it wouldnt work!to much hassle,thats why ppl dont do it!you should use pollen straight away!yeh you can freeze it but its not recommended!plus you'd have to deliver it by hand to garuantee freshness!if you shiped it how would you keep it frozen?if you sent it by royal mail for example they might store it somewhere hot which would cause condensation in the jar or bag which would ruin the pollen!it would cost too much to package and be hassle to keep fresh!its much easier to make your own strain of seed.