I've used the recipe in Brewbaker and Kwack in my undergraduate course to
germinate freshly collected pollen.
Brewbaker, JL and Kwack, BH. 1963. The essential role of calcium ions
in pollen germination and pollen tube growth. Amer. J. Bot. 50: 859-865.
Hope this helps.
Dept. of Botany
tpowe at conncoll.edu