Troubleshooting
Spanish snapdragon problems — and how to fix them
Spanish snapdragon (Antirrhinum hispanicum) 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.
Root rot from overwatering
The most common killer of this species. Ensure extremely free-draining soil and never let roots sit in moisture. Raised beds or gravel borders provide the best insurance.
Rust (Puccinia antirrhini)
Orange-brown pustules on leaf undersides. Remove infected foliage immediately, improve air circulation, and avoid wetting leaves. Resistant to many strains but susceptible under humid conditions with poor drainage.
Aphids
Soft shoot tips attract aphid colonies in spring. Treat with insecticidal soap or neem oil. Natural predators such as ladybirds typically manage populations in open garden settings.
Prevent spanish snapdragon problems before they start
Most spanish snapdragon issues are care-mismatch, not bad luck. Dial in the basics:
Looking for spanish snapdragon in general rather than its problems? Read the full spanish snapdragon care guide — light, water, soil and feeding.
Spanish snapdragon problems — FAQ
Why is my spanish snapdragon root rot from overwatering?
The most common killer of this species. Ensure extremely free-draining soil and never let roots sit in moisture. Raised beds or gravel borders provide the best insurance.
Why is my spanish snapdragon rust (puccinia antirrhini)?
Orange-brown pustules on leaf undersides. Remove infected foliage immediately, improve air circulation, and avoid wetting leaves. Resistant to many strains but susceptible under humid conditions with poor drainage.
Why is my spanish snapdragon aphids?
Soft shoot tips attract aphid colonies in spring. Treat with insecticidal soap or neem oil. Natural predators such as ladybirds typically manage populations in open garden settings.