For the last three decades, small farmers have offered their customers a chance to cut out the middleman and get fresh produce and other locally produced goods delivered straight from the farm. The way it works is simple: CSA (which stands for Community Supported Agriculture) members pay a farmer up front for a whole season. That cash investment helps defray the high startup costs of farming, allowing farmers to buy equipment, seeds and fertilizer. In return, customers get a box of ultra-fresh produce or other farm products every week throughout the growing season. It sounds simple — but it’s certainly a different way to approach your weekly grocery need. Here’s what you need to know before you sign up.