Cheers Dr , saw your hashberry pics and well impressed.
The undead males are just about to drop pollen and will be bent over/broken into a plastic bag to collect a small amount of normally viable pollen.
They can take a month to get to this stage but if a few fan leaves are left on it usually works with plain water , add a tiny drop of nutes sometimes but see little difference.
These have drank over two litres since being chopped and look very healthy all things considered.
Intend to use some of the pollen on the best of the females to give me something to grow out over the late summer looking for something interesting , take the best few indoors to finish .
Done this a few times and around one in five of the seed are significantly better than the keeper from the first run and very few are worse.
Have no pretentions as any kind of breeder and this is a very poor method but works well for me and have found a few stunners along the way.