You need to know what you will be growing. Your market will help if not decide what you will or can grow. It can be done but it’s tough to persuade a market into buying a product they haven’t been looking for. I mention this a lot throughout several blog post and it’s because it is the foundation of the greenhouse design.
The size of the greenhouse is based on several things. The first is volume of product you need to grow. How much product do you need to produce for the business to grow and succeed? Within this there are more specific attributes about the plants that factor into the greenhouse size. The size of the plants need to be taken into account. This is done by knowing how many can be grown per square foot. Let’s take lettuce for example. On average a finished head of lettuce needs 1 square foot when ready for harvest. Taking the amount of lettuce that needs to be grown for the business to make money we can start to get an idea of the area needed.