Might be helpful

https://www.youtube.com/watch?v=-uv9zI03UGo

Are you referring in vitro or in vivo pollen germination?

You can try 10% sucrose + 10-100 ppm boric acid solution and try “hanging drop method” for in vitro pollen germination.

Dear Tashinga Donemore Mudzengi;

Try a media made with agar, water boric acid (10mM) and sucrose 10g .l-1).

It works well for a number of species.

The collection point of the pollen is also important, as the storage of it in good conditions of Moisture content and temperature!

Regards

Nelson