General Hydroponics

General Hydroponics

At General Hydroponics, growing is at the heart of who we are and everything we do. We live it and breathe it.We’re not just helping along an entire movement of like-minded difference makers, rule breakers, and boundary pushers — we’re leading it.

As industry pioneers with more than 45 years in the game, you could say we’re one of the OGs of hydroponics. We’ve come a long way from our humble origins as a scrappy garage-based startup to becoming the leading name in high-impact growing solutions on a global scale. But the philosophy, development, and innovative spirit at the heart of our products is anything but old school.

In stock
10 days
HGC726821
CaMg+® is the ideal supplement to provide a natural source of calcium and magnesium, critical elements in a plant's growth cycle. CaMg+® is biologically catalyzed from oyster shell, dolomite lime and natural plant extracts. Through the use of organic compounds, CaMg+® increases calcium and magnesium transport into the plants. This optimizes plant metabolism, enhancing growth and creating healthier flowers and fruits.
$9548
In stock
10 days
HGC726823
CaMg+® is the ideal supplement to provide a natural source of calcium and magnesium, critical elements in a plant's growth cycle. CaMg+® is biologically catalyzed from oyster shell, dolomite lime and natural plant extracts. Through the use of organic compounds, CaMg+® increases calcium and magnesium transport into the plants. This optimizes plant metabolism, enhancing growth and creating healthier flowers and fruits.
$19500
In stock
10 days
HGC726822
CaMg+® is the ideal supplement to provide a natural source of calcium and magnesium, critical elements in a plant's growth cycle. CaMg+® is biologically catalyzed from oyster shell, dolomite lime and natural plant extracts. Through the use of organic compounds, CaMg+® increases calcium and magnesium transport into the plants. This optimizes plant metabolism, enhancing growth and creating healthier flowers and fruits.
$4195
In stock
10 days
HGC726820
CaMg+® is the ideal supplement to provide a natural source of calcium and magnesium, critical elements in a plant's growth cycle. CaMg+® is biologically catalyzed from oyster shell, dolomite lime and natural plant extracts. Through the use of organic compounds, CaMg+® increases calcium and magnesium transport into the plants. This optimizes plant metabolism, enhancing growth and creating healthier flowers and fruits.
$1324
Out of stock
10 days
HGC726842
Diamond Black is derived from 100% pure mined Leonardite, a naturally occurring form of carbon drawn from prehistoric peat bogs. Containing an exceptionally high percentage of plant-active humates, Diamond Black supports beneficial microbial activity in soils and increases micronutrient availability. Diamond Black can be added to all kinds of garden soils and potting mixes and used with a wide variety of plants during all phases of growth.
$4329
In stock
10 days
HGC732535
KoolBloom® is a highly concentrated nutrient supplement that promotes abundant flowering and facilitates ripening in annual flowers and herbs. KoolBloom® is rich with phosphorus and potassium and contains precise amounts of ripening elements. KoolBloom® is to be used only at the very end of a plant's life cycle and will help build larger, heavier fruits and flowers.
$13806
In stock
10 days
HGC732531
KoolBloom® is a highly concentrated nutrient supplement that promotes abundant flowering and facilitates ripening in annual flowers and herbs. KoolBloom® is rich with phosphorus and potassium and contains precise amounts of ripening elements. KoolBloom® is to be used only at the very end of a plant's life cycle and will help build larger, heavier fruits and flowers.
$2115
In stock
10 days
HGC732542
Liquid KoolBloom® is a bulking agent that goes way beyond other bloom boosters. Enriched with stress-reducing vitamins and nutrient-transporting acids, it promotes heavy production of essential oils, fantastic flavors and increases fruiting and flower development. Liquid KoolBloom® should be used at the start of the reproductive cycle, initiating larger, heavier fruits and flowers. During the last two weeks, use Dry KoolBloom® for an additional bloom boost and to facilitate ripening.
$47566
In stock
10 days
HGC732539
Liquid KoolBloom® is a bulking agent that goes way beyond other bloom boosters. Enriched with stress-reducing vitamins and nutrient-transporting acids, it promotes heavy production of essential oils, fantastic flavors and increases fruiting and flower development. Liquid KoolBloom® should be used at the start of the reproductive cycle, initiating larger, heavier fruits and flowers. During the last two weeks, use Dry KoolBloom® for an additional bloom boost and to facilitate ripening.
$10277
In stock
10 days
HGC732544
Liquid KoolBloom® is a bulking agent that goes way beyond other bloom boosters. Enriched with stress-reducing vitamins and nutrient-transporting acids, it promotes heavy production of essential oils, fantastic flavors and increases fruiting and flower development. Liquid KoolBloom® should be used at the start of the reproductive cycle, initiating larger, heavier fruits and flowers. During the last two weeks, use Dry KoolBloom® for an additional bloom boost and to facilitate ripening.
$7,34482
In stock
10 days
HGC732543
Liquid KoolBloom® is a bulking agent that goes way beyond other bloom boosters. Enriched with stress-reducing vitamins and nutrient-transporting acids, it promotes heavy production of essential oils, fantastic flavors and increases fruiting and flower development. Liquid KoolBloom® should be used at the start of the reproductive cycle, initiating larger, heavier fruits and flowers. During the last two weeks, use Dry KoolBloom® for an additional bloom boost and to facilitate ripening.
$1,72890
In stock
10 days
HGC732541
Liquid KoolBloom® is a bulking agent that goes way beyond other bloom boosters. Enriched with stress-reducing vitamins and nutrient-transporting acids, it promotes heavy production of essential oils, fantastic flavors and increases fruiting and flower development. Liquid KoolBloom® should be used at the start of the reproductive cycle, initiating larger, heavier fruits and flowers. During the last two weeks, use Dry KoolBloom® for an additional bloom boost and to facilitate ripening.
$20996
In stock
10 days
HGC732538
Liquid KoolBloom® is a bulking agent that goes way beyond other bloom boosters. Enriched with stress-reducing vitamins and nutrient-transporting acids, it promotes heavy production of essential oils, fantastic flavors and increases fruiting and flower development. Liquid KoolBloom® should be used at the start of the reproductive cycle, initiating larger, heavier fruits and flowers. During the last two weeks, use Dry KoolBloom® for an additional bloom boost and to facilitate ripening.
$4796
In stock
10 days
HGC732537
Liquid KoolBloom® is a bulking agent that goes way beyond other bloom boosters. Enriched with stress-reducing vitamins and nutrient-transporting acids, it promotes heavy production of essential oils, fantastic flavors and increases fruiting and flower development. Liquid KoolBloom® should be used at the start of the reproductive cycle, initiating larger, heavier fruits and flowers. During the last two weeks, use Dry KoolBloom® for an additional bloom boost and to facilitate ripening.
$1649
In stock
10 days
HGC718290
MaxiGro™ and MaxiBloom™ are extremely potent, stand-alone, water-soluble, dry concentrate nutrients. Complete in primary, secondary and micronutrients, pH buffered MaxiGro™ and MaxiBloom™ will provide superior results when used with a wide variety of crops in both hydroponic and soil-based environments. MaxiGro™ is for the reproductive stage in fast growing annuals. MaxiBloom™ encourages prolific flowering and fruiting and increases yields and crop quality.
$7701
In stock
10 days
HGC718281
MaxiGro™ and MaxiBloom™ are extremely potent, stand-alone, water-soluble, dry concentrate nutrients. Complete in primary, secondary and micronutrients, pH buffered MaxiGro™ and MaxiBloom™ will provide superior results when used with a wide variety of crops in both hydroponic and soil-based environments. MaxiGro™ is for the reproductive stage in fast growing annuals. MaxiBloom™ encourages prolific flowering and fruiting and increases yields and crop quality.
$1164
In stock
10 days
HGC718295
MaxiGro™ and MaxiBloom™ are extremely potent, stand-alone, water-soluble, dry concentrate nutrients. Complete in primary, secondary and micronutrients, pH buffered MaxiGro™ and MaxiBloom™ will provide superior results when used with a wide variety of crops in both hydroponic and soil-based environments. MaxiGro™ is for the reproductive stage in fast growing annuals. MaxiBloom™ encourages prolific flowering and fruiting and increases yields and crop quality.
$21606
In stock
10 days
HGC718310
MaxiGro™ and MaxiBloom™ are extremely potent, stand-alone, water-soluble, dry concentrate nutrients. Complete in primary, secondary and micronutrients, pH buffered MaxiGro™ and MaxiBloom™ will provide superior results when used with a wide variety of crops in both hydroponic and soil-based environments. MaxiGro™ encourages growth of seedlings, cuttings and stimulates rapid growth through the vegetative growth stage.
$7701
Out of stock
10 days
HGC718301
MaxiGro™ and MaxiBloom™ are extremely potent, stand-alone, water-soluble, dry concentrate nutrients. Complete in primary, secondary and micronutrients, pH buffered MaxiGro™ and MaxiBloom™ will provide superior results when used with a wide variety of crops in both hydroponic and soil-based environments. MaxiGro™ encourages growth of seedlings, cuttings and stimulates rapid growth through the vegetative growth stage.
$1164
In stock
10 days
HGC718315
MaxiGro™ and MaxiBloom™ are extremely potent, stand-alone, water-soluble, dry concentrate nutrients. Complete in primary, secondary and micronutrients, pH buffered MaxiGro™ and MaxiBloom™ will provide superior results when used with a wide variety of crops in both hydroponic and soil-based environments. MaxiGro™ encourages growth of seedlings, cuttings and stimulates rapid growth through the vegetative growth stage.
$21606
In stock
10 days
HGC722080
General Hydroponics pH Control Kit contains 8 oz pH UP, 8 oz pH DOWN, 1 oz indicator and vial.
$1238
In stock
10 days
HGC722115
The acid formulation uses phosphoric acid to lower the pH to the proper level.
$611
In stock
10 days
HGC722125
The acid formulation uses phosphoric acid to lower the pH to the proper level.
$2123
In stock
10 days
HGC722120
The acid formulation uses phosphoric acid to lower the pH to the proper level.
$853
In stock
10 days
HGC722140
General Hydroponics pH Test Kits make pH testing easy. Simply fill a test-tube halfway with nutrient, add a few drops of pH Test Indicator and observe the coloration of the liquid in the test vial. Many experienced growers prefer our pH Test Kit to expensive electronic meters because of its reliability and ease of use, which are important factors when the health of a valuable crop is at stake. Use 3 drops per 5ml of solution.
$790
Out of stock
10 days
HGC722145
General Hydroponics pH Test Kits make pH testing easy. Simply fill a test-tube halfway with nutrient, add a few drops of pH Test Indicator and observe the coloration of the liquid in the test vial. Many experienced growers prefer our pH Test Kit to expensive electronic meters because of its reliability and ease of use, which are important factors when the health of a valuable crop is at stake. Use 3 drops per 5ml of solution.
$717
In stock
10 days
HGC722085
This Base solution is formulated using potassium hydroxide and potassium carbonate. Add a little at a time when your nutrient pH is too low in order to raise the pH to the proper level.
$611
In stock
10 days
HGC722095
This Base solution is formulated using potassium hydroxide and potassium carbonate. Add a little at a time when your nutrient pH is too low in order to raise the pH to the proper level.
$2123
In stock
10 days
HGC722090
This Base solution is formulated using potassium hydroxide and potassium carbonate. Add a little at a time when your nutrient pH is too low in order to raise the pH to the proper level.
$853
Out of stock
10 days
HGC722069
General Hydroponics Prevasyn Insect Repellant/Insecticide is an insect repellant that makes life miserable for bugs. It features concentrated plant extracts and capsicum oleoresin (pepper extract). The latter ingredient is the keysoft-bodied insects and mites can't stand its irritant properties. When applied regularly, General Hydroponics Prevasyn Insect Repellant/Insecticide keeps bugs from eating or laying eggs on leaves. General Hydroponics Prevasyn Insect Repellant/Insecticide is one of the few insect repellants on the market that has both concentrated plant extracts and capsicum oleoresin. Make it part of your strategy for managing bug problems.
$726
Out of stock
10 days
HGC722070
General Hydroponics Prevasyn Insect Repellant/Insecticide is an insect repellant that makes life miserable for bugs. It features concentrated plant extracts and capsicum oleoresin (pepper extract). The latter ingredient is the keysoft-bodied insects and mites can't stand its irritant properties. When applied regularly, General Hydroponics Prevasyn Insect Repellant/Insecticide keeps bugs from eating or laying eggs on leaves. General Hydroponics Prevasyn Insect Repellant/Insecticide is one of the few insect repellants on the market that has both concentrated plant extracts and capsicum oleoresin. Make it part of your strategy for managing bug problems.
$2336
Out of stock
10 days
HGC722071
General Hydroponics Prevasyn Insect Repellant/Insecticide is an insect repellant that makes life miserable for bugs. It features concentrated plant extracts and capsicum oleoresin (pepper extract). The latter ingredient is the keysoft-bodied insects and mites can't stand its irritant properties. When applied regularly, General Hydroponics Prevasyn Insect Repellant/Insecticide keeps bugs from eating or laying eggs on leaves. General Hydroponics Prevasyn Insect Repellant/Insecticide is one of the few insect repellants on the market that has both concentrated plant extracts and capsicum oleoresin. Make it part of your strategy for managing bug problems.
$4544
In stock
10 days
HGC00007
Desingned for Cooler Climates (CC) the General Hydroponics ProRelease Container Fertilizers are 100% coated granulated fertilizers. Designed for high value crops like cannabis, hemp and other aromatherapeutic herbs grown in containers, raised beds or fabric grow pots. Incorporate or apply at transplant and watch your crops thrive. Feeds for up to 4 months*. *will vary based on soil needs, planting density, climate, crop, media, irrigation or rainfall amount and especially other nutrient usages.*
$9607
In stock
10 days
HGC00005
General Hydroponics ProRelease Field Formula 20-7-20 is a blend of coated and uncoated granulated fertilizers designed for high value field grown crops like hemp and other aromatherapeutic herbs. Apply at the start of your season and watch your crops thrive. Feeds for up to 4 months*. *will vary based on soil needs, planting density, climate, crop, media, irrigation or rainfall amount and especially other nutrient usages.
$4550
In stock
10 days
HGC00009
Desingned for Warmer Climates (WC) the General Hydroponics ProRelease Container Fertilizers are 100% coated granulated fertilizers. Designed for high value crops like cannabis, hemp and other aromatherapeutic herbs grown in containers, raised beds or fabric grow pots. Incorporate or apply at transplant and watch your crops thrive. Feeds for up to 4 months*. *will vary based on soil needs, planting density, climate, crop, media, irrigation or rainfall amount and especially other nutrient usages.*
$9607
In stock
10 days
HGC714140
Rapid Rooter® plugs are all-natural soilless grow plugs made of composted tree bark and organic materials. These plugs are perfect for seedlings or cuttings. Transplant plugs in soil or soilless hydrogardening applications.
$1609
In stock
10 days
HGC714135
Rapid Rooter® plugs are all-natural soilless grow plugs made of composted tree bark and organic materials. These plugs are perfect for seedlings or cuttings. Transplant plugs in soil or soilless hydrogardening applications.
$1190
Out of stock
10 days
HGC714150
Rapid Rooter plugs are all-natural soilless grow plugs made of composted tree bark and organic materials. These plugs are perfect for seedlings or cuttings. Transplant plugs in soil or soilless hydrogardening applications.
$36279
In stock
10 days
HGC726863
RapidStart® is a plant nutrient used to promote root growth while enhancing plant vigor and yield. Strong root networks are linked to larger, more vigorous plants. RapidStart® helps plants develop strong root networks. It can be used throughout the vegetative growth stage and in early flower stage to continue to promote root development.
$78012
In stock
10 days
HGC726862
RapidStart® is a plant nutrient used to promote root growth while enhancing plant vigor and yield. Strong root networks are linked to larger, more vigorous plants. RapidStart® helps plants develop strong root networks. It can be used throughout the vegetative growth stage and in early flower stage to continue to promote root development.
$15,11100
In stock
10 days
HGC726865
RapidStart® is a plant nutrient used to promote root growth while enhancing plant vigor and yield. Strong root networks are linked to larger, more vigorous plants. RapidStart® helps plants develop strong root networks. It can be used throughout the vegetative growth stage and in early flower stage to continue to promote root development.
$11317
Out of stock
10 days
HGC726756
RapidStart is a plant nutrient used to promote root growth while enhancing plant vigor and yield. Strong root networks are linked to larger, more vigorous plants. RapidStart helps plants develop strong root networks. It can be used throughout the vegetative growth stage and in early flower stage to continue to promote root development.
$650
Out of stock
10 days
HGC726850
RapidStart is a plant nutrient used to promote root growth while enhancing plant vigor and yield. Strong root networks are linked to larger, more vigorous plants. RapidStart helps plants develop strong root networks. It can be used throughout the vegetative growth stage and in early flower stage to continue to promote root development.
$2917
In stock
10 days
HGC726856
RapidStart® is a plant nutrient used to promote root growth while enhancing plant vigor and yield. Strong root networks are linked to larger, more vigorous plants. RapidStart® helps plants develop strong root networks. It can be used throughout the vegetative growth stage and in early flower stage to continue to promote root development.
$4,48179
Out of stock
10 days
HGC726855
RapidStart is a plant nutrient used to promote root growth while enhancing plant vigor and yield. Strong root networks are linked to larger, more vigorous plants. RapidStart helps plants develop strong root networks. It can be used throughout the vegetative growth stage and in early flower stage to continue to promote root development.
$4367
In stock
10 days
HGC726860
RapidStart® is a plant nutrient used to promote root growth while enhancing plant vigor and yield. Strong root networks are linked to larger, more vigorous plants. RapidStart® helps plants develop strong root networks. It can be used throughout the vegetative growth stage and in early flower stage to continue to promote root development.
$5884
In stock
10 days
HGC726864
RapidStart® is a plant nutrient used to promote root growth while enhancing plant vigor and yield. Strong root networks are linked to larger, more vigorous plants. RapidStart® helps plants develop strong root networks. It can be used throughout the vegetative growth stage and in early flower stage to continue to promote root development.
$1,86578
In stock
10 days
HGC726861
RapidStart® is a plant nutrient used to promote root growth while enhancing plant vigor and yield. Strong root networks are linked to larger, more vigorous plants. RapidStart® helps plants develop strong root networks. It can be used throughout the vegetative growth stage and in early flower stage to continue to promote root development.
$38746
In stock
10 days
HGC737210
Ripen® 0.5-7-6 promotes increased and abundant flowering with greater oil and fragrance production. Ripen® is highly concentrated and provides macronutrients that are primarily responsible for flower and fruit growth. Ripen® is a liquid nutrient that has been specifically engineered and developed to provide these essential macronutrients in your high value crops life. Use Ripen® during the final one-to-two weeks to promote robust flower and fruit production. Think of Ripen® as an investment in your plants.
$27726
In stock
10 days
HGC737208
Ripen® 0.5-7-6 promotes increased and abundant flowering with greater oil and fragrance production. Ripen® is highly concentrated and provides macronutrients that are primarily responsible for flower and fruit growth. Ripen® is a liquid nutrient that has been specifically engineered and developed to provide these essential macronutrients in your high value crops life. Use Ripen® during the final one-to-two weeks to promote robust flower and fruit production. Think of Ripen® as an investment in your plants.
$6389