Yeah, heat stress can be a pain because sometimes the symptoms make you thing you've got other stuff going on.

Try Silica Blast which has Ca and Si in it.
stinkyattic Reviewed by stinkyattic on . lots of brown spots on leaves?? Hiya Folks and greetings from the hot and sunny Netherlands, Last week in growth of my five outdoor plants and one of them is showing some odd brown discolouring on its leaves. More and more leaves are affected every day and I'm a bit worried what might cause this. Hopefully some of you can shed some light on this problem! Many thanks, Happy C Rating: 5