When to pot on my cucumber?

[Penellype]

I put a ring of pop bottle with copper tape round each stem when I plant out (from 9cm pots) - I then water outside the ring, which stops the stem from getting splashed, and the copper hopefully keeps the slugs off.

[goosander]

Have lost a lot this season. Doing fine then next day one keeled over and another lost its head.
Going to try what others here have done.
Thanks for the advice.
Bob.

[Babru]

Thanks to you all for your sage advice. I've potted the plant with the most roots showing to an intermediate pot, gravel on the top and a paper collar for sciarid protection. It's been back under the growlight for a couple of days and seems so far unscathed. Second plant has its paper collar and I will plant into a much bigger pot when the time comes.

One will stay in as a houseplant, one will go into the greenhouse.

Looking forward to some tasty cucumbers this summer, and with two plants, hopefully enough to share.