Read the post I just added. Also, these are seeds I got from someone who grows and sells me pretty decent bud. Not sure about the genetics, but they look pretty healthy.
Well if that soil doesn't contain that gradual release neuts it should be ok, it can be done with gradual release, in the end it's a plant, problem is exact amount of crap they put in and if you add anything good it could lead to neut burn.
Seedwise, if u not sure if auto or normal, well usually auto show signs that they can flower within 4 max 5 weeks usually and if Auto it will probably be ready for harvest around 1 month and a half later for most strains.
EG WW Auto might be 60 day life cause it's genetically modified, so usually it takes 3-5 weeks veg then starts to flower, basically in most cases split the time in half to see phase, but just by looking at them you will notice the difference. If normal strain then it will stay in veg for 2,3 even 4 months in some cases, in reality a non Auto could be kept in veg for 10 years according to studies
imagine that
So basically if after 2months no signs of flower development then it's probably a normal strain
Even if you give the same light on good Autos, due to genetics they will pop a bud, average long for me in veg was 6 weeks but i do a constant 20/4, i let it decide when to change, some might go 24/0 with an Auto this also works fine, they are more robust and built to be pushed to the limit.