Troubleshooting
Everlasting Sweet Pea problems — and how to fix them
Everlasting Sweet Pea (Lathyrus latifolius) is generally forgiving once you match its basics, but a few issues come up again and again. Here is what each one looks like, why it happens, and the fix.
Powdery mildew
Grey-white film on foliage in dry late summer. Improve airflow and cut back affected stems; the plant regrows readily.
Aggressive self-seeding
It seeds and spreads freely and can become invasive in mild climates. Deadhead before pods ripen to keep it in bounds.
Aphids
Cluster on soft new shoots and flower stalks. Dislodge with water or treat early before colonies build.
Bare, leggy base
Lower stems can go bare as the plant climbs. Cut back hard after flowering or in late winter to force fresh basal growth.
Prevent everlasting sweet pea problems before they start
Most everlasting sweet pea issues are care-mismatch, not bad luck. Dial in the basics:
Looking for everlasting sweet pea in general rather than its problems? Read the full everlasting sweet pea care guide — light, water, soil and feeding.
Everlasting Sweet Pea problems — FAQ
Why is my everlasting sweet pea powdery mildew?
Grey-white film on foliage in dry late summer. Improve airflow and cut back affected stems; the plant regrows readily.
Why is my everlasting sweet pea aggressive self-seeding?
It seeds and spreads freely and can become invasive in mild climates. Deadhead before pods ripen to keep it in bounds.
Why is my everlasting sweet pea aphids?
Cluster on soft new shoots and flower stalks. Dislodge with water or treat early before colonies build.
Why is my everlasting sweet pea bare, leggy base?
Lower stems can go bare as the plant climbs. Cut back hard after flowering or in late winter to force fresh basal growth.