My 1st blooms are opening and I feel like dabbing pollen. I’ve go some 1 year old and 2 year old frozen pollen. Is it likely the two year pollen is still viable?
If you have a microscope you can test it. A droplet of a 10% solution of deionised water and cane sugar kept at 100% humidity for an hour gives a reliable measure for me.
I have just tested some 6 month old pollen that has been out of the freezer for over a week and that still has some viability. I understand that keeping the pollen dry is important so if you take it out of the freezer and expose it immediately then it is unlikely to last long. I keep my pollen in gelatine capsules and store them with a desiccant. Bringing the capsule to room temperature with a desiccant before opening is probably worthwhile.
I’m sure in the past I’ve had pollen that has had some viability after 2 years.
Lawrence, I’ve used pollen from the freezer up to three years. Best at one year but even 2 or 3 years seems OK if the pollen is used rapidly when removed from the freezer. Here, for me, with my haphazard storage, viability drops quickly when it thaws. I store in dark brown, wide mouth, glass medicine bottles with wide mouths. Also add a desiccant (silica gel) packet and tighten lid firmly.
Hi Bill,
If you have a microscope you can test it. A droplet of a 10% solution of deionised water and cane sugar kept at 100% humidity for an hour gives a reliable measure for me.
I have just tested some 6 month old pollen that has been out of the freezer for over a week and that still has some viability. I understand that keeping the pollen dry is important so if you take it out of the freezer and expose it immediately then it is unlikely to last long. I keep my pollen in gelatine capsules and store them with a desiccant. Bringing the capsule to room temperature with a desiccant before opening is probably worthwhile.
I’m sure in the past I’ve had pollen that has had some viability after 2 years.
Lawrence, I’ve used pollen from the freezer up to three years. Best at one year but even 2 or 3 years seems OK if the pollen is used rapidly when removed from the freezer. Here, for me, with my haphazard storage, viability drops quickly when it thaws. I store in dark brown, wide mouth, glass medicine bottles with wide mouths. Also add a desiccant (silica gel) packet and tighten lid firmly.
Steve