We need to know the specifics of your grow. Which medium are you using? Which nutes, if already purchased? Which light? A pic would be nice too.
@Xaluti yea you can use it from seed to flower but its a bit like us taling a multivitamin- it will help our diet but we need protein carbs and fats from real food.
If you hadnt already planted i would advise biotabs. Theyre slow release tablets that feed plant meaning all you have to do is give plain water.
The choices of nutrients are huge- common ones on here would be biobizz, ghe, advanced, remo, canna, green planet etc.are there any growers on here whos results you like? Just copy them and their schedule.
Whatever you decide we'll help you make a good feed schedule