Late outdoor NYDiesCBD Purplebudauto

Second week starting bad. One of the purples died, it's cotyledon have a bad color and eNd dying. Heat started this week getting stronger till 36 degrees. I watered the girls with some pirahna and a little of rooter. I transplanted them to a 7l pot with volcanic stone in the base and bio terra from canna with a little bit of coconut, a spoon of wormcastings and a little bit of wood ashes and dolomite. They are now during the day under an awning and at night i give them a few more hours under a little cfl. I am trying to keep the ph between 6-6.5 but i have the drop test so i am not getting to crazy on that. They are going well except one of the purples that is going slow. I dont know if starting with nuts or not cause the soil probably has a lot and one got a little bit burnt. Regards!