In my experience autos don't like the same nute schedules as photo period plants. If you use the rec dosage chances are you'll burn your plants. Start with 1/2 the rec dosage, move up slightly if you burn them flush and back off. I use Fox Farms so I can't really tell you how to use yours but that know that if you use 1/2 and work your way up you'll find a happy medium that works for your garden. Good luck.