A procedure is proposed to determine the optimal beginning and ending weeks of the tomato export period for a Canary farm. The weekly man-hours dedicated to each one the activities are the main element to evaluate both fixed cultivation costs, for the whole season, and also variable cultivation costs, accordingly to the campaign’s week. However, the weekly costs of packaging and commercialization are mainly associated to export levels. The optimal export period is determined by using estimates of the weekly tomato production exported to the European markets, and of the corresponding weekly prices at these destination markets.