Two schools: some fear winter pruning lets water rot hollow stems; others note many hollow-stemmed perennials handle it fine. Lantana looks ugly unpruned all winter. Cut to 12″ in January, cover stems with 3″ pine straw. Winter temperature matters more than pruning timing for survival.
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Pruning and Trellising Raspberries: Erect vs. Trailing Varieties
Propagating Lantana from Cuttings: Indoor Rooting Under Lights for Winter Survival
Winter Pruning of Large Loropetalums
Winter Hydrangea Care: Do Nothing Until Spring
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