**Abstract**

The study was carried out during the growing seasons 2016-2018, collage of Agricultural Engineering Science—Salahaddin University—Erbil. For studying the effect of photoperiod on flowering and yield of two cultivars of strawberry, Festival and Albion were covered with black clothes for (0, 2 and 4 hours). The experiment was laid out in randomized complete block design with three replications for each treatment. Ten plants per experimental unit were arranged randomly in 54 plots. The data were analyzed using (SAS) program. As a result, when propagating the strawberry, the number of runners produced by the adult plants is an important consideration. Parameters significantly increased at photoperiod for 4 h included: for Festival in the first season, number of flowers, plant-1, viability pollen grain% and fruit set% in the first and the second seasons for Festival, (fruit dry weight and dry weight%) for Albion increased in the first season, (fruit fresh weight, fruit size and fruit length) for Albion in second season, (number of fruits. plant-1 and fruit diameter) for Festival in first season, marketable fruits% for Albion in second season, Yield. plant-1 (g) and yield, hectare-1 (Kg) significantly increased at photoperiod 4 h for Festival (100.591) in second season and (96.633) in first season.

**Keywords:** photoperiod, *Fragaria X ananassa* Duch., flowering, yield, Albion, festival
