Marrows In Meltdown?

Have recently planted three marrow plants into a manured plot (was added and has been dug well in since beginning of April). Despite being watered during dry days, and nourished by recent rains the leaves are looking pretty damaged. Would appreciate any advice thoughts what's going on, or is that usual for marrow?

It is a fairly exposed and a wind prone plot,  and seems the past weeks each day it has been blowing  non-stop.

Definitely looks like wind chill.

I put an 18 inch high debris netting screen around mine, and they are doing fine 

It just keeps the wind down enough by the looks of it 

I put a morrow out about three weeks ago and it's done exactly the same. I would concur with the wind chill notion. It's slowly getting over it now.