Frequency of nutrients. Is twice a week too much? If they can absorb all the water

i'd start every other irrigation or every third... and if in soil, diluted to start and only if you see the lower leaves show a hint of fade. Otherwise, you wait for that to happen, patiently :P irrigate fully, each time.. wait for 1" to dry and repeat... don't try to fit anything to a week or anything else like that. plant dictates all.. at first, you'll be able to stick to a pretty consistent schedule, but it will change over time, inevitably.. and quickly near end. so, feel weight before you irrigate... feel weight after you irrigate. learn that empty and full feeling.. later on the plant won't catch you offguard when it starts drinking significantly more water.