Most commercial almond cultivars are self incompatible, therefore cross pollination and fertilization are important factors in production and harvesting a good crop. Since seed is considerates as the main product of almond trees, therefore fertilization and viable and compatible pollen play an essential role in this process. To find the effect of culture medium type for pollen germination, four different media were used. This experiment was carried out during 1996 in college of agriculture, university of tarbiat modarres. Results of the expriment indicate that the percentage of pollen germination are widely in different media. The highest germination percentage of pollen (94%) was observed in basic medium with 10% sucrose and 2% agar and the lowest pollen germination (22.68%) was found with 10% sucrose and 1.5% agar (basic medium i.e. Calcium nitrate 100 ppm; Magnesium sulphate 200 ppm; Potassium nitrate 100 ppm). The best temperature for almond pollen germination in early pollen age is 20 .The pollen age, environmental conditions and the media type are considered of significant effect o\f pollen germination.
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