Do you water like that all the time, or is the soil starting to dry-out? (the plant in the cut-down bucket where it looks like you only watered around the base of the trunk)
If you are not watering the entire rootball at least once a week, you just aren't watering enough.
Sativa's require lower nutrient dilutions, or they will burn. (yours on on the border) Leaf margins will start to show burn damage if slightly over fertilized. Does more damage and death if way over fertilized.

Irridum makes a good point. This isn't a hit-n-miss type of learning. You can slip into a myriad of bad habits by using guesswork as a strategy.
If you don't know...ask. :thumbsup:

You'll need some patience, too. (every gardener needs more patience) They had some at Walmart last week, but not sure it's still in stock. :jointsmile:

Print and use the weekly feeding schedule by Fox Farms. It's available on their website. The online schedule won't let you down. The soluables (on the weekly feeding schedule) are for those with more experience, and should be avoided till you get a good grasp on growing successfully.