Troubleshooting
Byzantine Gladiolus problems — and how to fix them
Byzantine Gladiolus (Gladiolus communis subsp. byzantinus) is generally low-drama, 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 or heavy soil
Waterlogged soil, particularly in winter, is the primary cause of corm death. Improve drainage with grit, choose a raised bed, or grow in a sunny spot under a wall where rainfall is reduced.
Thrips (gladiolus thrips)
Thrips (Thrips simplex) cause silver streaking and distortion on leaves and flowers, and are the most common pest of gladioli. Check corms at lifting time, dust with an approved insecticide if thrips are present, and store in a cool, dry, well-ventilated place.
Prevent byzantine gladiolus problems before they start
Most byzantine gladiolus issues are care-mismatch, not bad luck. Dial in the basics:
Byzantine Gladiolus problems — FAQ
Why is my byzantine gladiolus corm rot in wet or heavy soil?
Waterlogged soil, particularly in winter, is the primary cause of corm death. Improve drainage with grit, choose a raised bed, or grow in a sunny spot under a wall where rainfall is reduced.
Why is my byzantine gladiolus thrips (gladiolus thrips)?
Thrips (Thrips simplex) cause silver streaking and distortion on leaves and flowers, and are the most common pest of gladioli. Check corms at lifting time, dust with an approved insecticide if thrips are present, and store in a cool, dry, well-ventilated place.