Longer veg cycle

You can't, they flower by themselves

Grow photoperiod plants instead, that way you can veg as long as needed and YOU control when flowering occurs.

Well autos are wired to flower is true. I have prolonged vegging on many grows. It happens for me due to aggressive lst, and select defoliation. I imagine substrate can play a big role in it as well. I use coco and perlite.

When you grow autos unfortunately the vegetative stage only tends to last for the first 5 weeks or so. After that, the autoflower genetics initiate the bloom stage. There is little that you can do to control the vegetative stage with autoflowers.

There is no way to do that... all autoflowers have their own timeline built into them and if you screw that up in any way, they aren't going to produce for you. Best to grow a photoperiod if you want to prolong veg for whatever reason... Sorry!

Perfect environment and care, that will push any auto to max limits. 5-6 weeks veg is easy with most strains if you have nothing else to do except growing ;)))

Not really a way to prolong it. The way autos work is they are genetically coded to flower after a certain time period. You can speed it up but not prolong it. But so they veg the longest keep them in and 18/6. You can go 24 with the lights on but I haven't had too much success with light on all the time