Growing Cannabis With Hydroponics: Beginner's Guide

Discover the secrets of growing cannabis with hydroponics in our beginner's guide, covering setup, maintenance, and tips for maximizing yields.

Growing Cannabis With Hydroponics: Beginner's Guide

Growing cannabis with hydroponics has become increasingly popular among young adults looking to cultivate their own plants. This advanced method of growing offers numerous benefits over traditional soil-based cultivation, including faster growth and higher yields. In this blog post, we'll provide an in-depth look at the world of hydroponic growing and equip you with all the knowledge needed to cultivate cannabis using this advanced method.

We'll look into the various hydroponic systems available, how to construct one for yourself, and keeping a healthy environment for your cannabis plants. Additionally, we'll discuss troubleshooting common issues that may arise during the process and share tips on maximizing yields using various techniques specific to hydroponic cultivation.

Finally, we'll weigh the advantages and disadvantages of growing cannabis with hydroponics compared to traditional soil methods so that you can make an informed decision about which approach best suits your needs as a cultivator.

Table of Contents:

What is Hydroponic Growing?

Hydroponic growing is a method of cultivating plants, including cannabis, without the use of soil. Instead, plants are grown in an inert medium like coco coir or perlite and receive their nutrients through water-soluble solutions. This innovative approach to gardening offers several advantages over traditional soil-based methods.

The Science Behind Hydroponics

A plant's roots are straightly exposed to nutrient-laden aqueous solutions, giving them all the necessary components for growth and development. This direct access allows for more efficient nutrient uptake compared to soil-grown plants which must rely on root exploration and absorption from surrounding areas.

This increased efficiency leads to faster growth rates and higher yields as plants can focus their energy on producing flowers rather than searching for nutrients in the soil. Additionally, hydroponically grown cannabis often exhibits better flavor profiles due to its ability to absorb specific minerals more effectively.

A Cleaner Growing Environment

  • No Soil: By eliminating the need for soil, hydroponic systems reduce common issues associated with traditional cultivation such as pests and diseases caused by harmful microorganisms found in dirt.
  • Fewer Pesticides: With fewer pests present in a controlled environment like a hydroponics system, there's less need for chemical pesticides that could potentially harm your cannabis or affect its taste profile.
  • Better Water Conservation: Since most hydroponic setups recirculate water within closed-loop systems, they generally consume less water than conventional gardens while still providing optimal hydration levels required by your cannabis plants.

Customizable Nutrient Solutions

One of the key advantages of hydroponic growing is the ability to tailor nutrient solutions specifically for cannabis plants. By adjusting the concentration and balance of essential minerals, growers can optimize their plants' growth rates, yields, and overall health. This level of control allows for experimentation with different cannabis-specific nutrients, enabling you to fine-tune your grow setup for maximum results.

With hydroponics, cannabis can be cultivated in a more controlled environment with higher yields than traditional soil-based growing methods. Investigating various hydroponic arrangements can help you decide on the most appropriate one for your cultivation needs and desires.

Types of Hydroponic Systems

When cultivating cannabis through hydroponics, a range of systems can be utilized that accommodate varied requirements and inclinations. Before settling on the right system for your cannabis grow, it's important to gain an understanding of each hydroponic option and its associated advantages. In this section, we'll explore some popular hydroponic systems for cannabis cultivation.

Deep Water Culture (DWC)

Deep Water Culture, or DWC, is a straightforward and cost-effective method of hydroponics where plant roots are submerged in a nutrient-rich water solution. This technique allows plants to receive oxygen through air stones placed at the bottom of the reservoir while absorbing nutrients directly from the water. DWC is an excellent choice for beginners due to its simplicity and low maintenance requirements.

Nutrient Film Technique (NFT)

The Nutrient Film Technique, or NFT, involves circulating a thin film of nutrient-rich water over plant roots suspended in channels or tubes without any growing medium. The constant flow ensures that plants have access to all necessary nutrients while excess moisture evaporates quickly, preventing root rot issues. NFT requires more precise control over nutrient levels but can lead to faster growth rates compared to other methods.


In Aeroponic systems, plant roots hang freely in an enclosed chamber where they're periodically misted with a fine spray of nutrient solution instead of being submerged in water. This method allows for excellent oxygenation and nutrient absorption, promoting rapid growth and high yields. Yet, aeroponics can be complicated to establish and sustain due to the need for exact timing of spray cycles.

Ebb and Flow (Flood and Drain)

Ebb and Flow, also known as Flood and Drain, is a hydroponic system where plants are placed in trays filled with an inert growing medium like perlite or coco coir. The trays are periodically flooded with nutrient solution before draining back into a reservoir below. This process ensures that plant roots receive both nutrients and oxygen while minimizing the risk of overwatering or root rot issues.

Drip Irrigation

In Drip Irrigation systems, individual drippers deliver a controlled amount of nutrient solution directly to each plant's root zone through tubes connected to a central reservoir. This technique allows for efficient use of water resources while providing plants with consistent access to nutrients without oversaturating their roots.

Now that you're familiar with some popular hydroponic systems available for cannabis cultivation, it's time to choose one based on your grow space requirements, budget constraints, level of expertise, or personal preferences.

Setting Up a Hydroponic System

Creating the perfect hydroponic system for your cannabis plants is essential to achieve optimal growth and yields. To begin, we'll take you through the process of constructing a hydroponic system to meet your cannabis plants' needs.

  1. Selecting Your Hydroponic System: As mentioned earlier, there are various types of hydroponic systems available such as Deep Water Culture (DWC), Nutrient Film Technique (NFT), and Aeroponics. Choose the hydroponic system that best meets your requirements based on factors such as space availability, budget and desired yield. For beginners, DWC is often recommended due to its simplicity.
  2. Gathering Necessary Equipment: Once you have chosen your preferred hydroponic system type, gather all necessary equipment including grow lights, air pumps or water pumps depending on the system type (learn more about choosing the right pump here), reservoirs for nutrient solutions, timers for light cycles and other automation tools if needed.
  3. Preparing The Grow Space: Ensure that your grow space has proper ventilation and temperature control measures in place. Cleanliness is a must for hydroponic systems; thus, it's important to sterilize all areas before installing the equipment.
  4. Mixing Nutrients And Adjusting pH Levels: Follow manufacturer guidelines while mixing nutrients with water to create an ideal solution for cannabis plants' growth stages. It's important to maintain appropriate pH levels (5.5 to 6.5) in your nutrient solution, as this will ensure proper absorption of nutrients by the plants.
  5. Transplanting Your Cannabis Plants: If you're starting with clones or seedlings, gently transplant them into your hydroponic system using appropriate growing mediums like coco coir, rockwool cubes or clay pebbles. Be cautious not to damage the roots during transplantation.
  6. Maintaining And Monitoring The System: Regularly check and adjust pH levels, monitor water temperature (ideally between 65-70°F), and keep an eye on nutrient concentrations in the reservoirs. It's also essential to clean and maintain equipment such as pumps and filters for optimal performance.

Incorporating these steps while setting up a hydroponic system will help create an ideal environment for cannabis growth that leads to higher yields compared to traditional soil-based methods.

Maintaining a Healthy Grow

Keeping your hydroponic cannabis grow healthy is essential for achieving maximum yields and potent buds. This article will provide advice for ensuring your hydroponic cannabis plants remain in optimal condition, including tips on keeping pH levels balanced and avoiding nutrient deficiencies.

Monitoring pH Levels

Maintaining a precise pH balance in your hydroponic system is essential for ensuring that your plants can effectively absorb the necessary nutrients. For optimal growth, cannabis prefers a slightly acidic pH range between 5.5 and 6.5. To maintain this optimal range, it's important to test the water using pH testing kits or meters regularly. If necessary, adjust the pH by adding appropriate solutions such as phosphoric acid (to lower) or potassium hydroxide (to raise).

Nutrient Management

In hydroponics, providing adequate nutrients directly to plant roots is vital for their growth and development. Follow these steps to ensure proper nutrient management:

  1. Selecting high-quality nutrients: Invest in reputable brands that offer complete nutrient solutions specifically designed for cannabis cultivation.
  2. Frequent monitoring: Regularly check the concentration of nutrients in your reservoir using an EC (electrical conductivity) meter or TDS (total dissolved solids) pen.
  3. Avoid overfeeding: Overfeeding can lead to toxicities; always follow recommended dosages provided by manufacturers.
  4. Maintain cleanliness: Clean reservoirs frequently to prevent buildup of salts and other contaminants that may harm plant health.

Air Circulation & Temperature Control

Proper air circulation and temperature control are essential for maintaining a healthy hydroponic grow. Implement the following measures to ensure optimal conditions:

  • Use oscillating fans: These help maintain consistent airflow, reducing the risk of mold and mildew while strengthening plant stems.
  • Maintain ideal temperatures: Cannabis plants thrive in temperatures between 70-85°F (21-29°C) during the day and 60-75°F (15-24°C) at night.
  • Control humidity levels: Aim for relative humidity around 40%-60% during vegetative growth, lowering it to 35%-45% during flowering to prevent bud rot.

Pest & Disease Prevention

Cannabis plants grown hydroponically can still be susceptible to pests and diseases. To minimize these risks, follow these preventative measures:

  1. Maintain cleanliness: Keep your grow area clean by regularly removing dead leaves or debris that may harbor pests or pathogens.
  2. Incorporate beneficial insects: Introduce predators like ladybugs or predatory mites into your grow space as a natural means of pest control.
  3. Avoid overwatering: Excess moisture can lead to root rot; monitor water levels closely in your system, ensuring roots receive adequate oxygenation without being submerged constantly.

Having a healthy crop is fundamental to producing top-notch cannabis, and getting the basics of hydroponic growing right can be paramount in guaranteeing success. Troubleshooting common issues quickly and efficiently will be key to maintaining an optimal environment for your plants.

Troubleshooting Common Issues

Hydroponic cultivation can present its own unique obstacles. In this section, we'll discuss some common issues that may arise during your hydroponic cannabis grow and provide advice on how to troubleshoot them effectively.

Nutrient Deficiencies

One of the most frequent issues in hydroponics is a lack of necessary nutrients for plants to grow optimally. Insufficient nutrient supply can cause deficiencies, leading to poor growth in hydroponic plants. To prevent nutrient deficiencies:

  • Ensure you're using a high-quality hydroponic nutrient solution specifically designed for cannabis cultivation.
  • Maintain the recommended pH levels for maximum nutrient absorption by your plants.
  • Monitor your plants vigilantly for any signs of nutrient deficiency, such as yellowing leaves or stunted growth, and adjust the feeding schedule to rectify it.

pH Imbalances

A healthy pH level is crucial for maintaining an ideal environment in which your cannabis plants can thrive. An imbalance in pH levels can lead to poor plant health and decreased yields due to reduced nutrient availability. Here's what you should do if you suspect a pH issue:

  1. Determine the problem: Regularly test the pH level of both water/nutrient solution input and output (runoff). If there's a significant difference between these two values, it could indicate a buildup of salts or other imbalances within the root zone.
  2. Adjust accordingly: If your pH is too high or too low, use pH adjusters to bring it back within the ideal range (5.5-6.5). Be sure to make gradual adjustments and monitor the results closely.
  3. Flush if necessary: In some cases, a thorough flushing of your hydroponic system with clean water may be required to reset nutrient levels and correct any imbalances.

Pests and Diseases

In hydroponics, pests and diseases can spread quickly due to the absence of soil as a natural barrier. To prevent these issues from affecting your cannabis plants:

  • Maintain a clean grow environment by regularly sanitizing all equipment and surfaces.
  • Monitor for signs of pest infestations or disease symptoms such as discolored leaves, wilting, or mold growth.
  • If you do encounter pests or diseases in your grow room, take immediate action using appropriate treatments like organic pesticides or fungicides..

Troubleshooting common issues is a necessary step to ensure that your hydroponic cannabis grows are successful. By taking the time to identify and address any potential problems, you can maximize yields with hydroponics.

Maximizing Yields with Hydroponics

Growing cannabis using a hydroponic system offers numerous advantages, including the potential for higher yields. To make the most of your hydroponic setup and maximize your harvest, consider implementing these strategies:

  1. Choose the right strain: Some cannabis strains are better suited to hydroponic growing than others. Research different strains and select one that is known for thriving in a soilless environment.
  2. Maintain optimal conditions: Regularly monitor factors such as pH levels, nutrient concentrations, temperature, humidity, and light exposure to ensure they remain within ideal ranges. This will help promote vigorous growth and prevent issues like nutrient deficiencies or pests.
  3. Prune strategically: Proper pruning can encourage more bud production by directing energy towards flowering sites rather than unnecessary foliage. Remove lower branches that receive little light or compete with main colas for resources. Additionally, techniques like topping or low-stress training (LST) can create an even canopy for better light distribution.
  4. Increase lighting intensity: Cannabis plants require ample amounts of high-quality light to produce dense buds packed with cannabinoids. Invest in powerful LED grow lights or high-pressure sodium (HPS) lamps designed specifically for cannabis cultivation. Be sure to maintain proper distance between the lights and plant canopy to avoid heat stress.
  5. Carefully manage nutrients: Fine-tune your feeding schedule and nutrient concentrations to meet the specific needs of your cannabis plants throughout their growth stages. Overfeeding can lead to nutrient lockout, while underfeeding may result in stunted growth or reduced yields.
  6. Optimize harvest time: Harvesting your buds at the right moment is crucial for maximizing potency and yield. Pay close attention to trichome development, as this will help you determine when it's time to cut down your plants. Waiting too long or harvesting too early can negatively impact cannabinoid levels and overall bud quality.

By implementing these strategies, you'll be well on your way to achieving impressive hydroponic cannabis yields that rival those of experienced growers. Remember that practice makes perfect - so don't be discouraged if your first few attempts aren't quite what you hoped for. With dedication and persistence, you'll soon master the art of hydroponic growing.

Advantages and Disadvantages of Hydroponics

When it comes to growing cannabis, hydroponic systems offer a unique set of advantages and disadvantages compared to traditional soil-based methods. By considering the advantages and disadvantages of hydroponic systems, you can decide if they are right for your cannabis cultivation needs.

Advantages of Hydroponic Growing

  • Faster Growth: With precise control over nutrients and water, plants grown in hydroponic systems tend to grow faster than those in soil. This means shorter vegetative cycles and quicker harvest times.
  • Higher Yields: Due to the optimized nutrient delivery, plants grown with hydroponics often produce higher yields than their soil-grown counterparts. Check out this comparison between hydroponic and soil yields.
  • Better Control Over Nutrients: In a hydroponic system, you have complete control over the nutrients your plants receive, allowing for fine-tuning of their diet based on specific needs or stages of growth.
  • No Soil-Borne Pests or Diseases: By eliminating soil from the equation, you also remove many common pests and diseases that can harm your cannabis plants.
  • Eco-Friendly Option: Hydroponics uses less water than traditional gardening methods due to its recirculating nature. Additionally, there's no need for harmful pesticides since most pests are eliminated by not using soil.

Disadvantages of Hydroponic Growing

  • Critical Maintenance Required: Hydroponic systems require constant monitoring and maintenance of nutrient levels, pH balance, and water temperature. This intensive monitoring can be a challenge, and not all gardeners may have the time or inclination to do it.
  • Higher Initial Costs: Setting up a hydroponic system can be more expensive than traditional soil-based growing methods due to the need for specialized equipment such as pumps, reservoirs, and grow mediums. However, this investment often pays off in the long run with higher yields.
  • Limited Mobility: Hydroponic setups are generally less mobile than potted plants grown in soil since they rely on complex plumbing systems that can't easily be moved or rearranged.
  • Risk of System Failure: In case of power outages or pump failures, your plants could suffer from lack of nutrients or oxygen leading to potential crop loss. It's essential to have backup plans in place for these situations.

Weighing the advantages and disadvantages is crucial when deciding whether hydroponics is right for you. If you're willing to invest time into learning about this method and maintaining your system properly, it has the potential to yield impressive results.

Frequently Asked Questions Growing Cannabis With Hydroponics

Is growing cannabis hydroponically better than traditional?

Yes, hydroponic growing is generally considered better for cannabis cultivation compared to traditional soil-based methods. Hydroponics allows for greater control over nutrient delivery and environmental conditions, leading to faster growth rates, higher yields, and potentially superior quality.

Does hydroponics increase yield cannabis?

Absolutely. Hydroponic systems can significantly increase cannabis yields due to the precise control of nutrients and environmental factors. This results in healthier plants with more vigorous growth patterns that ultimately produce larger harvests compared to those grown in soil.

Is hydroponic better than soil for cannabis quality?

In many cases, yes. Hydroponically-grown cannabis often has a higher potency and improved taste profile compared to its soil-grown counterparts. The ability to carefully manage nutrient levels within a hydro system contributes greatly towards producing high-quality buds with enhanced flavor profiles.

How much cannabis does hydroponic yield?

The amount of harvested material varies depending on factors such as strain type, grower experience level, lighting conditions, plant density per square meter (sqm), among others; however it's common for well-managed indoor setups using efficient techniques like Sea Of Green (SOG), or Screen Of Green (SCROG), growers can achieve up 500-600 grams/sqm or even more when optimized properly.


Hydroponic growing is a great way to maximize yields and speed up the growth of cannabis. Thoroughly planning, monitoring and troubleshooting your hydroponic system can ensure a perfect environment for cultivating cannabis with this method. Although there are some drawbacks to using this method compared to traditional soil-based methods, it still remains one of the most popular ways for growers to get large harvests in a short amount of time.