could just be the strain , also alot of other things need to be taken into consideration too . have the seeds crossed any international borders ? i've had friends that have gotten seeds from the same source and gotten 100% germ rate 1 time and 0 the next . i've been told that if border patrol is at all suspicious about a pkg or piece of mail they can either xray it or microwave it for a brief sec. both of which will kill your beans .
peace