Indoor Hydroponic Systems: The Complete Guide

What Is an Indoor Hydroponic System?

Hydroponic systems involve growing plants without soil. Instead, they utilize nutrient-rich water that is oxygenated to provide the plant with everything it needs. This method of growing is ideal for indoor spaces and gives growers more control over the environment for better results. 

What Is Indoor Hydroponic Gardening?

Indoor hydroponic gardening involves growing plants indoors using a hydroponic system. There are a variety of hydroponic systems available depending on what you’re growing, your skill level, and your personal preference. 

Popular Types of Indoor Hydroponic Systems

Recirculating Deep Water Culture (RDWC)

A recirculating deep water culture (RDWC) system, also known as a deep water culture (DWC) system, involves a main reservoir of nutrient-rich water that is connected to many plant pots with piping. In this system, the plant’s roots are suspended in water and a pump is used to circulate a nutrient-rich solution throughout the plant pots. Air stones are typically used in each pot to add oxygen to the water. 

The Green Room offers hydroponic growing equipment that can be used to create a recirculating deep water culture system for indoor growing. 

Ebb and Flow/Fill and Drain

Ebb and flow, also called flood and drain, is a system that involves flooding the tray or pots where the plants are with nutrient-rich water, then draining the water back into a reservoir. This allows for a timed period of soaking and a period of dryness. 

The ebb and flow growing method is ideal for beginners. The Green Room has everything you need to get started. 

Subwater (Dirt/Rockwool Type Method)

A subwater or substrate growing system utilizes a medium such as dirt or rockwool to support the plants’ roots. Nutrient-rich water is then added to the media to give the roots what they need.

There are many different types of rockwool available for a subwater system. Rockwool is typically incorporated with wetting agents or a chemical surfactant to ensure that the media holds water.

The Green Room offers hydroponics growing equipment so you can build your own subwater growing system using dirt or rockwool. 

Closet System

A closet system, or grow box, is ideal for growing in small spaces. A grow box is a compact, closed system that allows for optimal control over the growing environment. Any type of lighting, heating, fan, and water system can be added to the closet system depending on the plants’ needs. 

The Green Room offers The Plug Micro Rack to create a closed environment that maximizes your space efficiency. 

How to Set Up an Indoor Hydroponic System

There are several things to consider when setting up a hydroponics system, including:

  • Choosing growing materials: A growing material is what gives the roots of the plants the support they need. Some popular growing materials for hydroponic systems include rockwool, clay, and coconut fiber. 
  • Filling buckets: Each bucket that will hold a plant should be filled until about three-quarters full of the growing medium. 
  • Adding nutrients: A nutrient-rich solution should be used to provide the plants with the nutrients they need since there is no soil. The way the solution is added will depend on the type of system being used. 
  • Planting your starters: Finally, you can plant your starter seeds into the growing medium, about a quarter to a half an inch deep. 

How to Grow Cannabis Indoors with Hydroponics

Cannabis is a popular plant to grow using indoor hydroponics. There are many benefits to hydroponic cannabis, such as better control over the environment, more protection from pests, and higher-quality yields.

Cannabis Indoor Hydroponics Supplies

If you’re going to grow cannabis indoors, there are some supplies you will need to get started: 

  • PPM + pH meter: A PPM + pH meter is used to measure the pH, conductivity, and temperature of the water to ensure that you are maintaining a healthy growing environment. 
  • Grow lights: Grow lights act as artificial sunlight for the plants. The amount of light your cannabis plants need will depend on the type of seeds you have. 
  • Cannabis seeds: There are many different types of cannabis seeds to choose from, including regular seeds, feminized seeds, and autoflowering seeds. 
  • Clay pellets: Clay pellets are a popular growing medium for hydroponic cannabis. The pellets can effectively absorb the water in the system to give the roots the nutrients they need. 
  • Correct number of buckets: Buckets provide the plant with extra support since hydroponic systems do not use soil. You will want to ensure that you have a bucket for each plant. 
  • Rockwool cube: Rockwool cubes provide additional support to the plants as their roots begin to grow. Rockwool is sponge-like, allowing for adequate water absorption and space for the roots. 

Is It Legal to Grow Cannabis Indoors?

The legality of growing cannabis indoors varies by state. If you’re considering growing cannabis indoors, whether residential or commercially, be sure to check local, state, and federal laws and regulations first. 

How to Find the Best Indoor Hydroponic Grow System

1. Determine What You Want to Grow

Almost any plant can be grown using a hydroponic system. However, some will work better than others. Some of the most common plants are lettuce, cucumbers, tomatoes, strawberries, and herbs. Cannabis is also a popular plant to grow hydroponically. 

The type of hydroponic system you need will depend on the specific plant you want to grow. Expert manufacturers understand that certain systems work better for certain plants. When it comes to growing cannabis or any other plant, The Green Room’s hydroponic systems can help you create the best environment.

2. Choose Your Type of Indoor Hydroponic System

When choosing an indoor hydroponic system, you will need to consider the plant you’re growing, your experience, and your access to the necessary equipment. Ebb and flow, RDWC, subwater, and closet systems are all great for beginners. Residential hydroponic systems are ideal for small-scale growing or when you’re just starting out. Those who are running a large-scale growing system can benefit from commercial hydroponic equipment. 

3. Look for Customization Options

When growing indoors, maximizing your space is important. The Green Room offers hydroponic systems that can fit any space and can be customized depending on your needs. 

4. Check for Safety Features

Having a hydroponic system with certain safety features can protect your space, equipment, and plants from damage during an incident such as a power outage. The Green Room offers hydroponic systems with safety features, including retentive pumping and gravity draining to avoid flooding during an outage. 

5. Prioritize Efficiency

An efficient hydroponic system can provide more cost-effective and eco-friendly results. The Green Room offers recirculating water systems that eliminate wastewater for environmental benefits. 

Start Your Indoor Hydroponic Garden with The Green Room

Ready to find the hydroponic system that works for you? The Green Room has everything you need with residential and commercial equipment. 

Contact us today to get started.