light leak?? you've answered your own question. light stress during the dark period will make male flowers. so will unstable genetics. so many times, so many strains have I seen hermis. my theory is that seed companies are selling some unstable and unreliable genetics. more so in Canada... although not to exclude the Dutch from having unstable strains on the market as well. if you femenize a plant by means of stressing it by light or environment or giberellic acid(yikes!) won't the genetics that follow carry that same hermi trait and produce an unstable variety with male flowers? keep cannabis pure and natural and go with quality genetics from reputable suppliers. once a herm always a herm. if you take cuttings from a herm plant your clones will be herms.
