Marijuana Growing Supplies

Are you looking for the best marijuana growing supplies? You have come to the right place! Hydroponic growing is more popular than ever before. There are several reasons for this phenomenon. First, gardeners are becoming aware of the many benefits of using hydroponics instead of soil-based growing. Increased yield, the speed of production, and the quality of crops are just a few notable advantages. Secondly, there are more hydroponic options on the market than ever before. These products improve by the day. Lastly, the desire to grow marijuana is stronger than ever, thanks in part to legalization and societies’ changing attitudes towards cannabis. Marijuana growing has become a popular gateway to the world of hydroponics.

While it is certainly possible to grow cannabis outdoors and in a soil-based medium, indoor hydroponic weed is a popular choice for hobbyists. This option is more discreet and less reliant on the whims of Mother Nature. Indoor marijuana growing conditions are tightly controlled by the grower to ensure they remain optimal. This gives hydroponics an edge over soil-based cannabis cultivation.

If you are new to hydroponic cannabis, the most common question is, “which marijuana growing supplies are needed to get started?” We have searched for the most essential marijuana growing supplies, tools, products, and equipment and listed some of the best options here.

Hydroponic Systems for Growing Marijuana

The first consideration on your marijuana growing supplies checklist is choosing a hydroponic system. Hydroponic cannabis can be grown using a variety of techniques, including Ebb and Flow, Deep Water Culture (DWC), Drip, Nutrient Film Technique (NFT), and aeroponics. There is no correct system to use, so you are free to choose the hydroponic system which suits your growing environment and time limitations.

While some cannabis growers construct their own DIY hydroponic systems, the easiest option is to purchase a hydroponics kit. We compare a variety of different hydroponic systems and kits in our “Hydroponic Weed System” page. This page includes a variety of the best hydroponic systems for growing marijuana, so be sure to read this before choosing your other marijuana growing supplies. Here are a couple examples from the page:

General Hydroponics WaterFarm Complete Hydroponics Kit

  • Complete drip system kit
  • Includes grow media and nutrients
  • Only one module
  • Expandable if you wish to add more modules
  • Popular with marijuana growing novices
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General Hydroponics Rainforest 66 Aeroponic System

  • Complete Aeroponics System kit
  • Including:
    • Vortex Sprayer
    • Grow Media
    • and Nutrients
  • Great for growing all sizes of cannabis plants
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Best Grow Mediums for Growing Marijuana

Hydroponics uses soilless grow media to suspend roots of cannabis plants. Cannabis grow mediums act to support the plants and to keep roots oxygenated and hydrated. These mediums are inert and do not possess any form of nutrients. They act only to suspend roots as nutrient solution floods the grow bed.

The most popular grow mediums for marijuana include clay pebbles (also referred to as LECA and Hydroton), coco coir, rockwool, oasis cubes, perlite, and vermiculite, to name a few. Each media has slightly different properties, but most function just as effectively for cannabis as for other types of plants. See our Hydroponics Growing Medium page for more information. Note that – if you purchase a marijuana growing system – grow media may be included with the kit. Here are a few examples of mediums you may consider using for growing weed:

GROW!T Clay Pebbles

  • 100% natural, pre-washed clay
  • Pebbles have a strong structure
  • Freely draining,
  • Does not retain excess water
  • Provides beneficial oxygen levels
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General Hydroponics CocoTek Bale Coco Growing Media

  • Three types of compressed coco coir
  • Low in sodium
  • Made from coconut pith and fibers only
  • Great aeration and draining properties
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Nutrients for Growing Marijuana

In hydroponics, nutrients are mixed with water, forming the nutrient solution. This nutrient-rich water is essential for the health and hydration of the cannabis plant’s roots. The main nutrients in plant fertilizers are nitrogen (N), phosphorous (P), and potassium (K), and are labeled according to the values of these three key elements. For example, a fertilizer labeled 2-1-6 means that there are 2-parts nitrogen, 1-part phosphorus, and 6-parts potassium. Nitrogen is especially important during the vegetative, foliage stage of the plant, whereas phosphorous and potassium are more essential to the flowering stage.

See our Best Nutrients for Hydroponics page for more information.

Optimal N-P-K Values for Growing Marijuana

Stage of Growth Nitrogen (N) Phosphorous (P) Potassium (K)
Vegetative High Medium High
Flowering Low Medium to High High

Most marijuana fertilizers contain other nutrients besides N-P-K. These including calcium, magnesium, sulfur, as well as the important micronutrients of zinc, iron, manganese, molybdenum, chlorine, cobalt, silicon, boron, and copper.  While organic nutrient solutions are natural and tend to produce fragrant weed, most hydroponic marijuana growers prefer synthetic (chemical) fertilizers. Why? Synthetic nutrients make cannabis grow faster, increase the potency of marijuana buds, and they are less prone to clog-up your hydroponic system. With that said, here are a few of the most popular nutrient solutions for growing hydroponic marijuana (including an organic option):

General Hydroponics Flora Grow, Bloom, Micro Combo

  • Primary, secondary and micronutrients for:
    • increased marijuana yields
    • better quality crops
  • pH-balanced
  • Adjusted mixtures
    • to conform to cannabis plant’s needs
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FoxFarm Big Bloom, Grow Big & Tiger Bloom Nutrient Trio Hydro Formula

  • 3 formulations for different stages of cannabis growth
  • High-quality fertilizer
  • Popular brand with hydroponic marijuana growers
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General Hydroponics General Organics Go Box

  • Popular organic nutrients from General Hydroponics
  • Go Box includes:
    • 16 oz. BioThrive Grow
    • 16 oz. Bloom fertilizers
    • 6 (8 oz) samples GO liquid supplements
  • A top choice for organic marijuana growers
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Marijuana Grow Lights

During the vegetative stage of growth, cannabis growers should provide lots of light to their plants (14 up to 24 hours of light). During the blooming stage, we recommend alternating between 12 hours of light and 12 hours of darkness. There are very few locations which provide this amount of natural sunlight. Therefore, grow lights are a necessary component of your marijuana growing supplies shopping list.

Choosing the best grow lights for marijuana is a difficult task. There are many great options on the market these days. LED (light-emitting diode) lights are a top choice for cannabis cultivators because they produce quality cannabis, high yields, electrical efficiency (i.e., cheaper per wattage vs other lighting choices), and do not overheat. Besides LED lighting, cannabis growers may opt for fluorescent lighting (including CFL and T5 lights), or High-Intensity Discharge (HID) (including Metal Halide (MH), High-Pressure Sodium (HPS), Ceramic Metal Halide (CMH), and Light Emitting Ceramic (LEC) lighting). While each type of grow light has its strengths, LED lighting – or a combination of LED and HID – is the most popular choice for weed growers.

We created a comprehensive list of the best LED grow lights for your consideration. See our “Best LED Grow Lights” page for reviews and ratings of each light. Here is one example from our page:

Advanced Platinum Series P300 300w 12-band LED Grow

  • highest PAR/LUMEN output per watt of any LED light
  • 12-band full spectrum
  • 5-year manufacturer’s warranty
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Timers for Marijuana Grow Lights

Grow light timers are often overlooked on marijuana growing supplies checklists. Nobody wants to flip a switch every time a grow light needs to be turned on or off. Fortunately, grow light timers can do this work for you. Just program the timer for the specific times you want lights to switch on/off, then go about your day without worrying about this aspect of growing cannabis.

Hydrofarm Dual Outlet 7-Day Grounded Digital Programmable Timer

  • On/Off increments of 1 minute
    • up to 8 cycles per day
  •  15A/1725W, UL-listed
  •  Simultaneously controls two outlets
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Climate Control and Ventilation for Growing Marijuana


When growing marijuana indoors, proper temperature and air flow are crucial for achieving maximum yields. Typically, an optimal range for cannabis is somewhere between 68-77 degrees (20-25 Celsius).  Anything higher than this range will speed the metabolism of the plants and requires higher inputs of water, carbon dioxide, nutrients, and lighting. Consider adding a thermostat to your marijuana growing supplies (if you don’t already have one).

Humidity Gauge (electric hygrometers)

Cannabis plants perform best when humidity levels are somewhere between 40-70%.  Optimal humidity levels are higher at beginning stages of growth and lower as the cannabis approaches harvest. Low humidity causes transpiration (plants use water at a higher rate). On the other hand, keeping humidity too high runs the risk of fungus. Thus, adhering to the cannabis humidity guidelines is recommended. Electric hygrometers are a good choice for marijuana growers because they give precise readings of humidity in the growing environment.

Ideal Humidity Range

Clones Vegetative Flowering Final Weeks Before Harvest
70-80% 40-70% 40-50% Less than 40%

ThermoPro TP50 Hygrometer Thermometer

  • Thermo-hygrometer for measuring humidity and temperature
  • Readings in Fahrenheit or Celsius
  • Displays high and low temps and humidity records
  • 1 AAA battery included
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Carbon Dioxide for Growing Marijuana

Carbon dioxide (CO2) is essential for the photosynthesis process of cannabis growing. Without it, cannabis risks not growing at all. When plants are cultivated outdoors, nature provides a CO2 reserve of 300-500 ppm. However, this level fluctuates indoors and should be monitored.  Raising CO2 levels to 1000-1500 ppm can greatly increase marijuana yields. Thus, marijuana growers often supplement their growing spaces with CO2 tanks and emitters.

TIM10 CO2 Meter w/ Temperature and Relative Humidity

  • Accurately and continuously measures:
    • CO2, temperature, and relative humidity
  • Measures:
    • CO2 from 0-10,000ppm
    • Temperature from 0-120F
    • RH from 20-99.9%
  • Self-calibrating and no movable parts
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Hydroponics (Co2) Regulator Emitter System with Solenoid Valve

  • CO2 emitter speeds yields and growth rates by up to 40%
  • 110V, 5-meter-long plastic tubing
  • High-quality brass construction
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Cyl-Tec CO2 Tank – 20 lbs.

  • Ships empty and ready to fill
  • Rust-proof, High-quality 6061-T6 brushed aluminum tank
  • 1800 PSI service pressure, certified to use in USA and Canada
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CO2Meter Day Night CO2 Monitor and Controller

  • Day/night controller to set min and max CO2 levels
  • Light sensor automatically shuts off the CO2 when it becomes dark
  • Cables and hardware included for easy installation
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Flora Hydroponics 20lb CO2 Tank & CO2 Regulator Kit

  • Empty 20 lbs. storage tank, tubing, and regulator kit
  • For grow rooms under 10’ x 10’
  • All-in-1 kit for CO2 enrichment
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Cannabis growers use ventilation and exhaust systems to move oxygen and CO2 within their growing space. Solutions can be as simple as osculating fans, while more serious venting utilizes inline fans and ducting. Speed controls can also be used to regulate airflow.

Hydrofarm Active Air Wall Mount Fan

  • 3 speeds, oscillates 90 degrees
  • 55-watts, 120-volts, w/ a 6-ft power cord
  • Easy wall mounting
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VIVOSUN 4” 203 CFM Duct Inline Fan with Variable Speed Controller

  • Includes 4″ inline fan:
    • Mounting bracket
    • Variable speed controller
    • Leather sheath
    • Operating Manual
  • A fan speed of 2500 rpm, 110V/60HZ
  • 68W of power, a current of 0.62A and noise level of 49 dB
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Active Air 6-Inch 400 CFM Inline Fan

  • Durable ceramic coating
  • UL-recognized components
  • Runs quietly
  • Includes:
    • 8-foot pre-wired 120V cord
    • Mounting brackets
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TerraBloom Inline Fan Duct Booster for Exhaust and Intake Ventilation

  • Brings fresh air into grow rooms (intake)
  • or use as an exhaust fan for smaller grow spaces
  • Airflow of 240 CFM, 37W, 120V/110V, 2600 RPM
  • 1-year warranty
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VenTech Aluminum Duct for Ventilation Ducting, 6”

  • 6’ x 25’; made of strong aluminum
  • Good for grow room venting and cooling
  • High quality aluminum stays cool to the touch
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VenTech Speed Controller for Duct and Inline Fans

  • Varies the speed of an electric motor
  • 3-way rocker switch with low, medium or high settings
  • Works with any universal AC/DC brush-type motor
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Marijuana Odor Control

Exhaust fans help with removing odors in the growing area. However, they may not be adequate enough to eliminate the strong, skunky odor of cannabis in the rest of your home. Luckily, there is a solution to this common problem. Carbon binding filters are devices which effectively sucks in air, runs it through carbon filtration, and then releases odorless air back into the room.  This also decreases heat and mold spores in the cannabis grow area. Many hydroponic weed home growers consider carbon filters a must-have item on their marijuana growing supplies checklist.

iPower Air Carbon Filter

  • Removes odors and promotes clean air
  • 1050+ IAV Australia charcoal
  • Includes reversible flange and pre-filter
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Marijuana Grow Tents

Grow tents are a sensible addition to anyone’s marijuana growing supplies. These enclosed areas are great for keeping everything you need in a contained space. Temperature and humidity can be more adequately controlled, and grow lights work at a more efficient state. This is because grow tents are comprised of reflective materials (mylar lining) so the light hits cannabis plants from all sides. Most grow tents are made of thick, durable fabric, heavy-duty metal framing and have vents for easy access and air flow. Many models have fixtures for hanging grow lights within the tent.