The IKEA greenhouse is like a giant terrarium. It creates a microclimate by locking in humidity and cycling water to carbon dioxide and back again. This allows plants that thrive in humid environments to thrive in your home. Thankfully, you don’t actually need much to create your own greenhouse at home. As long as you have space for a display cabinet, you can build your very own greenhouse with ease. All you need are a few products to get you started.