25 Greenhouse Flooring Options Seven: Choosing between greenhouse flooring options includes considering many different factors. Drainage, decom- position, price, heat retention, comfort, and traction vary between flooring types and allow for a customization of your greenhouse that extends beyond visual appearance. Read on for some considerations when choosing your greenhouse flooring: Drainage As mentioned, drainage is crucial in a wet environment like a greenhouse. If you’re leaning toward a solid flooring material, like concrete, keep in mind that you’ll need to install drains to help keep your greenhouse flooring dry and your plants healthy and free from mold. You should consider the location of the drains carefully to ensure the drain is not in the middle of a proposed walkway or working area. Other materials, like gravel, concrete pavers, and flagstones also drain well and are most common.