Mine grew to about 20feet long last year, trying the same again

...

..

.

You shouldn't have pumpkins plants in a balcony. It will be your worst summer.

Believe me, depends in the pumpkin, but those fuckers growth 30+cm in one night.

If you really want it you need a good garden

Good luck, looks pretty 😍 pumpkin jungle?! 🎃🪴