Whats the Best soil mixture for autoflowering

50% perlite 50% coco canna coco a&b rizotonic superthrive blackstrap molasess or canna boost if ur rich $ @.@ , for auto's short life cycle differnce of boost compared to blackstrap molasess is negligable imo 2-5 gallon smart/fabric pot ph water 5.8-6.1 only 1/2 strength rizo an superthrive from germination full strength from1st tru leaves for 5 days then use cannna lite feeding chart on their website weeks 1-3 , week 4-5 build up strength 75% closer to normal feeding chart then week 6-8 follow the normal feeding add 1 tb spoon molases per 5 gallons water , week nine last waterings before flush molasess only , 3 day sledgehammer flush ph water only 24hrs apart , 3 days of darkness then harvest easiest simplest auto guide works every time its so idiot proof my own 71 year old mother had no problem growing 2 1 1/2 oz auto assassin in the corner of her retirement villa late last year forget soil with auto's an auto's potential is determined largely by days 1-18 going hydro with coco gives you massive yeild % increases in autos , you can hand water just like soil , theres no reason to use soil over coco for auto's if ur hell bent on a soil mix go sunshine mix #4 with house an gardens soil nutes an follow the same theme of the ruff coco guide hope it helps peace