Troubleshooting
Common Poppy problems — and how to fix them
Common Poppy (Papaver rhoeas) 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.
Downy mildew
Peronospora arborescens causes yellowing and white-grey furry growth on the undersides of leaves in cool, humid springs; thin plants to improve airflow and avoid overhead watering. There are no registered fungicide treatments for home use on ornamental annuals.
Aphid infestations
Black bean aphid (Aphis fabae) and peach-potato aphid (Myzus persicae) colonise stems and buds, distorting growth; tolerate low numbers which attract beneficial insects, or knock back with a sharp jet of water or insecticidal soap.
Prevent common poppy problems before they start
Most common poppy issues are care-mismatch, not bad luck. Dial in the basics:
Common Poppy problems — FAQ
Why is my common poppy downy mildew?
Peronospora arborescens causes yellowing and white-grey furry growth on the undersides of leaves in cool, humid springs; thin plants to improve airflow and avoid overhead watering. There are no registered fungicide treatments for home use on ornamental annuals.
Why is my common poppy aphid infestations?
Black bean aphid (Aphis fabae) and peach-potato aphid (Myzus persicae) colonise stems and buds, distorting growth; tolerate low numbers which attract beneficial insects, or knock back with a sharp jet of water or insecticidal soap.