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Explore the proven benefits of growing cannabis without the use of soil

What is Hydroponics?

Hydroponics is a term used for growing plants in a medium without soil. This can sometimes be referred to as soil-less growing. This is the preferred method for professionals growing cannabis indoors as It produces a more quality flower, higher consistency with lower risk of bugs and molds and three times the growth speed over soil growing methods, achieving up to double the number of harvests a soil system can in a year. You will reduce quite a bit of labor, water, and nutrients with a hydroponics system, making it favored by commercial growers and busy individuals alike.

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We specialize in hydroponics and have carefully perfected every type of automated hydroponic system. For over 20 years we have been designing, developing and field testing the best methods of hydroponic growing and we would be glad to share our knowledge with you.


Today we are proud to be able to bring the level of experience with hydroponics that the cannabis cultivation industry needed. Offering fully automated turn key DIY instructions designed specifically to your space. Designed by growers, for growers.

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Deep Water Culture 

Deep water culture is a method of hydroponics where your plant sits in a net-pot and the roots grow into a bucket of aerated water that is recirculated through the entire system. Instead of the roots living in the air with nutrients brought to them, this is reversed, the roots sit in the nutrients and the oxygen is brought to them.


  • Fill a large space with minimal plant numbers (Great for medical licenses)

  • Grow large bushes indoors

  • Over 90% reduction in nutrients/water

  • Can handle 360-degree lighting or (tops & drops) style lighting

  • The best system in case of a power outage

  • Fast growth speed

  • No mediums to change other than small net-pot worth of clay rock

  • Reduced labor

  • One of the best systems for plants flushing phases

  • Scalable to any size

  • Reusable medium

  • Fully automated​

  • Impossible to overwater

  • Flush with ease

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Drip Rockwool

Rock-wool drain to waste is an excellent system for the scalability and ease of maintenance that many large scaled cannabis facilities need. You will see a lot of both beginners and professional growers using this method with its tidy clean-up and excellent absorption rate, while not really being able to over-water.

Its ease of operation extends into the cloning and vegetative as well. Being square cubes of even proportions they fit uniformly together on cloning trays and vegetative racks. Making this an easy method for busy, large-scale production.


  • Easy transplanting

  • Less equipment needed over other hydroponic methods

  • Nearly impossible to overwater

  • Sanitary and hard for bugs to walk on

  • Highly scalable and easy to add or remove plants

  • Low vegetative time, quicker crop turnovers

  • Fully automated​

  • Small vegetative rooms needed

  • Vertical growing friendly

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Nutrient Film

Nutrient film technique is a hydroponic method of growing plants in which your plants have the nutrient solution brought to them to continuously or intermittently pass over a non absorbent plant medium such as clay rock or a PVC pipe.


  • Less equipment needed then DWC

  • Grow large plants or tightly spaced

  • Can handle 360-degree lighting or (tops & drops) style lighting 

  • More versatile to build

  • Fast growth speed

  • No mediums to change other than small net-pot worth of clay rock

  • Reduced labor

  • Scalable to any size

  • Fully automated

  • Can be built in stadium or tiers

  • Impossible to overwater

  • Reusable medium

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© 4Trees Cannabis Building Ltd 2021

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What are the downsides?

Hydroponics systems can cost more upfront then a soil growing system as they involve more equipment. Pump filters and feed tanks will need extra care in cleaning.

If running any aeroponics or rock-wool systems you will need to have a generator on hand to avoid crop dehydration in the case of a power outage, whereas deep water culture systems are by far the best methods in case of power outages. All the different hydroponic methods have their pros and cons, and on this page we will explain the most popular hydroponics methods for cannabis growing.

The perks are through the roof!

The benefits of going with an automated hydroponics system are huge. All the professional cannabis cultivators go hydroponic, here's why.

  • Increase crop turnover time

  • 3x faster growth speed

  • Larger buds

  • Product consistency

  • Reduced water consumption

  • Full automation

  • Reduce labor

  • Reduce bugs and molds

  • Wifi controllable systems

  • Increase product potency

  • Richer terpene profile

  • More control over your plants

  • Organic or vegan based nutrients

  • Greatly reduced nutrient usage

"Dan and his team are professionals when it comes to construction and planning in the cannabis revolution. Dan's knowledge and expertise are second to none and his custom buildings and grow operations are the future on this "budding" industry. Everything from site plans and blueprints to contractors and pricing, these guys are professionals. I recommend Dan for anyone looking for professionalism and extensive knowledge in this industry." 

 - Marshall, Grass Roots

4 Common Hydroponic Methods

01/ Rock-wool (Drain to waste)


Rock wool drain to waste style growing can be done in single blocks, cube, and slab. This is a great method for ease of maintenance or large scale indoor farming applications like micro cultivation that are transitioning from soil or want an easy hydroponic method

02/ Nutrient Film Technique


Nutrient film technique is a method where the nutrient solution is passed over the roots and is great for someone stepping up from a drain to waste system

03/ Deep Water Culture


Deepwater culture is commonly done in 5-gallon buckets and is best for growing larger bushes or trees. This system requires a bit more equipment for water control than the previous two methods

04/ Aeroponics


Aeroponics and high-pressure aeroponics are some of the most advanced hydroponic methods and are recommended for people with some experience

Health Canada approved floor-plans designed by master growers and licensed engineers. Offering full scale planning packages for medical, standard and micro cultivation.

  • Automated Hydroponics

  • HVAC Requirements

  • Lighting & Environmental

  • Guaranteed Approval

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Professional cannabis consulting. Stay on top of things with structured monthly programs catered to your facilities strain, nutrients, grow room and lighting all from your phone.

  • Regular Garden Check-Ups

  • One on One Consulting

  • Structured Monthly Programs

  • Analytics & Project Management

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Room to grow? Every grow room design comes with detailed wholesale hydroponics lists. Offering all the latest automated growing technology delivered discreetly anywhere in Canada.

  • Health Canada Approved

  • Wholesale Pricing

  • Discreetly Delivered

  • 20% - 40% Below MSRP

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Do you want to learn about commercial grow room design plans, hydroponic systems,  HVAC and everything else related to cannabis cultivation? . Schedule a Free 15 minute video or phone call today below. 

FREE 15 min.
 Same Day Consultation

GST Number: 705131274 RT0001

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4Trees Cannabis Building Ltd

Victoria, B.C, Canada

Phone us toll-free
1-833-812-0177 or 250-419-3511

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