Troubleshooting
Calypso Cilantro problems — and how to fix them
Calypso Cilantro (Coriandrum sativum 'Calypso') 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.
Bolting in heat
Even with its enhanced bolt resistance, 'Calypso' will run to seed in sustained temperatures above 28°C. Use shade cloth, succession-sow, and mulch roots to keep soil cool.
Root disturbance failure
Cilantro has a taproot and transplants poorly. Sow directly into final position or use biodegradable module plugs to minimise root disturbance at planting.
Leaf spot (Pseudomonas / Alternaria)
Brown or yellow spots on leaves, more common in wet conditions. Improve drainage, avoid wetting foliage, and rotate cilantro away from previously affected beds.
Prevent calypso cilantro problems before they start
Most calypso cilantro issues are care-mismatch, not bad luck. Dial in the basics:
- Common cilantro / coriander problems — the species this cultivar belongs to
- What's wrong with my plant? — the diagnosis apps compared
- Calypso Cilantro watering schedule
- Calypso Cilantro light requirements
- Best soil mix for calypso cilantro
- Calypso Cilantro temperature & humidity
- Full calypso cilantro care guide
Looking for calypso cilantro in general rather than its problems? Read the full calypso cilantro care guide — light, water, soil and feeding.
Calypso Cilantro problems — FAQ
Why is my calypso cilantro bolting in heat?
Even with its enhanced bolt resistance, 'Calypso' will run to seed in sustained temperatures above 28°C. Use shade cloth, succession-sow, and mulch roots to keep soil cool.
Why is my calypso cilantro root disturbance failure?
Cilantro has a taproot and transplants poorly. Sow directly into final position or use biodegradable module plugs to minimise root disturbance at planting.
Why is my calypso cilantro leaf spot (pseudomonas / alternaria)?
Brown or yellow spots on leaves, more common in wet conditions. Improve drainage, avoid wetting foliage, and rotate cilantro away from previously affected beds.