It is bad soil and outdoors.. and this is where autoflowers are really separated from photos.they don't get bothered with light leaks when lights off indoors,they need light to grow big.simply your area is not very sunny,it can't get enough light and energy,when it is combined with a soil like this,this is the result.but still,it looks healthy and green.just a little bit pale,because ot the soil quality.it looks to be not letting roots to get air,also its ph is not regulated what makes it hard to control the growth.many premade soil mixes for cannabis growing are rich in nutrients and designed to grow it.since it is already in flowering and bud is coming,transplanting won't do magic.what you can do is to lower the ph of your soil.acidic elements would do the job but I don't think it would be a permanent solution.I have a different sounding advice for you to drop the ph; use bottled nutrients if you have some.add a good base bloom nutrients and some calcium/magnesium,feed for a few waterings in a row,this will help you drop the ph.simply you should be looking for some salt buildup in your soil which will definitely lower the ph in soil.try it and update again please.wish you better grows in future mate.