Possible runt?

Don't grow autos, they are not all that they are made out to be. Grow photoperiod fems, that way YOU control when flowering occurs and only once YOU are satisfied with the plants size. Autos show pre flowers at anywhere from week 2 through to week 6.........but third or fourth week is most common.

I get the pissed off part. Autos have a way of doing it to people lol. I ran autos for about a year. Switched to photos now. Average 1 to 4 ounces per plant with autos. Wether I screwed them up or the genetics weren't that good, but like m0use said, they do what they want. Photos you control. My first run with photos averaged 4.5 oz per plant with slightly longer veg time. One plant pulled 6 itself and I'm still new and making a ton of mistakes lol. Photos are much more forgiving. Takes a bit of the frustration out. Ive recently switched fertalizers and paying more attention to vpd and my girls are really thriving in their soil now. Once you've got a lock on growing photos good start to finish, you can crush what you can get from autos. (Except for Autopotomus, that dude is insane with what he does). Plant looks good, just like others said, slowed for some reason. With photo you could just veg a bit longer and when you want, start the flowering process with the light. Get better yeilds while learning how to set up a healthy environment. Best of luck and Happy Growing!

Boron deficiency can cause dwarfism. If I has to guess I'd say your plant is simply getting too much light at such at such a early stage, 100-150ppfd is all she needs. It very well could be a genetic disposition. Growth is dictated by environmental conditions. Tall fabric pots with airy soil. When you water the water instantly drops to bottom of pot out of reach of tiny roots. Top 2"4" layer evaporates topsoil fast during lights on. Nutrient can only uptake where water is present. If your plant runs out of water solvent to transport nutrient after 2-3 hours of light due to lack of moisture then production stops, growth is limited to that 2-3 hours of production until moisture is no longer within reach. Do your roots get enough air? Do your roots have moisture enough? Have you setup a negative pressure? Have you got correct vpd? Water content In soil is dictated by water in stems which is dictated by water in the leaves. Do you have access to fresh air, if not is there enough co2 for oxygen exchange in the tent? From her growth she looks like she is abundant in everything she needs and has no need to stretch anywhere, growth is slowed due to one of 9 cardinals, which im not sure. Nothing wrong with her I'd say, just slowed growth for one reason or another.

What m0use said.