Troubleshooting
Marsh Afrikaner problems — and how to fix them
Marsh Afrikaner (Gladiolus tristis) 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.
Corm rot in wet winters
The corm rots readily if kept wet while dormant. Grow in a pot that can be brought under cover after flowering, or lift corms in June and store dry until autumn replanting.
Gladiolus thrips
Taeniothrips simplex can disfigure buds and leaves. Check corms before planting and dust with an insecticidal powder; destroy badly infested plant material rather than composting it.
Failure to flower
Most often caused by planting corms too shallow, insufficient sun, or excessive summer moisture disrupting dormancy. Ensure at least 10 cm planting depth, full sun exposure, and a dry summer rest period.
Prevent marsh afrikaner problems before they start
Most marsh afrikaner issues are care-mismatch, not bad luck. Dial in the basics:
Looking for marsh afrikaner in general rather than its problems? Read the full marsh afrikaner care guide — light, water, soil and feeding.
Marsh Afrikaner problems — FAQ
Why is my marsh afrikaner corm rot in wet winters?
The corm rots readily if kept wet while dormant. Grow in a pot that can be brought under cover after flowering, or lift corms in June and store dry until autumn replanting.
Why is my marsh afrikaner gladiolus thrips?
Taeniothrips simplex can disfigure buds and leaves. Check corms before planting and dust with an insecticidal powder; destroy badly infested plant material rather than composting it.
Why is my marsh afrikaner failure to flower?
Most often caused by planting corms too shallow, insufficient sun, or excessive summer moisture disrupting dormancy. Ensure at least 10 cm planting depth, full sun exposure, and a dry summer rest period.