dont trim anything let them be,they have enough stress. from seed about 2 months,then u flip to 12/12 for an aditional 2 months. ph in soil should be 6.5,do a run off test to make sure thats what is coming out the bottom of the planter.if u want u can grow those seeds out for 2 months and take cuttings of them.when your cuttings get roots and are older than 2 weeks u can flower those in a seperate room 2 make sure they are female,plus if u keep a mom u would only have to veg your cuttings for one month and flower for 2. its saves u a month starting from seed and u will have an exact replica of your mom.