Not topping autos used to be a no-no but not any more. The following thread (and my own experience) confirms that.
Good day growers im a master photo and auto grower.but my passion is with autoflower seeds.i been on a mission for 5 years growing now trying diffrent methods of training on autos to see what they truly behold.truth is autos aint no diffrent to a normal plant other than they flower on there...
www.autoflower.net
Here's an easy feed schedule for autos.
Heres a nice easy feeding schedule with very few ingredients that can grow big plants...... all you will need is a good light soil mix,I've developed this with Plagron Light so that's what I would suggest, a reasonable water supply, mine is PH7.4 and EC 0.4 most tap water will be around this...
www.autoflower.net
If you're serious about growing autos, you should really join the AFN as a lot of people here on RiU pass on some bad info on autos.
The Home of Autoflowering Cannabis
www.autoflower.net
Good luck!