Greenhouses plans for building your own greenhouse start with deciding on what you want to grow - for instance, a cold frame greenhouse would not be suitable for growing sensitive plants. The position and space you have available may also have an affect on your greenhouse design plans (and possibly fitting in with any other garden buildings). Greenhouses come in many shapes, styles, and sizes. Fruits, vegetables and flowers that might otherwise have struggled or are unsuited to growing outside can thrive in the warmth and protection of a greenhouse. Building your greenhouse need not be time-consuming or expensive but thorough planning and preparation is essential before starting your greenhouse project to ensure that the greenhouse you build is suited to your environment, budget, and the plants and seedlings you want to grow.
The above photos are of the lean-to greenhouse Darwin used to conduct many of his experiments. Lean to greenhouses are usually small to medium size greenhouses.