The fact that pollen contains 35% protein and a large percentage of amino acids. Sugars and fats , make it difficult to digest

@ Elham Hamid Al Rawee

The question is on flowering management in mustard, not on concentration of nutrients in pollen grains of mustard plants and their digestibility.

Thanks!

For production, it is better to use cultivars with delayed bolting at summer time, like some Japanese varieties ( https://www.jstage.jst.go.jp/article/jsta1957/41/3/41_3_195/_pdf )

For research purposes you can try genetic modification like described before in Article Tuning growth cycles of Brassica crops via natural antisense...