CANNES — Samuel L. Jackson and John Sayles are joining the creative team for “Oh Carolina,” an indie pic that will mark the first feature product of a low-budget film joint venture, Fresh Produce, from Seattle-based entrepreneur Joyce Schweickert and producer Marshall Persinger.Jackson will co-star in the project. Sayles will exec produce. Pic, to be directed by Sandy McLeod and scripted by McLeod and Eugenie Bafaloukos, is set to begin production in mid-July in Florida. Schweickert’s Seattle Pacific Investments and Persinger’s Fresh Produce Co. are banding together to produce pics in the $3 million to $8 million range. The company will be L.A.-based.