I live in CO weed will germinate at 33 degrees. The stuff about temperature is BS.... The temp variation here is 30 degrees day/night. U have to know what kind of soil u have....... I made so many mistakes causa that. I'm a stubborn bastard who doesn't deny reality. Here the soil is a bit different all over. Mine has high Ca which means the PH is to low. To cure it add compost. Compost lowers ph. Long story short if other plants grow then weed grows without adding anything. Remember the sun is more powerful than any light. I let my plants outside into late Oct. the temp can go down to 28 degrees in fall fan leaves drop. the best time for resin prod is the 2nd week of October..... YOU have to pay attention even if u are stoned. I planted a plant from a QT container in late June it was 8 ft last week. Most roots are at the surface so water everywhere u are not in CA they do things different. This year my plants are flowering 2-3 wks early maybe because I held off on the N. There's always something. DONOT BELIEVE WHAT U READ. MOST OF THE BOOKS ARE BASED ON BS. WHICH PART IS CORRECT ?
I agree with some of what you said. yes cali growers do it differently and Co growers will have to do it different then us. Everyone has different climates and humidity. The great lakes cause odd weather for us.
I sprout mine in Feb but can't put them out to early. I've lost plants due to first frosts. Yes they can survive many late frosts as long as it isn't hard frosts.
As far as ph goes..... it's not about just growing weed... it's a plant of course it will grow. It's about pulling as much yield as possible from each plant. Too high or too low of ph will cause nute lock out.