduations. Positioned right on the container is our si...

General purpose measuring shot glass. Graduation measurements include teaspoon, tablespoon, ounces and milliliters. Clear glass for easy and accur...

These Pipettes, unlike their glass counterparts, will not shatter or break. Measure Master's Sterile Pipettes should be used only once so that th...

Heavy duty, oilless (water cooled) multipurpose pump suitable for water control: basement/indoor flooding, plant watering, water recirculation and ...

Liquid concentrate fertilizer that supports lush vegetative growth. Designed to enhance plant size and structure, allowing for more abundant fruit...

Spinosad is an organic compound produced by fermentation that kills pests feeding on treated plant material. Sunlight and soil microbes break it do...