I've been growing outdoors in the desert for over 20 years now and have never had a problem from the high temps here and it's over 100 for months at a time and often over 110! I only give them more water...not a lot at once but a moderate amount 3x's and sometimes 4x's/day and they're fine. They all grow huge and the extra-long growing season gives even the longest flowering time strains a chance to fully ripen.