Shmuel : A liquid culture medium for pollen would be: > To one liter of water. > Calcium nitrate Ca (NO3)2 ---------------- 300 milligrams (mgr) > Magnesium nitrate Mg(NO3)2 --------------250 mgr > Potassium nitrate KNO3 -----------------------50 mgr > Sugar -----------------------------------------------30 grams > > > > Take a small amount, add the pollen, at 6 hours look with a microscope, > viable pollen there will be formed a polinic tube, you can see with magnification 100x > regards > Fabio F