pumpkins dying

:cry:
I planted some pumkins 2 weeks ago and they have started to die.The leaves are gradually turning a silvery colour and drying out,the first leaves to die(about a week ago)are so dry they break up when touched.
These are the first plants I have planted in my garden,the area was previously paved over and had been for about 15 years according to my neighbour.There was plastic beneath the slabs so the soil has been well sealed.I was wondering if this was a contributing factor.
The soil is quite heavy (clayish).
Anyone have any ideas/solutions,
Thanks Andy

 

Sounds like frost damage...

 

Dont know where you live Andy but its probably frost damage.

 

That was quick!
I live in Shropshire.
Has it really been that cold the last week or so.
The big question is, is that it or will they recover.

 

Personally I'd start again.
I doubt any real root growth has taken place and the check in growth will make the plants stall.

It could easily be another month before they actually start to grow.

Pumpkins need as long a growing season as it possible in the UK, so a month of no movement will be a lost month.