I grew lemon skunk on my first grow..Good yeilding, nice tasting, lemon head scent...Here she is late flower..Dont remember when but maybe 5-6 week flower.
Could be...How long are you leaving them? Some seeds can take up to 2 weeks to germinate..
I place my seeds in a shot glass and place on a heating pad..Ive have a few pop on less than 12 hours but some take about 3 days