Troubleshooting
Masked Twinspur problems — and how to fix them
Masked Twinspur (Diascia personata) 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.
Powdery mildew
Occurs in hot, dry summers particularly on crowded plants; improve air circulation and avoid overhead watering to reduce incidence.
Crown rot in wet winters
Despite its relative hardiness, persistent winter wet causes crown rot; ensure sharp drainage and consider applying a grit mulch around the crown in autumn.
Prevent masked twinspur problems before they start
Most masked twinspur issues are care-mismatch, not bad luck. Dial in the basics:
Looking for masked twinspur in general rather than its problems? Read the full masked twinspur care guide — light, water, soil and feeding.
Masked Twinspur problems — FAQ
Why is my masked twinspur powdery mildew?
Occurs in hot, dry summers particularly on crowded plants; improve air circulation and avoid overhead watering to reduce incidence.
Why is my masked twinspur crown rot in wet winters?
Despite its relative hardiness, persistent winter wet causes crown rot; ensure sharp drainage and consider applying a grit mulch around the crown in autumn.