Most growers over nute at first, too little is usually better than too much. Not sure how long your growing season is, but Ive had best luck outdoors planting seeds direct to soil. Those holes are HUGE, I augered a bunch of mine last year and they were 8" x 18 deep approximately and I got some nice plants in them. Also weed likes warmer soil temps to take off, where I am, near canada/us border, 2nd week in june is a bout ideal planting time to get really nice plants and get them in before it gets too cool out. Also make sure they get direct sunlight for as long as possible, id say at least 8 hours a day.