Remove the seed from the capsule, fold it into clean,white, smooth paper, label it and place in a glass container, place on top shelf of refrigerator, not the freezer. F80-158
Silica gel and calcium chloride as dehydrants drastically reduce the viability of pollen; if stored at 45 deg.F. it retains its viability better than at 72 deg.F.; much variability in longevity of species even in the same genus; some will keep a year if properly prepared. A69-388+
The relevant temperatures are all-important; at 40 dF (4 dC) it loses its viability in six months; at 75 dF (25 dC) in three months, but at minus 79 dC it can be stored successfully for almost three years. Hort. revs. 1983-290
Use small medicine capsules; place flakes of pollen inside and label with the plant name and date; place in freezer. OD67-154