This is my first auto plant experience, I need some help.

What are you worried about?? ...........except that they are autos!

Looking at your week four pictures you are doing great with them. Autos will explode in size the first weeks into flower. Often time you can expect double to triple the size. I LST my autoflowers down to expose the most nodes to light. By the end I will have 8 huge colas. Autoflowers are defiantly a shorter grow. Typically you can expect flowering to last around 6 weeks and a vag time of 3-4 weeks giving you a total of under 10 weeks from start to finish. If you are trying to pump out many strains in shorter times this is a good way to go. Another upside to autoflowers is to grow them outside. Since they will start flowering automatically you can put them out in June and harvest in August. This gives them the best sunlight and temp/humidity ranges. Typically photoperiod plants outside take till early October to be ready and you can have an 8 foot tree in your back yard. I think you will be happy with your results, just give them some extra time to fill out. Hope this helps.

Dude your plants look healthy and are the size they should be for the age. Within the next 10 days they are going to start flowering and your going to see a massive change during the 1st 2 weeks of flower. Personally I'd be happy if I was you and let them do there thing and not scrap them off.

Don't grow autos. That's my tip. The only thing different about them is some mixed in ruderalis genetics (net-negative) and it is not a photoperiod plant. 99.9% the same. plant growth is exponential up to some limiting factor. People confuse stretch with a normal 4+ weeks of stem and leaf growth that remains after flip to flower. A plant should 2x or 3x in size given 3-4 weeks... it's not faster than before. Your environment, fertilizer, light and genetics etc will determine growth rate. An autoflower is just triggered to enter flower phase in a non-visible way. when you see preflwoers, figure it entered flower phase 7-10 days prior. From there you can deduce a rough estimate of "vege phase" ... and you'll see over time this is the same resulting size of plant if you did the same vege phase length with a photoperiod... given wide range of genetic variance. you just don't have to worry about uninterrupted darkness with them. I also believe the suggestions that say 1/2 the fertilizer are coming from people that over-fertilize. as far as a soiless/hydro context it's no less than 90% if not 100% of normal concentration and ratios of nutrients... seems more like typical volatility of any marijuiana seed.

Autoflower plants don't explode in size till they stretch. I read you were thinking of starting over. That is not recommended. In 3 weeks those plant will be pushing double if not triple the size. Be patient. Apply training more. I lst my autoflower plants in most of the vegging stage. I also get QP to HP dry yields on most in full size potters. Good luck and be patient.