Troubleshooting
'Costoluto Genovese' Tomato problems — and how to fix them
'Costoluto Genovese' Tomato (Solanum lycopersicum 'Costoluto Genovese') 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.
Blossom-end rot
Sunken brown patches on the fruit base from uneven watering and calcium uptake issues; keep moisture steady and mulch rather than dosing with calcium.
Late blight
Brown spreading lesions on leaves, stems, and fruit in cool, wet spells; improve airflow, water at the base, and remove affected tissue promptly.
Fruit splitting
Heavy ribbing makes this heirloom prone to cracking after a sudden drench; water consistently and harvest just before full ripeness in wet weather.
Poor fruit set
Flowers drop above 32°C or below 13°C; shade in heatwaves and protect from cold nights to keep pollination going.
Prevent 'costoluto genovese' tomato problems before they start
Most 'costoluto genovese' tomato issues are care-mismatch, not bad luck. Dial in the basics:
- Common tomato problems — the species this cultivar belongs to
- What's wrong with my plant? — the diagnosis apps compared
- 'Costoluto Genovese' Tomato watering schedule
- 'Costoluto Genovese' Tomato light requirements
- Best soil mix for 'costoluto genovese' tomato
- 'Costoluto Genovese' Tomato temperature & humidity
- Full 'costoluto genovese' tomato care guide
Looking for 'costoluto genovese' tomato in general rather than its problems? Read the full 'costoluto genovese' tomato care guide — light, water, soil and feeding.
'Costoluto Genovese' Tomato problems — FAQ
Why is my 'costoluto genovese' tomato blossom-end rot?
Sunken brown patches on the fruit base from uneven watering and calcium uptake issues; keep moisture steady and mulch rather than dosing with calcium.
Why is my 'costoluto genovese' tomato late blight?
Brown spreading lesions on leaves, stems, and fruit in cool, wet spells; improve airflow, water at the base, and remove affected tissue promptly.
Why is my 'costoluto genovese' tomato fruit splitting?
Heavy ribbing makes this heirloom prone to cracking after a sudden drench; water consistently and harvest just before full ripeness in wet weather.
Why is my 'costoluto genovese' tomato poor fruit set?
Flowers drop above 32°C or below 13°C; shade in heatwaves and protect from cold nights to keep pollination going.