Cumbers dying?

I planted Burpless cucumbers this spring and have been harvesting quite a few, but it appears the plants are dying. How long do they normally live? They are planted in half-whiskey barrels and grew like crazy and, like I said, have put out a lot. Is it too late to start more from seed and expect more before frost? I live in Toledo, Oh, zone 2, I think
Thanks Jimmy
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
Add image file
Upload is a website for homeowners and building and maintenance pros. It is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.