Dude haha....I
always suggest topping
and LST haha I will drop you a tag to my thread after I write this hehe......I mix my nutes in a bucket and just pour it on top with a jug until I get about 20-30% run off, I think this way is called Drain to Waste watering(or DTW for short!)and the way I check if they need some feed is I just lift the pot dude....if it's light, feed 'em.....if it's heavy....don't haha....it's important to let the roots grow out and look for the feed, so you get a good, big root system going.....you are doing great dude, keep it up....
Edit:.... sometimes dude, when they are small, I put most of the feed around the edges, to encourage the roots to grow out to seek out the moisture/feed...