Lathyrus latifolius prefers consistently moist soil but not waterlogged conditions. Water deeply at the base of the plant, especially during dry periods and flowering.

Allow the top few centimeters of soil to dry out slightly between waterings. Reduce watering in late autumn as the plant begins to slow its growth.

Prune Lathyrus latifolius in late winter or early spring before new growth emerges. Remove any dead, damaged, or crossing stems.

This vigorous climber can be quite extensive, so pruning helps manage its size and encourages bushier growth. Deadheading spent flowers can prolong blooming slightly.

Lathyrus latifolius is easily propagated from seed sown in autumn or early spring. Seeds can be nicked or soaked overnight to improve germination.

It can also be propagated by division of established clumps in early spring, though this is less common than seed propagation.

Repotting is generally not necessary for established Lathyrus latifolius plants as they are perennial and often grown in their final positions.

If starting from seed in containers, transplant seedlings to larger pots when they have developed a few sets of true leaves. Ensure adequate drainage in all containers.