jawbrodt brings up a very good point. you dont really want to cover leaves or nodes.
but my advice to you is,
next time you transplant a plant use the ENTIRE pot and not 70-80% of it. you will have more vigorous growth due to a larger root mass.
if you think about it your robbing your plant of 3 inches deep by 12inches wide squared. (my assumption by your pictures pot size)
and if you talk to anyone who knows their stuff. the bigger hole you dig, or more root mass you have the bigger the plant will be and the more it will yield.
for example i yield 28 grams roughly from one gallon pots. but yield about 45 grams per plant in 2 gallon pots with the same exact veg time.
just my .02C