Posted: 06/09/2013 at 06:10
They're in the greenhouse, aren't they? Mine are in the ground. I water about every three days but very very very deeply. The roots are driven down deep into the soil away from the heat near the surface.
They're very high temps for a greenhouse because the heat is even more intense in the enclosed environment, even with ventilation. So you have a bit of a vicious circle in place. For the future, it's probably worthwhile trying to keep the temps down.