Troubleshooting
Weigela 'Nana Variegata' problems — and how to fix them
Weigela 'Nana Variegata' (Weigela florida 'Nana Variegata') 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.
Reversion to plain green foliage
Strong plain-green shoots sometimes emerge on variegated cultivars. Remove these at the base immediately — they grow more vigorously and will outcompete the variegated form.
Failure to flower profusely
Usually caused by pruning at the wrong time. Weigela blooms on the previous year's wood. Prune immediately after flowering, not in autumn or spring, to avoid removing next season's buds.
Powdery mildew
White powdery patches on leaves in dry summers with cool nights. Improve spacing and apply potassium bicarbonate spray; resistant varieties are available.
Aphid infestations
Dense colonies on soft new growth in spring. Blast off with a water jet or apply insecticidal soap; ladybirds are effective natural predators.
Die-back after hard winters
Occasional stem die-back occurs after severe frosts. Cut dead wood back to healthy growth in spring; plants typically regenerate vigorously.
Prevent weigela 'nana variegata' problems before they start
Most weigela 'nana variegata' issues are care-mismatch, not bad luck. Dial in the basics:
Weigela 'Nana Variegata' problems — FAQ
Why is my weigela 'nana variegata' reversion to plain green foliage?
Strong plain-green shoots sometimes emerge on variegated cultivars. Remove these at the base immediately — they grow more vigorously and will outcompete the variegated form.
Why is my weigela 'nana variegata' failure to flower profusely?
Usually caused by pruning at the wrong time. Weigela blooms on the previous year's wood. Prune immediately after flowering, not in autumn or spring, to avoid removing next season's buds.
Why is my weigela 'nana variegata' powdery mildew?
White powdery patches on leaves in dry summers with cool nights. Improve spacing and apply potassium bicarbonate spray; resistant varieties are available.
Why is my weigela 'nana variegata' aphid infestations?
Dense colonies on soft new growth in spring. Blast off with a water jet or apply insecticidal soap; ladybirds are effective natural predators.
Why is my weigela 'nana variegata' die-back after hard winters?
Occasional stem die-back occurs after severe frosts. Cut dead wood back to healthy growth in spring; plants typically regenerate vigorously.