Dahlia leaves brown and curling

williambone123MoUlCNvn

As the title suggests we've recently brought up some dahlia edinburgh from tubers and noticed that a few of the leaves have resulted in brown spots on the edge of the leaf or in the middle.

Alongside this some of the leaves are curling back on themselves as if hit by a cold spell (no frost forecast in last 4 weeks)

We've recently gave them a potash feed to encourage flowering but wondering if anyone has come across this issue before and what could be causing it?

Fire

It looks those spots might have been fried by the sun or frosted or both. I would pick them off and keep an eye. Water at the base. Frosts can hit even when not forecast if the night temps drop suddenly. It's early days for the dahlias. I wouldn't worry too much.