first time auto

The shortest vegetation stage I have EVER seen!!!! Popped the first true leaves 14 september and this pic was shot 12 october. I was away for 3 days and I got home to this. And immediately started showing calcium deficiency. Up till tis time I was giving them a solution of 12/5/12 plus micro elements since I have farmers in my extended family and I use the commercial s**t they use customised to my plants needs. I mix them with water from my RO system and a couple drops of vinegar for that tasty 6.5 PH. I also did a stupid mistake. One plant has her own bag but I left the other two sharing the other one. Big mistake!!! Auto flowers behave like parasite weeds in the wild. They release a stream of surface roots to strangle any other plant threatening to their existence (dog I love parasites) and so the are left in a quite smaller stature. I should have done my research before saying the immortal words ''what can possibly go wrong''. Anyways Im changing my feeding to something like 12/5/24 plus calmag as we enter the flowering period. I have done a very careful opening of the branches so that all buds have a more or less even light and air but nothing more stresing because autos dont have time to recover and dog forbit you do a trimming on them... but it is what it is. Keeping the temperature under 28 has been a bitch untill this point, but from now on theyre getting full power 24/7.