Troubleshooting
Flame nasturtium problems — and how to fix them
Flame nasturtium (Tropaeolum speciosum) 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.
Failure to establish or return after winter
Most common in alkaline, dry, or south-facing warm soils; the tuber desiccates in summer heat — cool, acid, humus-rich soil with the root zone in shade is non-negotiable.
Aphids and whitefly
Both pests are attracted to the soft new growth; treat with insecticidal soap or introduce natural predators such as ladybirds.
Virus diseases
Mosaic virus causes mottled, distorted foliage and is spread by aphids; remove and destroy affected plants promptly and control aphid populations.
Prevent flame nasturtium problems before they start
Most flame nasturtium issues are care-mismatch, not bad luck. Dial in the basics:
Looking for flame nasturtium in general rather than its problems? Read the full flame nasturtium care guide — light, water, soil and feeding.
Flame nasturtium problems — FAQ
Why is my flame nasturtium failure to establish or return after winter?
Most common in alkaline, dry, or south-facing warm soils; the tuber desiccates in summer heat — cool, acid, humus-rich soil with the root zone in shade is non-negotiable.
Why is my flame nasturtium aphids and whitefly?
Both pests are attracted to the soft new growth; treat with insecticidal soap or introduce natural predators such as ladybirds.
Why is my flame nasturtium virus diseases?
Mosaic virus causes mottled, distorted foliage and is spread by aphids; remove and destroy affected plants promptly and control aphid populations.