This present paper is aimed to examine effects of acidity on in-vitro polen germination and tube length of Prunus amygdalus Batsch and Prunus domestica L. plants. Pollens of Prunus amygdalus Batsch ve Prunus domestica L. blossoms are exposed the effect of acidic solutions in order to check pH 6.8 , 6.4, 6.0, 5.6, 5.2, 4.8, 4.4, 4.0, 3.6, 3.2, 2.8 For pollen germination, Brawbaker Kwack medium was facilitated. In accordance with the results gathered, the rate of germination and tube length of pollen for every plant has been affected as much as pH 6.4. The germination of pollen and the length of tube decreased at high rate with ascending acidity. The reduction of the rates were calculated % 93.43 for Prunus amygladus Batsch pollen germination and % 100 for tube length; %93.41 for Prunus domestica L. pollen germination and %99.63 for tube length at pH 2.8.