[Lizum]

Last year I grew my potatoes throgh black plastic. Can I re-use it or am I just heading for a blighty mess?

[DD.]

Did your potatoes have blight?

Have you left it in situ over infected tubers?

If you've removed it, it cannot harbour blight as plastic is not living plant tissue.

We need a bit more information.

Welcome to the forums, by the way!

[Lizum]

I'm not sure if they got blight or whether the leaves just died off naturally as I didn't have time to dig them all up.

It's still down where it was.

[DD.]

Then your problem may lie underneath the plastic, rather than the plastic itself.