General Hydroponics GH4720

Product Name:GH4720
# Plants:8
Size Plants:Medium to Large
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The General Hydroponics GH4720 System at a Glance

The General Hydroponics GH4720 is an advanced drip hydroponic system with eight growing modules that is connected to a thirteen gallon reservoir and eight gallon controller unit. This unique controller unit keeps each grow unit topped off with the correct level of water and nutrients for low maintenance gardening. This system has an enormous growth capacity, with the ability to add up to four additional grow sites for a single controller.


This kit is great for gardeners who want to have a large garden with minimal time investment for maintenance. Some of the other positive aspects of the GH4720 include:

  • Low Maintenance. The built in system controller allows for you to set parameters for the system, then keep it topped off with the appropriate level of nutrients and water.
  • Included nutrients. Like most General Hydroponics systems, the GH4720 includes a starter set of 3-part flora series nutrients.
  • Expandable. The design of the system makes it possible to add up to four additional grow modules for a total of twelve on a single controller.
  • Popularity. The GH4720 is General Hydroponics’ best selling hydroponic module. The simple reason for the system’s popularity is because it is a very effective and efficient system.

General Hydroponics GH4720 System


The GH4720 is not the cheapest system out there, so the price can scare away novice gardeners. It’s also important to make sure that the system is set up correctly when you receive it, as a few reviewers have reported the need to drill holes that were missed in the original manufacturing of the system. It is also important to consider that this is a very large system, designed to support large growth and high-yield plants. It is necessary to dedicate space for this system to operate at its full potential.

It is also important to note that this kit does not include a growing medium, which some reviewers have indicated is not clearly communicated in kit description.


The GH4720 hydroponic kit is one of the more expensive systems that we review on this site. While the price and size of this system may be daunting to a new hydroponic grower, this is truly a premium system that produces a premium product. For a hydroponic gardener truly invested in exploring the full potential of the gardening form, I wold highly recommend exploring the GH4720.

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