Troubleshooting
Beatrice Watsonia problems — and how to fix them
Beatrice Watsonia (Watsonia pillansii) 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.
Frost damage to foliage and corms
Although hardier than most Watsonia species, severe frosts below -5°C can kill the corms; apply a thick mulch of straw or well-rotted bark over the crown in late autumn in colder UK gardens (USDA zone 8).
Red spider mite under glass
Plants grown in a conservatory or greenhouse are prone to red spider mite (Tetranychus urticae), which causes pale stippling on leaves; increase humidity, mist foliage regularly, or use biological control with Phytoseiulus persimilis.
Prevent beatrice watsonia problems before they start
Most beatrice watsonia issues are care-mismatch, not bad luck. Dial in the basics:
Beatrice Watsonia problems — FAQ
Why is my beatrice watsonia frost damage to foliage and corms?
Although hardier than most Watsonia species, severe frosts below -5°C can kill the corms; apply a thick mulch of straw or well-rotted bark over the crown in late autumn in colder UK gardens (USDA zone 8).
Why is my beatrice watsonia red spider mite under glass?
Plants grown in a conservatory or greenhouse are prone to red spider mite (Tetranychus urticae), which causes pale stippling on leaves; increase humidity, mist foliage regularly, or use biological control with Phytoseiulus persimilis.