I assume you are talking about outdoors. If not sorry but you could try to dig a deep hole/well to place the plant pot down in and let the plant stretch out of the hole. If you can keep the roots cooler, they should cope better. If that doesn't add up, you could also try shading the area around the plant roots with a cover crop.
Edit- sorry Now I see you are in the indoor section.
Too many variables on that one.