I believe sperm plugs are a myth, it has been said several times, that those are not sperm plugs, but merely shed from the hemipenes.

can someone with more experience chime in, I know I have read it but I haven't began breeding quite yet, this year will be my first year. But with that being said, I think each male are going to be different, I believe someone has gone early as 450 grams and other won't go at 650 grams. i think it is male specific on when they are able to produce.