electrical for greenhouse and garden

Electrical for Greenhouses & Gardens

Does Your Garden or Greenhouse Need Electricity?

Boost your plant growth during colder months with an electrically outfitted greenhouse and garden. Grocery prices aren’t getting lower anytime soon – that’s why utilizing a greenhouse and garden can be a worthwhile investment. 

Greenhouses can range from small sheds to industrial-sized buildings, and a basic greenhouse can work great for anyone looking to give their plants a healthy boost. 

While a greenhouse can work without electricity, you can greatly improve your yield with a well-functioning electrical system. 

Installing a garden electrical junction box can also make it much easier to power lawn mowers and hedge trimmers, along with providing power to outdoor garden lights and water features

Does Your Greenhouse & Garden Need Electricity?

Just like most things home-related, the answer to this question depends entirely on what you need your greenhouse and garden to do. 

Using electricity in a greenhouse can be helpful for tropical plants, as well as many kinds of temperate plants that need protection from the winter cold.  Lighting and heating in greenhouses are also essential for rooting cuttings and germinating plants. 

Before you decide to power your greenhouse and garden, ask yourself:

  • What do I want to use my greenhouse and garden for?
  • Do I need to extend the growing season?
  • Do my plants need to be kept frost-free?
  • Does the operating cost outweigh the value of produce my plants will provide?

While there are a variety of options to heat and light your greenhouse and garden, electricity is the best option. Unlike natural gas or liquid gas/oil, it’s versatile, easy to control, and allows you to use various types of equipment.

Why should you avoid using natural gas or liquid gas/oil?

  • Gas and oil are combustible
  • Creates high levels of gasses and condensation
  • Higher loss in heat and energy
  • Failure to remove toxic gasses can be harmful to you and your plants
  • Costs more to install and maintain

With the price of gas, using electricity in your greenhouse and garden is the most cost-efficient route. 

How To Run Electricity To Your Greenhouse & Garden

Unless you’re an electrician, always hire a professional to wire your greenhouse and garden. Hiring a professional will ensure that your wiring is up to regulatory standards, otherwise, insurance companies could refuse to cover you in the event of a claim. 

Having a power supply isolated in the greenhouse and garden can make it much easier to switch power on and off, rather than having to go back and forth to your main panel. This can be achieved with an underground conduit. 

Your power supply should be fitted with safety devices that will allow you to disconnect the power from the system in case the supply cable gets damaged or overloaded. 

Typically, powering your greenhouse and other garden appliances can be done one of two ways:

  • Installing a circuit breaker and wire each of the appliances into separate breakers
  • Setting up a number of waterproofed, fused power sockets to plug appliances into

Installing 110V and 220V outlets with the equivalent amperage of that needed to supply a normal-sized room should be enough to cover your needs. It’s best to add as many outlets as you can because it can be more of a hassle to install them later. 

The last thing you’ll want is an out-of-reach outlet while you’re gardening! That’s why it’s important to hire a professional to do the job right because they’ll know exactly how much electricity you’ll need and where.

Maintain A Steady Temperature For Your Plants

Temperature control is essential if you want your greenhouse to be successful. 

It’s worthwhile to consider these 3 forms of greenhouse heating:

  1. General heating

To achieve frost-free conditions, a thermostat-controlled fan heater set to an ambient temperature can work great.

The same heater can pull double duty during the summer months by turning off the heating element and operating as a fan only. 

Adequate ventilation of fresh air and reducing humidity can help your plants to avoid growing mold and fungi.

  1. Bottom heat

Installing a thermostat-controlled heated bench or mat can create a perfect temperature for rooting cuttings or germinating seeds. 

While you can do it yourself and construct your own beds, there are premade beds available to buy. 

  1. High-level heating

When higher temperatures are needed, use a thermostat-controlled propagator and manually adjust it to your desired temperature.

It’s important to note that all of your plugs should be waterproofed. A professional electrician will make sure of that. 

Another thing to keep in mind is installing insulation into your greenhouse. With a home or commercial building, single-pane windows can cost you in energy bills. The same goes for a greenhouse.

Installing a lining of bubble plastic or cellophane inside of the roof and walls will reduce heat loss and save you from costly energy bills. 

Find Your Light Solutions For Plant Growth

Plants need light to germinate, but natural light in your greenhouse can be lost if you have fitted insulation. An electrical light system within your greenhouse will counteract the loss of natural light and encourage plant growth.

For greenhouse lighting, fluorescent lights designed for damp conditions can be used. Fitting time-controlled fluorescent lights can supplement poor natural light during the winter months. This can be achieved with a simple adaptor that fits into a wall socket. 

With all of this heating and lighting being used, how can you avoid a spike in energy costs?

Grow lights are a perfect solution for your greenhouse. Energy-efficient LED lights will operate cooler than regular lights and guard against leaf burn on your plants. With its low heat emission and low energy consumption, investing in grow lights will help save you from costly energy bills. 

Alternatively, a light control system could reduce electrical costs by 33%. 

More Benefits of Installing Electricity In Your Garden:

Installing electricity in your garden can be beneficial in all seasons as you can power:

  • Automatic watering systems
  • Any accessories that need a good power supply to run
  • Garden lights to create a cozy atmosphere and provide a visual aid when using the garden at night


While there are temporary solutions available, installing permanent electricity is a longer-lasting solution to getting electricity to your greenhouse and garden. 

Gardening can be a big job. Having electricity available makes it that much more convenient. 

Kobalt Systems For All Your Garden Electrical Needs

Founded in 2015, Kobalt Systems offers expert full-service electrical, communications, and security services. 

Our professional team of highly trained master journeyman electricians offers cost-effective electrical solutions for your backyard. 

Contact us today about improving your gardening game, and so much more.