Hydroponic Cannabis Seeds

Welcome to our introduction to hydroponic cannabis seeds. This article will go over a brief overview of hydroponic systems. Then we’ll go into cannabis seeds in hydroponics and how we can grow them. If you want to buy hydroponic cannabis seeds, go to the bottom of this article for a link to our starter kits. Let’s jump right in!

Types of Hydroponic Systems

  • Deep Water Culture (DWC)
  • Wick Systems
  • Ebb and Flow

Deep Water Culture (My personal favorite)

hydroponic cannabis seeds

The deep water culture (DWC) system is the most straightforward hydroponic system to get started. As kids, we’ve all put toothpicks into various vegetables, placed them in water, and soon they rooted! As a matter of fact, my kids have avocados they started growing on our window sill right now. So this is basically what DWC hydroponics is.  

I love Deep Water Culture because you don’t need much to get started. Here is a quick list:

  • Bucket to hold water and nutrients
  • Net pots
  • Air pump
  • Airstone
  • Air tubing
  • Grow light
  • Growing medium

Most people have these items hanging around their houses. An old bucket that can hold water is perfect, and lots of people have had fish tanks, so an air pump and tubing are not hard to source either.  

Grow mediums can be anything that can hold a plant. For example, I’ve seen folks use pool noodles to hold their plants.  

Cannabis seeds do very well in a DWC system.

DWC Avocados!

Wick Systems

hydroponic cannabis seeds
Look at those grey wicks!

Wick systems are similar to DWC. In this setup, plants are suspended above the water, and “wicks” placed in the grow medium take up water and nutrients to feed the plant.

Wick systems are easy to setup as well. All you need is the following:

  • Wicks (Anything nylon, cotton, wool, microfiber cloths, etc.)
  • Reservoir for water and nutrients
  • Growing medium
  • Growing container

The most critical factor in a wick system is the growing medium. You need to have a medium that can hold moisture because that is what will feed the plant. Growing mediums such as coco coir and vermiculite are popular for this type of hydroponics.

The benefit of this system is that it is easy to get started and maintain. In addition, since your nutrients are in a separate container, it is easier to make adjustments than to remove the whole plant, as is the case in the DWC system.  

Ebb and Flow Systems

hydroponic cannabis seeds
Model of an Ebb and Flow System

Ebb and flow, aka Flood and Drain, is a popular hydroponic system. This system has a reservoir with a pump that delivers water and nutrients to the fill tray. The fill tray is a separate container where the plants are kept. The fill tray has a drain tube that sends the water back into the reservoir.

The system works because the pump sends the water from the reservoir into the fill tray. The water is then drained back into the reservoir from the drain pipe. The system is set on a timer so the roots can dry out and get oxygen in between watering.

This system is excellent for growing multiple plants. You can easily add or remove plants without doing any heavy lifting. The downside is this type of system can be hard to start.

You’ll need the following to get an Ebb and Flow System:

  • Reservoir
  • Submersible pump
  • Tubing for pump
  • Drain tube
  • Timer
  • Fill tray
  • Net pots
  • Airstone for reservoir
  • Grow medium

Ok, now that we have that all out of the way, let’s get onto the good stuff, hydroponic cannabis seeds.

How to Start Hydroponic Cannabis Seeds

You can use any cannabis seed in a hydroponic system. This includes both photoperiod seeds and autoflower seeds. They are planted and grown pretty much the same way except for a few differences.

  1. Autoflower cannabis seeds do not rely on a lighting schedule to go into flowering.
  2. Autoflowers plants do not require as much growing space as photo plants.
  3. You cannot use high-stress training on autoflowers

How to Plant Hydroponic Cannabis Seeds

Starting your seed.  Read our How to Start Marijuana Seeds in Rockwool article for a detailed guide to germinating your seeds.

The first part of your hydroponic journey is to germinate your cannabis seeds. There are many ways to germinate cannabis seeds. The way I like to do this is by using Rockwool cubes. All you have to do is soak the cubes in 5.5 ph water. After about 30 minutes, you can drop your seed into the hole and pinch the top closed. Next, place the cube under a grow light and keep the humidity high. Your seed should germinate in a few days. It’s that easy!

After your seed develops roots, you’re ready to move it into a permanent setup.  

How to Grow Autoflowering Cannabis Seeds Hydroponically

Ok. So far, we’ve germinated our seeds, and they have started to grow and develop roots. Now it is time to move them into our hydroponic setup. If you’re growing autoflowers, then Deep Water Culture or Wick would be a great choice. In this article, I will walk you through a DWC setup.

Supplies for Hydroponic Cannabis Seeds DWC

Before I give you the supply list, I just want to say that just the thought of doing this setup was too overwhelming for me. It took me a while to calm down and get started. What I found was that it’s so easy to get going and maintain. So don’t be put off if this seems like a lot. Just take it one step at a time, and you’ll get there.

Assembled deep water culture hydroponic system
  • Aquarium air pump
  • Airstone
  • Black air tubing
  • Hydroton
  • 5-gallon black bucket
  • Net Pot
  • Cannabis seeds of your choice
  • Grow light
  • Grow tent (optional)
  • TDS Meter
  • Nutrients and PH solution
  • Fan for air circulation

Once you have your supplies, assembling the system is a breeze.

  1. Clean your buckets. Make sure there is no residue or foreign matter in your bucket.
  2. Connect your air tubing to your air pump.
  3. Run the other end of your tubing through the holes of your net pot.
  4. Connect the air stone. The stone will sit in the water to oxygenate your cannabis seeds’ roots.
  5. Hang your grow light 18 inches above the top foliage

Here is a video on a cannabis plant in a DWC system.

Presoak and Prepare Your Hydroton Beforehand

It’s important to note that you must clean and soak your hydroton before using it. When you receive your hydroton, the clay pellets are dusty, and you don’t want that dust in your setup. Get a strainer and pour your hydroton in it. You must use enough to cover all the holes of your net pot. Rinse the pellets until the water runs clear and is no longer cloudy/muddy looking. Soak your pellets for at least 24 hours before use so they can absorb a sufficient amount of water.

Transplanting Your Seedling Into DWC Hydroponics

autoflowering cannabis seeds
Rockwool cube on hydroton base. Next step is to cover the cube until you cannot see the holes in the net pot.

Taking your seedling and putting it into a DWC system is extremely simple. All you need to do is take your hydroton, put a layer of it on the bottom of your net pot, place your seedling in and cover until the net pot is full. Be careful that you don’t pour the hydroton directly onto the seedling. The stem has not fully developed yet, and you could break it if you are too rough.  

Now you are a cannabis grower! Congrats!

If you need seeds and nutrients, I highly recommend one of our complete grow kits.

This picture is a great illustration of one way to run your tubing through the holes of the net pot.

Our upcoming articles will focus on nutrients and how I feed my cannabis seeds. In the meantime, please leave me any questions or comments below. I love helping others with their goals, so don’t be shy.

Here’s to your growing success!

The Autoflowering Cannabis Seeds Team

Originally published on: https://www.autofloweringcannabisseeds.org/blog/hydroponic-cannabis-seeds

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