How to Grow Cannabis Hydroponically

You can grow cannabis hydroponically with a few simple supplies and a little bit of know-how. Follow these tips to get started.

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What is hydroponics?

Hydroponics is a method of growing plants in which the roots are suspended in a water-based nutrient solution. The word “hydroponics” comes from the Greek words “hydro”, meaning water, and “ponics”, meaning labor or work.

Advantages of hydroponics

Hydroponics has many advantages over traditional soil-based gardening. Perhaps the most significant advantage is that it allows growers to produce a higher yield in a shorter amount of time. Hydroponics also uses less water than soil-based gardening, and the lack of soil means that there is less chance of pests and diseases.

Another advantage of hydroponics is that it allows growers to control the nutrient solution that the plants are exposed to. This means that growers can tailor the nutrient solution to the specific needs of their plants, which can lead to healthier plants and larger yields.

Finally, hydroponics systems can be set up almost anywhere, which means that they can be used to produce food in areas where soil-based gardening is not possible, such as in deserts or on rooftops.

How to grow cannabis hydroponically

Hydroponics is a method of growing plants without soil. Instead, the roots are suspended in a solution of water and nutrients. This method can be used to grow a variety of plants, including cannabis. Cannabis is a type of flowering plant that can be used for medical or recreational purposes.

Choose your system

One of the great things about growing hydroponically is that there are many different ways to do it. You can purchase a ready-made system, or you can build your own. You can even grow plants in simple setups like buckets or barrels with a little know-how.

The type of system you choose will depend on a number of factors, including the type of plants you want to grow, the size of your operation, and your budget. Let’s take a look at some of the most popular hydroponic systems for cannabis cultivation.

Ebb and Flow (Flood and Drain)
The ebb and flow system is one of the most popular hydroponic setups for cannabis cultivation. It is a relatively simple system that can be built cheaply and easily; it is also very forgiving, making it a great choice for first-time growers.

In an ebb and flow system, plants are grown in an inert medium such as coco coir, perlite, or vermiculite. A timer controls a pump that floods the grow area with nutrient-rich water; after a set period of time, the pump turns off and the water drains back into a reservoir. The roots of the plants are constantly exposed to oxygen as they dry out between waterings, which helps to prevent root problems such as root rot.

Deep Water Culture (DWC)
Deep water culture (DWC) is one of the simplest and most popular hydroponic setups for cannabis cultivation. In DWC systems, plants are grown in inert mediums such as coco coir or perlite; however, instead of sitting in trays or buckets of nutrient solution, their roots aresuspended directly into the reservoir. An air pump provides oxygen to the roots while they are submerged.

Drip System
Drip systems are one of the most efficient ways to grow plants hydroponically. In a drip system, nutrient solution is delivered directly to the roots of the plants via individual drip emitters. The solution then drips down through the medium and drains back into the reservoir. Drip systems can be either gravity-fed or pressurized; pressurized systems require a pump to deliver nutrients to the drippers while gravity-fed systems rely on gravity to push the solution through the system.

Prepare your grow room

The first step in growing cannabis hydroponically is preparing your grow room. You’ll need to create a space that is dark, quiet, and temperature-controlled. The best way to do this is to convert a closet or small room into your grow room. Start by removing all items from the closet and prepping the space for painting. Once the space is painted, you’ll need to install fluorescent lighting and ventilation. Finally, add a humidity monitor and Thermostat to maintain the ideal growing conditions.

Once your grow room is set up, you’ll need to choose a hydroponic system. There are many different types of hydroponic systems, but the three most common are ebb and flow, drip irrigation, and wick systems. Ebb and flow systems are considered the best option for beginners because they are easy to set up and maintain. Drip irrigation systems are more complex but offer better control over water and nutrients. Wick systems are the simplest option but can be difficult to troubleshoot if problems arise.

Once you’ve chosen a hydroponic system, you’ll need to purchase your supplies. Most hydroponic stores will carry everything you need, including grow lights, reflectors, fans, timers, pumps, tubing, nutrients, and pH testers. Be sure to ask for advice if you’re unsure about any of the products.

With your grow room set up and your supplies on hand, you’re ready to start growing cannabis hydroponically!

Set up your hydroponic system

A hydroponic system can be set up in a variety of ways, but they all have the same basic components. You’ll need a reservoir to hold your nutrient solution, a pump to circulate the solution, and a growing medium for your plants. There are many different types of hydroponic systems, but we’ll focus on two of the most common: ebb and flow and drip.

Ebb and flow systems are also called flood and drain systems. They work by flooding the grow area with nutrient solution and then draining it back into the reservoir. This process is repeated at regular intervals, typically every few hours.

Drip systems are the most common type of hydroponic system. They work by delivering nutrient solution to the roots of your plants through a network of drip emitters or drip lines. Drip systems can be either continuous or intermittent. Continuous drip systems deliver nutrient solution to your plants 24 hours a day, while intermittent systems deliver solution on a schedule, typically every few hours.

Plant your cannabis seeds

To grow cannabis hydroponically, you will need to start with planting your cannabis seeds. You can either purchase seeds from a dispensary or grow your own. If you choose to grow your own, you will need to be extra careful as cannabis seeds are very delicate.

Once you have your seeds, you will need to soak them in water for 24 hours. This will help them germinate and start growing. After 24 hours, you will need to transfer the seeds to a growing medium. Some people use rockwool, while others use coco coir.

Once the seeds have been transferred to the growing medium, you will need to add water and nutrients. The water should be at a pH of 6.0 in order for the plant to absorb the nutrients properly. The nutrients can be purchased from a grow shop or online retailer.

You will need to keep an eye on the temperature and humidity of your grow room as both can affect the growth of your plants. The ideal temperature is between 68-77 degrees Fahrenheit and the ideal humidity is between 40-60%.

As your plants start to grow, you will need to change the water and nutrients every week. You will also need to monitor the pH level of the water to make sure it is still at 6.0.

It is important to note that cannabis plants grown hydroponically tend to be more susceptible to mold and mildew than plants grown in soil. This is because there is more moisture in the air when growing hydroponically. As such, it is important to make sure that your grow room has good ventilation in order to prevent mold and mildew from taking over your plants

Monitor your plants

To successfully grow cannabis hydroponically, you will need to carefully monitor your plants and make sure they are getting the nutrients they need. You can do this by using a soil test kit or a digital pH and nutrient meter.

You will also need to keep an eye on the water level in your reservoir and make sure it does not get too low. Add more water as needed, but be sure to avoid overwatering your plants.

Finally, you will need to monitor the humidity and temperature in your grow room and adjust the ventilation as needed to keep your plants healthy.


There are a few things that can go wrong when you are growing cannabis hydroponically. The most common problems are pH imbalances, nutrient deficiencies, and temperature fluctuations. If you are having problems with your plants, check to see if any of these issues are the cause.

Common problems

There are a few common problems that can occur when growing cannabis hydroponically. These include:

1. Nutrient deficiencies: This is the most common problem when growing cannabis hydroponically. nutrient deficiencies can lead to stunted growth, yellow leaves, and slow growth. If you think your plants are nutrient deficient, you can flush the system with clean water to remove any build-up of nutrients and then start adding them back in at the correct levels.

2. pH imbalances: pH imbalances can also lead to problems with cannabis growth. If the pH is too high or too low, it can prevent plants from being able to absorb nutrients properly. This can lead to deficiencies and poor growth. To fix a pH imbalance, you will need to test the pH of your water and then adjust it accordingly using pH up or down products.

3. Temperature fluctuations: Rapid temperature fluctuations can stress out cannabis plants and cause problems with growth. To avoid this, try to maintain a consistent temperature in your grow room or tent using a heater or air conditioner if necessary.

4. Lighting problems: Cannabis plants need a lot of light to grow well, so if your grow room isn’t getting enough light, it could be causing problems with weed growth. Make sure to use high-quality grow lights and position them close to your plants so they can get plenty of light.


If you are having problems with your hydroponic cannabis grow, here are some potential solutions:

– Check your pH and adjust as needed. The ideal pH range for cannabis is between 6 and 7.
– Make sure your grow room has adequate ventilation. Cannabis plants need a lot of fresh air to stay healthy.
– Inspect your plants for signs of pests or diseases and treat accordingly.
– Make sure your nutrient solution is well-balanced and that you are changing it out every 2 weeks or as needed.
– Check your water quality. If you are using tap water, it may contain chlorine or other chemicals that can harm your plants. Try using filtered or distilled water instead.
– Don’t let your plants get too big! If they become too large, they will be more difficult to manage and may not produce as much bud. Be sure to prune them as needed to keep them under control.

Following these tips should help you solve any problems you are having with your hydroponic cannabis grow.

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