I would say less is more to start with. The instructions on their website say to do between 1/16 to 1/8 teaspoon per gallon. They don't mention anything about 1/4 of a teaspoon, so I'd stick with the manufacturer's recommendation and go from there. Nitrogen is one of those nutrients that cannabis plants love. They love it so much, sometimes it's to their detriment since if there's a lot of nitrogen, the plants will absorb that and will 'forget' to uptake other critical nutrients causing a nutrient lockout. As you're adding Nitrogen, keep a very close eye on your plants to make sure they don't end up suffering from Nitrogen toxicity.
I've attached a photo to show how amazing Nitrogen is. The pic on the right is only 12 hours after adding nitrogen to the plants. I know it's often labeled as gross or dumb or a waste of time, but I use urine for my nitrogen. I dilute it 10:1 water:urine. I've been doing it this way for a long time and you can judge for yourself if it's something that will work for you.