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Heavy Duty 72-Cell Pack Square Plug Flat Insert
Heavy Duty Square Cell Pack These reuseable cell packs can last for many seasons of growing. Made of heavy duty polystyrene ...
$2.69
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Heavy Duty Cut Kit Tray, 21.3″L x 11.0″W x 2.8″H
Also known as a flat, the cut kit tray is ideal for seed and cutting propagation. Combined with our mesh ...
$3.31
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Heavy Duty Extension Cord, 240V, 12′
Get connected! This extension cord extends your reach—freeing you up from inconvenient outlets placed around your grow room or work ...
$26.65
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Heavy Duty Tomato Barrel w/Tower
The Tomato Barrel planting system provides both a planting container and built-in staking for plant support. It provides lightweight, strong ...
$33.94
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Herculean Harvest, 1 gal
Hercules was known for his strength and power: a perfect name for a product that gives your plants just that. Herculean ...
$26.73
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Herculean Harvest, 1 qt
Hercules was known for his strength and power: a perfect name for a product that gives your plants just that. Herculean ...
$9.71
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Herculean Harvest, 2.5 gal
Hercules was known for his strength and power: a perfect name for a product that gives your plants just that. Herculean ...
$54.82
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Herculean Harvest, 5 gal
Hercules was known for his strength and power: a perfect name for a product that gives your plants just that. Herculean ...
$90.33
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Herculean Harvest, 55 gal drum
Hercules was known for his strength and power: a perfect name for a product that gives your plants just that. ...
$875.86
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HM Digital Replacement pH Sensor Probe for HM-500
HM-500 Replacement pH probe2 Meter / 80 inch cable lengthIncludes pH storage solution, 6-month warranty
$41.52
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HM Digital 1000 ppm TDS Calibration Solution, 3 oz (90 ml)
NaCl calibration solution 1000 ppm comes in lightweight HDPE plastic bottles. Sealed with a coated foam liner.
$7.88
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HM Digital COM-80 EC/TDS/Temp Waterproof Hydro Tester
The COM-80 is an economically priced, reliable EC/TDS meter that is ideal for testing applications such as hydroponics & ...
$32.70
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HM Digital HydroMaster Portable/Wall Mount/Bench Continuous pH/EC/TDS/Temp
HydroMaster Digital testers make monitoring water easier than ever by reading the levels that matter most and providing accurate readings ...
$248.02
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HM Digital Hydromaster Replacement EC/TDS Probe
The HM Digital Hydromaster EC/TDS Probe is a replacement part for the HydroMaster HM-500.
$34.60
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HM Digital PH-80 pH/Temperature Meter
The PH-80 is an economically priced, reliable pH meter that is ideal for testing applications such as hydroponics & gardening, ...
$32.21
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HM Digital PH-STOR pH Electrode Storage Solution
For use with HM Digital's PH-200 and PH-80 (as well as other brands of pH meters). Always make sure your ...
$7.02
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HM Digital TDS-3 Handheld TDS meter
Ideal for commercial use, the TDS-3 includes a carrying case with belt clip. It is highly efficent and accurate due ...
$30.22
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Hormex Liquid Concentrate, 1 gal
Hormex is a vitamin, hormone concentrate and root growth stimulant, and has been a household name amongst the horticultural community ...
$96.92
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Hormex Liquid Concentrate, 1 qt
Hormex is a vitamin, hormone concentrate and root growth stimulant, and has been a household name amongst the horticultural community ...
$32.30
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Hormex Liquid Concentrate, 16 oz
Size: 16 oz
$20.18
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Hormex Liquid Concentrate, 8 oz
Size: 8 oz
$13.28
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Hormex Rooting Powder #1, 0.75 oz, Carded Bottle
Hormex Rooting Powdered rooting compound is economical and effective. The fastest way to start new plants from cuttings. Encourages quick ...
$7.47
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Hormex Rooting Powder No. 3, 1 lb
Hormex Rooting Powders Clone plants from cuttings, including fruits and vegetables, faster and healthier than ever before. Hormexs’ famous Snip N ...
$43.39
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Hormex Rooting Powder No. 8, 1 lb
Hormex Rooting Powders Clone plants from cuttings, including fruits and vegetables, faster and healthier than ever before. Hormexs’ famous Snip N ...
$57.97
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Hormex Snip n’ Dip #8, 0.75 oz, Carded Bottle
Hormex Rooting Powder #8 is a vitamin and hormone concentrate as well as a root-growth stimulant. Hormex prevents transplant shock ...
$14.45
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House & Garden 1-Component, 200 L
House & Garden 1-Component The 1-Component Soil Base nutrient is a mineral nutrition for soils that are amended with lime or ...
$447.22
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House & Garden Algen Extract, 1 L
House & Garden Algen Extract A premium Norwegian Sea Kelp blend derived by way of cold press which helps preserve its ...
$74.76
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House & Garden Algen Extract, 20 L
House & Garden Algen Extract A premium Norwegian Sea Kelp blend derived by way of cold press which helps preserve its ...
$878.18