Try to offer as much variety as possible at your pickup sites so customers don't have to make a number of stops to obtain their food supply. People are used to supermarket shopping and finding everything they need for dinner from lettuce to desert. One way to increase product variety is to network with other growers in your area to provide products for the customers that you don't offer yourself. If you grow vegetables, for example, consider supplementing your product selection by cooperating with a grower who has maple syrup or a vineyard, etc. The exchange may be in barter or trade.
Customers usually prefer a longer season of fresh-harvested crops.
For example, it is preferable to have a steady supply of broccoli over many weeks rather than a huge amount all at once. Since it takes a few years to refine estimates of production and customers' needs, don't commit all your produce volume to subscription farming at first. Develop additional markets such as health food or grocery stores, wholesalers or farmers' markets to provide an outlet for extra produce. If few members are available to join, each member will have to pay more per share. Often, two households will share an allotment.