JM brown/dry leaf tips.

[fredman]

My Osakazuki (grafted) has dried out tips on it's leaves and i'm trying to find the cause. The most common cause from what I know, is over watering...but it's the only one that shows this, and I water all the maples the same. Fertilizer is organic fertilizer cakes and fish emulsion.
Any ideas plz?

 

[Firstflush]

How is the sun exposure and have you had a warm spell recently?

 

[fredman]

I'm keeping them in dappled shade. I'm in NZ... only cool spring weather so far.

 

[fredman]

How is the sun exposure and have you had a warm spell recently?

Ah thanks for mentioning that. Just remembered I had rainy weather for about ten days and I put it in the cold frame (plastic cover). When the sun appeared it spent two days in there and it must've over heated. The heat accumulates pretty quick in there. That must be it...

 

[Firstflush]

Sounds about right. Forgotten about cold frames will fry stuff for sure.