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How to Build Your Own Indoor Greenhouse Cabinet

Indoor Greenhouse Cabinet

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An indoor greenhouse cabinet is a popular choice for those who want to grow plants indoors without taking up too much space. It is a great option for those who live in small apartments or houses, or for those who want to grow plants year-round regardless of weather conditions.

An indoor greenhouse cabinet can also help protect plants from pests, diseases, and other environmental factors that can harm them.

Indoor greenhouse cabinets come in different sizes and shapes and can be customized to fit specific plant growing needs. They can be built from scratch or purchased as pre-made kits, making them a fun and rewarding DIY project for those who enjoy working with their hands.

With the right setup, an indoor greenhouse cabinet can provide the perfect environment for a wide range of plants, from herbs and vegetables to flowers and succulents.

How to Build Your Own Indoor Greenhouse Cabinet

Building your own indoor greenhouse cabinet can be a fun and rewarding DIY project.

Here are some general steps to get started:

Choose the Size and Location… The first step is to decide on the size and location of your indoor greenhouse cabinet. Consider the available space you have; also know the plants you plan to grow and how much room they need.

Gather Your Materials… You will need materials such as wood, clear plastic, LED grow lights, a fan, a power strip, and screws. You can also use tools such as a saw, drill, and screwdriver.

Build the Frame… Start by building the frame of your cabinet. Cut the wood to size and assemble it using screws. Make sure the frame is sturdy and level.

Add the Clear Plastic Panels… Cut the clear plastic panels to size and attach them to the frame using screws or adhesive. This will create the walls of your greenhouse.

Install LED Grow Lights… Install LED grow lights inside the cabinet. Position them so that they provide adequate light to all plants.

Add a Fan… Install a fan to provide airflow and prevent excess moisture from building up inside the cabinet. A small, low-power fan should be sufficient.

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Install a Power Strip… Put a power strip inside the cabinet to provide power to the LED grow lights and fan.

Locate and Install Shelves… Add shelves inside the cabinet to hold your plants. Make sure they are sturdy and level.

Test and Adjust… Once your indoor greenhouse cabinet is complete, test it out to make sure everything is working properly. Adjust the lighting and fan as needed.

Start Growing… Once your cabinet is ready, you can start growing your plants. Make sure to monitor temperature, humidity, and moisture levels to ensure optimal growing conditions.

Remember to do your research on the specific plants you plan to grow, as they may have specific requirements for lighting, temperature, and humidity.

Here’s a video for some ideas with your greenhouse cabinet.

Can You Use a Wooden Cabinet for a Greenhouse?

While it is possible to use a wooden cabinet as a makeshift greenhouse, it may not be the most effective or durable solution for growing plants. Wooden cabinets are not typically designed to withstand the humid and moist conditions that are necessary for plant growth. The wood may eventually rot or warp, and the cabinet may not provide adequate insulation for the plants.

If you are looking to create a greenhouse, it is recommended to use materials that are specifically designed for that purpose, such as polycarbonate panels or greenhouse plastic. These materials are typically more durable and can better withstand the conditions of a greenhouse.

However, if you only need a temporary solution for starting seedlings or small plants, a wooden cabinet could be used with some modifications. For example, you could add a plastic lining to the inside of the cabinet to help prevent moisture from penetrating the wood. Additionally, you may need to install additional ventilation and a heat source to regulate the temperature and humidity inside the cabinet. Check out Amazons Greenhouse Cabinets Here.

How Do You Keep Greenhouse Cabinets from Molding?

To keep greenhouse cabinets from molding, here are some tips you can follow:

Keep the Cabinets Clean… Regular cleaning is essential to prevent mold growth. Wipe down the cabinets with a damp cloth or sponge and mild soap to remove any dirt, dust, or grime that can contribute to mold growth.

Control Humidity Levels… Mold thrives in damp and humid conditions. Use a dehumidifier or air conditioning unit to maintain a relative humidity level between 30% and 50%. If the cabinets are located in a particularly humid area, you may need to use a moisture-absorbing product like silica gel or activated charcoal.

Improve Air Circulation… Good air circulation is essential to prevent mold growth. Use fans or open windows to improve ventilation in the greenhouse cabinets.

Use Mold-Resistant Materials… If you’re building or renovating the cabinets, use mold-resistant materials like plastic, metal, or sealed wood. Avoid using materials like unpainted drywall, which can absorb moisture and provide a breeding ground for mold.

Inspect for Leaks… Leaks from pipes, roofs, or windows can create damp conditions that are ideal for mold growth. Regularly inspect your greenhouse cabinets for any signs of leaks, and promptly repair any issues that you find.

How do I Keep My Indoor Greenhouse Cabinet Warm?

There are several ways to keep your indoor greenhouse cabinet warm:

Insulate the Cabinet… Use insulation materials such as foam boards or bubble wrap to insulate the cabinet. This will help to retain the heat within the cabinet.

Use a Space Heater… A space heater can be used to provide heat within the cabinet. Make sure that the space heater is safe to use and does not pose a fire hazard.

Heat Mats… You can use heat mats underneath your plants to keep them warm. These are available in various sizes and can be placed inside the cabinet.

Grow Lights… Grow lights not only provide light to the plants, but they also emit heat. This can help to keep the cabinet warm.

Use a Thermostat… A thermostat can be used to control the temperature inside the cabinet. This will ensure that the temperature remains constant and does not become too hot or too cold.

Use a Timer… You can use a timer to turn on and off the heat source at specific times of the day. This will help to regulate the temperature inside the cabinet and save energy.

Consider the Placement… Make sure that the cabinet is placed in a warm location away from drafts and cold air. Also, avoid placing it near windows or doors that may let in cold air.

How Do I Increase the Humidity in My Greenhouse Cabinet?

There are several ways to increase the humidity in your greenhouse cabinets.

Here are some effective methods:

Watering… One of the simplest ways to increase humidity is by watering the plants in your greenhouse cabinets. Watering the plants will not only provide them with moisture but also release water vapor into the air, thus increasing the humidity. However, make sure not to overwater your plants, as this can lead to problems like root rot.

How to Grow Mushrooms

Misting… Another effective method to increase humidity. You can use a spray bottle or a misting system to spray a fine mist of water into the air, which will increase the humidity in the greenhouse cabinets. However, be careful not to mist your plants too much, as this can lead to fungal growth and other problems.

Humidifiers… You can use a humidifier to add moisture to the air in your greenhouse cabinets. There are many types of humidifiers available, including ultrasonic, evaporative, and steam humidifiers. Choose the one that suits your needs and budget.

Damp Cloth… Placing a damp cloth or sponge in the greenhouse cabinets can also help increase humidity. The cloth or sponge will release moisture into the air, which will increase the humidity. Just make sure to keep the cloth or sponge clean to prevent the growth of mold or bacteria.

Gravel Tray… Another effective method to increase humidity is by placing a tray of gravel filled with water in the greenhouse cabinets. The water in the tray will evaporate, which will increase the humidity in the air.

Remember that the ideal humidity level in a greenhouse cabinet can vary depending on the plants you are growing. In general, most plants prefer a humidity level between 50-70%.

Related Reading

How to Choose a Lean-to Greenhouse Kit
10 Benefits of an Indoor Greenhouse
Will an Indoor Greenhouse Work Inside a Shed?
How to Choose the Right Greenhouse Heater

How Do you Waterproof Wood Cabinets for Plants?

There are several ways to waterproof wood cabinets for plants, depending on your specific needs and preferences.

Apply a Waterproof Sealant… You can use a waterproof sealant, such as polyurethane or epoxy, to protect the wood and prevent water damage. Apply the sealant according to the manufacturer’s instructions and be sure to coat all surfaces of the cabinet.

Use a Waterproof Liner… Another option is to line the interior of the cabinet with a waterproof liner, such as a pond liner or plastic sheeting. This will create a barrier between the wood and the plants, preventing water from seeping in.

Use Marine-Grade Plywood… If you’re building a new cabinet, consider using marine-grade plywood, which is specially designed to resist water damage. This type of plywood is made with waterproof adhesive and has a special coating that helps protect it from moisture.


Use a Water-Resistant Wood… Some types of wood are naturally more resistant to water damage than others. Teak, cedar, and redwood are all good options for outdoor cabinets. Be sure to choose a wood that is untreated and free of any finishes that could be harmful to your plants.

No matter which method you choose, be sure to regularly inspect your cabinet for signs of water damage and make any necessary repairs as soon as possible.

What Should Humidity Be in an Indoor Greenhouse?

The optimal humidity level in an indoor greenhouse can vary depending on the type of plants being grown and their stage of growth. However, in general, a humidity level of 50-70% is recommended for most plants during the vegetative growth stage.

During the flowering or fruiting stage, some plants may benefit from slightly lower humidity levels, around 40-60%, to prevent mold or mildew growth on the flowers or fruit.

It’s important to monitor the humidity levels regularly using a hygrometer and adjust the humidity as needed by using a humidifier or dehumidifier. Proper ventilation and air circulation can also help to maintain the ideal humidity level in the greenhouse.


Building your own indoor greenhouse cabinet can be fun and educational and a great way to have fresh vegetables to eat all year round. Check out Teds Woodworking for plans and ideas on building all kinds of projects… Start with a greenhouse.

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