Effortless outdoor care with a precise, versatile sprayer Meet the Humboldts Secret 2-Pack Garden Hose End Sprayer. Each 32 oz bottle attaches to a standard hose and blends concentrates at a generous 100:1 dilution, delivering consistent output with minimal effort. The integrated K1 head...

Complete Nutrition for Every Plant Humboldts Secret Base A & B is a two-part liquid fertilizer that delivers a full spectrum of essential nutrients to support steady vegetative growth and bold blooms for vegetables, herbs, flowers, and indoor plants. The 1-gallon duo features nitrogen,...

Complete nutrition for every stage Humboldts Secret Base A & B deliver a full-spectrum two-part nutrient system that provides essential elements like nitrogen, phosphorus, potassium, calcium, and magnesium. These premium nutrients aim to support steady vegetative growth, robust leaf color, and bold blooms for...

Complete, easy nutrition for healthier plants Humboldts Secret Base A and Base B form a two-part, fully water-soluble fertilizer designed to support healthy vegetative growth and flowering for a wide range of plants. The formula delivers a complete spectrum of essential nutrients—nitrogen, phosphorus, potassium,...

Boost plant health with Humboldts Secret CalMag & Iron Humboldts Secret CalMag & Iron blends calcium, magnesium, and chelated iron into a balanced nutrient that supports sturdy stems, vibrant leaf color, and steady flowering across a wide range of growing environments. This versatile formula...

Balanced nutrition for thriving plants Humboldts Secret CalMag & Iron delivers calcium, magnesium, and chelated iron to support steady, healthy growth across soil, coco, hydroponics, or RO water. While packaging may vary during our transition, the formula remains the same and performance should stay...

OverviewHumboldts Secret CalMag & Iron is a balanced nutrient supplement designed to deliver calcium, magnesium, and chelated iron across a wide range of growing media. Whether you’re feeding in soil, coco, hydroponics, or RO water, this blend aims to support steady, healthy growth from...

Overview of Humboldts Secret Everything Outdoor Plant Food Meet a versatile liquid fertilizer engineered for outdoor greens. Humboldts Secret Everything Outdoor Plant Food delivers a balanced 5-5-5 NPK ratio in a convenient hose-end spray, making it easy to nurture lawns, vegetables, fruit trees, and...

Unlock fuller blooms with Humboldts Secret Flower StackerHumboldts Secret Flower Stacker is a concentrated bloom booster designed to support flowering across soil, coco, hydroponics, and even aquaponics. Housed in a 32 ounce bottle, it targets the bloom window to help plants form dense buds...

Overview Humboldts Secret Flower Stacker is a concentrated bloom booster crafted for flowering plants grown in soil, coco, hydroponics, or aquaponics. The 0-7-5 formulation targets the bloom window to support bud formation, resin development, and richer color. This product integrates smoothly with Humboldts Secret...

Overview Humboldts Secret Golden Tree is a concentrated liquid plant food designed to elevate plant health from roots to leaves. This all-in-one additive supports nutrient uptake and helps develop stronger stems, contributing to more vibrant, thriving plants whether you grow indoors or outdoors. The...

Unlock bloom and fruit potential with Humboldts Secret MKP 0-52-34 Humboldts Secret Monopotassium Phosphate (MKP) 0-52-34 is a high-purity, water-soluble fertilizer designed to deliver essential phosphorus and potassium when plants need it most. The 0-52-34 ratio provides ample phosphorus to fuel flower development and...

Precision pH balance for thriving grows Humboldts Secret pH Down is a concentrated liquid that helps lower and balance pH in soil, coco, and hydroponic nutrient mixes. By nudging pH into a practical range, it creates favorable conditions for nutrient availability, supporting strong root...

Balance your grow medium with precision Humboldts Secret pH Down is a concentrated phosphoric acid solution designed to lower and stabilize pH in soil, coco coir, and hydroponic systems. When the medium sits in the 5.5–6.5 range, plants often experience more consistent nutrient uptake,...

OverviewMeet the Humboldts Secret pH Up and Down Kit, a liquid pH balancer designed to help growers maintain a stable nutrient environment across soil, coco, and various hydroponic setups. This compact 32-ounce package is built for precision and repeatability, supporting steady development and reliable...

Overview Humboldts Secret Plant Enzymes is a highly concentrated enzymatic blend designed to support root activity and nutrient access across growing mediums. Each milliliter delivers 7,000 active enzyme units, making this one of the stronger enzyme additives available for plant care in hydroponic, soil,...

OverviewThe Humboldts Secret Starter Kit Pack offers a complete plant nutrition system designed to support healthy growth from seedling to harvest. This six‑item kit streamlines feeding into a single routine, ideal for indoor tents, outdoor beds, balconies, and everything in between. Expect a balanced,...

Overview Meet Humboldts Secret Sweet & Sticky, a fast-acting liquid energy boost designed for both indoor and outdoor plants. This carbohydrate and saccharide blend helps energize the root zone and supports metabolic activity during key growth phases, contributing to a sturdy foundation and healthier...

Unlock Energy for plants at every stage Humboldts Secret Sweet & Sticky is a carbohydrate-rich liquid additive designed to energize plants from root to bloom. Packaged in a 32-ounce bottle, its saccharide blend can support healthier nutrient uptake by strengthening the root zone and...

OverviewHumboldts Secret Tree Trunk is a liquid silica additive designed to help plants build stronger cell walls, supporting thicker stalks and sturdier branches. Derived from potassium silicate, this versatile formula works with soil, coco, and hydroponic systems, making it a practical addition to many...