Overwintering guide
How to overwinter japanese holly 'sky pencil'
Winter watering
No winter watering needed in open ground. Containers only need water in long dry, frost-free spells.
The mistake that kills japanese holly 'sky pencil' in winter
Cutting japanese holly 'sky pencil' hard back in autumn "to tidy up". That removes the growth that shelters the crown, and on some plants removes next season's flower buds entirely.
More japanese holly 'sky pencil' care
Overwintering japanese holly 'sky pencil' — FAQ
Does japanese holly 'sky pencil' need to come indoors for winter?
Japanese Holly 'Sky Pencil' is hardy to roughly USDA zone 6 — winter lows around -23°C. That means it can stay outside all winter in most temperate gardens. Japanese Holly 'Sky Pencil' is properly hardy and overwinters outside without fuss. Tidy away anything dead or diseased, apply a mulch over the crown to steady soil temperatures, and otherwise leave it alone — many hardy plants actually need a cold period to flower and grow well the following year. Save hard pruning for the right season rather than doing it in autumn.
When should I move japanese holly 'sky pencil' for winter?
Tidy and mulch in late autumn; leave the plant undisturbed until spring.
How often should I water japanese holly 'sky pencil' in winter?
No winter watering needed in open ground. Containers only need water in long dry, frost-free spells.
What kills japanese holly 'sky pencil' over winter?
Cutting japanese holly 'sky pencil' hard back in autumn "to tidy up". That removes the growth that shelters the crown, and on some plants removes next season's flower buds entirely.