How to Turn Your Garage Into a Greenhouse

It’s no secret that recent years have seen a huge surge in interest in sustainable living and eco-friendly gardening. It is important to know how to turn your garage into a greenhouse. If you’ve been wanting to do your part by growing your food, but lack the space, why not turn your garage into a greenhouse? 

How to Turn Your Garage Into a Greenhouse

It may seem like an intimidating undertaking at first, but with a few clever modifications, it can be done quite easily. In this post, we’ll cover what you need to know about turning any garage into an environmentally sound ecosystem of lush greenery!

Summary: Turning a garage into a greenhouse can be an eco-friendly and cost-effective way to grow plants and vegetables. The process requires some simple steps, such as insulating the walls, installing a heating and cooling system, as well as getting appropriate windows and vents. These steps will help maintain optimal temperatures for your plants while protecting the environment.

Tools You Will Need

Before you begin, there are a few tools and supplies you will need to assemble to successfully turn your garage into a greenhouse. Here’s what you’ll need:

  • Tarp or plastic sheeting
  • A hammer and nails
  • Wood or metal framing material for walls and ceiling
  • Hinges and door hardware
  • Glazing material (glass or acrylic)
  • Fans and ventilation system with air filters
  • Heating and cooling systems
  • Lighting fixtures

6 Steps Guide on How to Turn Your Garage Into a Greenhouse

1. Prepare the Space

Start by measuring and preparing the space in your garage for transformation. Make sure to measure twice, and cut once! If you’re excited about having your greenhouse to tend to and grow lush, thriving plants, the planning phase is essential. Start by measuring out the intended space for conversion in your garage.

Having exact measurements makes it easier to decide on the types of greenhouse structures and materials that you need to best suit the space. 

To get reliable measurements and avoid waste during installation, make sure to measure up twice and then cut once when assembling any needed elements. With careful preparation of your space, you can ensure smooth progress in turning your garage into a functional and visually pleasing greenhouse of your own.

Preparing the Space in Your Garage for Greenhouse

2. Create a Frame

You’ll need to build a frame for the walls, ceiling and door using either wood or metal framing material. This will be what holds up the glazing material (glass or acrylic).

Turning your garage into a custom greenhouse is an exciting way to enjoy growing vegetables and herbs all year round. Building the frame that will eventually house the glazing material is an essential step in this process, requiring either wood or metal framing material.

If you are using wood for your framing, select lumber that is specially treated for exterior use, protecting it from moisture. 

When using metal for your frame, select galvanized steel beams and sections, as they will be able a handle extreme weather conditions and provide the framework with superior strength. With the right materials in hand, you’ll soon have a beautiful structure ready to welcome plants from spring through winter.

3. Install Insulation

Next, install foam board, fiberglass batting, and other insulation materials to the frame you’ve just created. This is essential in maintaining consistent temperatures inside the greenhouse.

Installing insulation is the next step in transforming your garage into a greenhouse. Foam board, fiberglass batting, and other insulation materials need to be applied to your frame to create an effective barrier between the inside of the greenhouse and outside temperatures. 

This essential step helps keep soil temperatures and air temperatures consistent within the greenhouse. 

Create a Frame for Greenhouse in Garage

It is crucial for healthy plant growth! Keep in mind that installing insulation will require some preparation beforehand, so take the time to ensure you’re using quality gauges and measurements. With reliable insulation in place, you’ll soon have a welcoming oasis ready for planting year-round.

4. Attach Glazing Material

Once your frame is securely in place, you can begin attaching the glazing material. This should be done carefully and securely to avoid any cracks or leaks.

Attaching the glazing materials is an important step in completing your greenhouse transformation. Be sure to do this carefully and securely—spend extra time if necessary to make sure it’s done correctly. 

If installed improperly, you may run into problems such as cracks or leaks down the line. Double-check your work to ensure that the frame is completely sealed, and you’ll be one step closer to having a greenhouse of your own!

5. Ventilation System

Installing a fan-powered ventilation system into your greenhouse is integral for the success and health of your plants. Not only does it introduce fresh, oxygenated air, but it also helps to regulate temperatures from getting too hot. To add an extra layer of comfort, you should install air filters that prevent pollen, dust, and allergens from entering the greenhouse. 

This will ensure the highest quality of air within your space and discourage cross-contamination between different types of plants. As the green revolution continues to progress, there are now a variety of modern fan-powered ventilation systems available online so you can find one that suits both your needs and budget to turn your garage into a perfect greenhouse environment.

Install Insulation for Greenhouse

6. Heating and Cooling

Installing heating and cooling systems for your greenhouse is essential to maintain the desired temperatures for your plants. Depending on where you are located, this could mean setting up a thermostat, heater, or air conditioner to get the environment just right. 

It’s important to factor in how warm or cool your area typically gets through each season so that you can provide the ideal climate for your vegetation. The addition of these important components will ensure that you have an effective greenhouse with healthy plants even during the hottest days and coldest nights.

And there you have it! With a few simple steps and the right tools, transforming your garage into a greenhouse is relatively easy. Once you’ve got everything set up, you can start planting and growing whatever veggies and herbs strike your fancy!

Tips to Turn Your Garage Into a Greenhouse

  1. One of the first things you need to do when turning your garage into a greenhouse is to insulate the walls and ceiling. This will help to keep the heat in during the winter and cool in during the summer. There are a variety of insulation materials you can use, such as fiberglass, foam board, or bubble wrap.
  2. If you live in an area with cold winters, you’ll need to install a heater in your garage greenhouse. There are a variety of heaters available, including electric, propane, and wood-burning. You’ll need to choose a heater based on the size of your greenhouse and your climate.
  3. If you live in an area with hot summers, you’ll need to install a cooling system in your garage greenhouse. There are a variety of cooling systems available, including fans, air conditioners, and evaporative coolers. You’ll need to choose a cooling system based on the size of your greenhouse and your climate.
  4. Ventilation is important in any greenhouse, as it helps to circulate air and prevent mold and mildew from forming. You’ll need to install at least two ventilation fans in your garage greenhouse – one at the top and one at the bottom. The fans should be connected to a timer so that they turn on and off as needed.
  5. Not all plants will do well in a garage greenhouse. You’ll need to choose plants that can tolerate high temperatures and low humidity levels. Some good choices include cacti, succulents, and drought-tolerant plants.
  6. It’s important to water your plants regularly when growing them in a garage greenhouse. How often you need to water them will depend on the type of plants you’re growing and the climate you live in. In general, it’s best to water plants early in the morning so that they have time to dry out before nightfall.
  7. You’ll also need to fertilize your plants regularly when growing them in a garage greenhouse. How often you need to fertilize them will depend on the type of plants you’re growing and the climate you live in. In general, it’s best to fertilize plants every two weeks using an all-purpose fertilizer.

How to Create the Perfect Climate for Your Plants with Heating and Cooling Systems?

Creating the perfect climate for your plants is easier than ever with modern heating and cooling systems. Many horticulturalists recommend investing in a thermostat so that you can precisely control the temperature of your greenhouse; this will make sure your plants receive the ideal temperatures they need to thrive. 

Install Ventilation System for Your Greenhouse

Utilizing heating during cold days and nights, as well as shade screens or temperature sensors for sunny climates, is also essential for keeping plants healthy. Fans are a great way to provide good air circulation, which can help vent out bad air and stop pests from entering. 

The amount of water and humidity is one of the most important components in creating the perfect climate, so there are digital monitors available that will help you determine just how much water your plants require. 

For commercial facilities where larger amounts of plants need to be cared for, there are automated systems available to ensure everyone stays healthy. With these simple tools and devices, it’s easy to create the exact climate needed for whatever type of plant you’re caring for.

How to Choose the Right Plants for Growing in a Garage Greenhouse?

Growing plants in a greenhouse can be a fun and rewarding experience. When selecting plants for your garage greenhouse, it is important to keep a few factors in mind. The amount of sunlight that enters the garage and personal preferences should be the main considerations when picking out plants for growing. 

The temperature will likely play a role, as there are plants that prefer cooler or warmer climates. For example, flowers and vegetables might do better in a warmer area, while succulents may thrive in cooler air. It’s also important to assess if certain plants can complement one another; they could increase humidity levels, provide shade or spread helpful bugs among them. 

Lastly, consulting with an experienced greenhouse grower is always recommendable before taking on any new project; they can suggest specific plants that are suitable for your climate and offer useful advice on how to propagate more of them.

Installing Heating and Cooling Systems for Greenhouse


Utilizing a garage as a makeshift greenhouse is an excellent way to get a head start on the gardening season. You should carefully determine how to turn your garage into a greenhouse. 

By following these simple tips, you can turn your garage into a veritable oasis for plants and flowers – and have the envy of all your green-thumbed friends in no time!

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Rick Kelly

I am Rick. I grew up helping my dad with his handyman service. I learned a lot from him about how to fix things, and also about how to work hard and take care of business. These days, I'm still into fixing things- only now, I'm doing it for a living. I'm always looking for new ways to help people grow and develop. That's why I have created this blog to share all my experience and knowledge so that I can help people who are interested in DIY repair.

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