Thats the best dam cell phone picture I've ever seen and a beautiful plant. Good work! :hippy:
For fertilizer, buy some Fox Farm big bud organic fertilizer and follow the directions on the bottle to mix up a gallon or two depending on how many plants you have, then water them well and only give them more fertilizer every couple of weeks. You want to stop fertilizing before the plant is harvested though so you dont have any chemical-fertilizer taste to your nugs. Flush them with distilled water to maintain a healthy pH and then harvest when the trichomes (the crystals on the plant) turn cloudy/amber colored. Rule of thumb is usually if 50% or more of the trichomes are amber or cloudy and no longer clear, then its time to harvest!