The boxwood originally comes from the Mediterranean region, but has also been cultivated in Central Europe for centuries. The evergreen plant is hardy and frost hardy, only some varieties are much more sensitive.
Green-leaved boxwood is very hardy
Boxwood is hardy
Since boxwood is not sensitive to frost, you can leave it in the garden in winter with peace of mind. Only the variegated varieties such as 'Elegantissima' are more sensitive and should only be cultivated in locations with mild winters and provided with winter protection in the garden. But whether green or variegated boxwood varieties, you have to pay attention to these points:
- stop fertilizing no later than July
- cut boxwood no later than September
- both stimulate shoot growth, which is bad just before winter
- Boxwood also needs water in winter
- Water regularly in dry and frost-free phases
- Mulch boxwood to keep moisture in the soil
You should cut back the boxwood in March at the latest on a frost-free day with an overcast sky and then fertilize it with mature compost and horn shavings (€32.93) so that the plant can develop strong new shoots.
Potted boxwood needs winter protection
Although boxwood is hardy, it needs winter protection in a pot culture. This is necessary because the small amount of substrate in the planter cannot adequately protect the roots from frost. As a result, the roots freeze and the plant dies. You can overwinter the potted box in a bright and cool (maximum 10 °C) room, frost-free, but you can also leave it outside, wrapped up frost-proof:
- Place the pot on an insulating surface, such as a styrofoam plate. (€35.50)
- Put it against a house wall, do not place it in direct sunlight.
- A semi-shady place or one in the light shade is ideal.
- Wrap the planter with gardening fleece or another suitable material.
- Don't forget to water the boxwood regularly on frost-free days!
tips
During spring sprouting, pay particular attention to any frost damage that occurs due to drought in winter and often only becomes apparent months later. Cut back the frozen shoots, otherwise fungal diseases can take root.