yes, my espoma also has both peat and perlite, but I like more, personal choice. Also if you get to recycling you may find you have too much peat or perlite because they barely breakdown. An auto is going to grow just fine for it's short life in just about any soil you can buy. I wouldn't worry too much about all the trace minerals at first. Making soil becomes a hobby and takes a lot of natures time. That's why I like to make it as far ahead as possible. But I would never postpone planting because my soil is not ready.the plant magic soil supreme does have sphagnum peat. http://www.plant-magic.co.uk/products/soil-supreme/14/
what is a promix brick? I used promix for many years but the bags got too heavy for me.yeah I understand but problem is you have to really know what companies are doing to their soils,such as Fox Farms or nowadays fuxfarms and mant of the bag the sell are wrought with issues from gnats to slamming low PH or even high PH. but yeah i understand what your saying now.
https://www.autoflower.org/threads/beware-of-fox-farms-ocean-forest-soil.34044/
and this goes for most ALL of thew soils they have,and wouldnt suprise me if others are hitting the same wall. thats why I build my own from promix brick and a coco coir brick and a 3CF bag of perlite and some castings then i throw the works into it and cook it. so i know the quality from ground zero as most should and Im assuming you too understand that as well.good deal bro.
what do you mean by small normal cal mag?yeah man, thanks dude, but if you wanna play it easy you could mix with the soil and not the potting holes if you plug or teir plant or anythinf.Id take a fat half of even a full leveled cup and mix with the total of 22 gallons of soil and let mix after the water and stuff is added and passes the squeeze test and let it sit in a tote uncovered for a week or two if you can and that'll do juuust fine,and with a few feeder teas for strain specific and small normal cal mag and auto behavior patterns,imo it'll do fine