You can find here many detailed grow logs.
Nutrients in soil can go for whole plant life. Depends on soil mix. Some are fully filled, and they release the nutes when plants really need them. For that kind of soils no need additional nutrients during the growth. Or can be aded just a little if plants really need. Some are just for first three weeks of vegging stage. Usually enough for vegging (last for 1 to 3 weeks, depends on your plants.) Adding nutrients on that kind of soils usually starts after second or third week.
Don't touch the leaves, plants need them.
boards.cannabis.com all you need.