ENJOY those blossoms and the fantastic fragrance - CONGRATS! When the yellow/orange pollen becomes powdery and can be removed, place a good bit of it on the top of the central sticky portion (the Pistil) of the flower. This can be done with a small artist's brush or even with something like a tooth pick. taking some of the pollen from one flower and putting it on another is another good strategy and you can do that as you have a couple of blooms that opened on the same day. Very happy that you are having such fun with your citrus success!