Thank you for all that responded.  It was very helpful.  These are the responses that we received.
1.  Pre pay a certain amount and get a percentage off.  i.e. Customer spends $100 and they receive a $110 credit.
2.  Weekly amount of fruit, veggies, herbs, etc. given to the customer at a certain time and day of the week.  The customer has to pay a fee at the start of the season and this program goes  until the farm is closed.  There are small, medium and large packages, and the customer pays for what package they want throughout  the season.  Small maybe $200, medium $325, large $440.

3.  Customer pays $50.00 for the season and receives 10% off what they purchase at the farm that season.
Thank you for all of the ideas!
Melissa, Charlotte Berry Farm

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