Potato leaf tips turning yellow?

[chris]

Does anyone know why this is?

Have a few rubbish camera phone pics attached, light was dropping so the colour match & quality is poor. It only seems to be my main crop spuds (Maris Piper) & my Rooster.

They're all growing in planter bags on my decking, all near each other.

TIA!

Edit: slightly brownish yellow on a couple leaves..

[selfraising]

Looks like scorching to me from the hot weather.

[tattieman]

Probably windburn when the end of the leaves go like that.

[chris]

Thanks both.. the decking is pretty open, the sun beats down on it all day and I did water them one morning when the sun was on them, though did try to be careful not to spash the leaves.

cheers.