This is another of those garden tasks which you'd think doesn't need any explanation, but I keep coming across gro-bags with plants jutting out of them, with…
Cultivation
It may need staking. Harvesting may start in Late summer. Harvesting may end in Early autumn. Fairly difficult to grow.
Propagation
Propagate from seed sown in a low mound and thinned to 1 or 2 vigorous vines. Water the roots only.
Pests, diseases or disorders
Slugs/snails, mildew or heavy pruning. Vulnerable to downy mildew.