Technical Abstract: Many consumers consider organically produced fruits and vegetables to be healthier and safer then conventionally grown fruit. Because of this, consumers are often willing to pay more for organically grown crops. However production of organic fruits and vegetables can be challenging, especially in climates where weed, insect and disease control is difficult. Knowing which varieties of fruits and vegetables perform best under organic growing conditions is imperative for a good harvest. Unfortunately, there is limited information on watermelon (Citrullus lanatus var. lanatus) varieties that do well under organic growing conditions. Because of this, production characteristics of six watermelon varieties from certified organic seed sources under high and low input organic cultural practices in Southeastern Oklahoma were compared to determine which varieties perform best under both methods. High input production methods almost doubled the number of fruit produced for all varieties, producing greater yields and higher average fruit weights compared to the low input production methods. Statistically different sizes and yields were found between the varieties planted.