This project is about building a lean to greenhouse. If you want grow fresh legumes for your family, then you should know there is only one solution to your need: create a proper environment for the plants. Therefore, we recommend you to build a small raised garden bed or wooden greenhouse There are many shapes you could choose from, according to your tastes, budget and configuration of your backyard.
If you have a large garden, then you should build a large greenhouse, otherwise you should consider attaching it to your house. There are many lean to greenhouse plans you could choose from, so you should pay attention to all these alternatives. Either you build a lean to greenhouse and place it to a corner of your property or you just attach it to an existing building, there are several things you should consider, if you aim for a professional result.
Building a lean to greenhouse
Use 2×4 lumber to build the frame of the greenhouse. Make sure you sue weather-resistant lumber, as they will be in an environment with a lot of moisture. Work with great care and attention and always take accurate measurements, if you want to get a professional result.
Drill pilot holes trough the plates and insert 3 1/2″ galvanized screws into the studs. Generally speaking, you need to create a simple but rigid structure, similar to the frame of a shed. Place the studs equally spaced, every 24″ on center. Check if the corners are right-angled and place the walls into place.
After plumbing the walls with a spirit level and lock the adjacent walls together, by using wood screws. Cover the hole structure with polyethylene film and install vents between the rafters. If you want to automate the process, we recommend you to automate vent openers. Build a simple door out of 2×2 lumber and fit it inside the opening. Use metal hinges to lock the door to the jambs, after checking if the door opens propel.
More information about building a greenhouse here