At week 5 veg, 65 to 70 will survive but will have metabolism faster at 75f.
https://www.google.com/amp/s/hightimes.com/grow/nicos-nuggets-temperature-plants/amp/
In hot summer vegas acquainted vegging plants hit 85c soil but healthy plants in oxygenated coco fabric media will have much lower leaf surface temps…so get a laser thermometer too.
You can also buy some cheat codes that most havent heard that are natural to aid a plant thats not in perfect environments.
Salycilic acid, Triacontanol, kelp extract, baculus d747, chitosan, citric and malic acids, mycos, amino acids (it’s just cheap soy hydrosolate), humic acids, fulvic acids, silica, vitamin c, and good old sugar will aid in immune response, better co2 fixiation, better high or low temp tolerance, overall vigor, etc.
There’s tons of studies for all of the above.
Dr. Earth has tons of microbes in it already. If fed Aminos they will become PGPRB.
Natural soil will have aminos and some of those acids but it only makes some hippy vegans feel better about themselves or give them nostolgia about guerilla grow days, not give you the best results.
Keep your coco wet.
Throw your autos out in the trash or use them as perimiter honey traps for bugs.
They can be replaced with a timer, or light dep if you use Sunrise and sunset times in Las Vegas correctly.