del.. you are 99.9% correct. There is a small percent that will not show early but it's so small I don't waist my time either. The question was "does it work" and there was some incorrect information that needed to be corrected.

Just get a 10x mag glass like del.. said and you should be fine. Have you seen pictures of what a male and female look like in early stages?
Zandor Reviewed by Zandor on . Sexing tip Hi all, All the advice I've seen so far (yes, I'm still a newbie so I'll no doubt get flamed that everyone has been doing this for years :) ) on sexing by covering a lower branch has recommended lightproof paper, tubes or a paper bag. Not having ready access to any of those I had to rethink. Am I the first to spot a new use for cooking foil (Bacofoil this side of the pond) here? A 12" x 12" piece moulds nicely around a lower branch without causing any damage and it stays in place on its Rating: 5