To maintain the shape of your box hedge you should prune it twice a year. The first trim should be carried out in late May or early June after the risk of frost has passed.
The second prune should be done in early September if you cut your box back any later than this you will run the risk of the new growth that your box will produce being killed by the cold weather in winter.
It is also best the trim your Buxus when it is cloudy as this reduces the chance of burning the leaves on your plant.
When you trim your box you damage part of the leaves, this will make them turn brown and fall off after a couple of weeks when your box starts to shoot up again.
If you need to take drastic action and rejuvenate an old hedge this is best carried out in early autumn before winter sets in.
How To Trim Your Box Hedge
Trim the new growth in late spring using a pair of garden hand shears, cutting back to a couple of leaves above where the current growth starts. Avoid cutting into last year’s older growth, which will be a darker green. For the top, make sure that you keep the blades horizontal to get a nice level surface.
Use scissors or secateurs to cut your Buxus into an intricate shape. Cut back the current season’s shoots when they have reached 3 to 4 inches (8-10cm) in length.
When To Feed Your Buxus
Established Buxus planted in the ground should be given a general-purpose fertiliser in the spring, it is also a good time to give your box a couple of inches of mulch to help with moisture retention in the warmer months ahead.
Box that is grown in containers should be topdressed in spring with fresh compost and given a slow-release fertiliser, and feed monthly during the summer months with a general-purpose fertiliser.
Feeding your box once or twice a year with Vitax Buxus Fertiliser will also help provide all the nutrients needed to maintain a rich dark green colour and promote strong healthy growth that is more resistant to disease.
When To Water Buxus
Box and evergreen plants, in general, need regular watering even in winter because of water evaporation from their foliage.
How much water your box needs depends on where it is planted, which type of soil it is in and the time of the year.
During the winter check your box once a week keeping the soil moist but not waterlogged.
In the spring and autumn check twice a week except in the periods of heavy rainfall.
Check daily in the summer months and water when required.
Buxus planted in a pot will need more water because container-grown plants dry out more quickly. Putting a tray underneath the pot can be useful as you’ll have some water reserve, and remove the tray during the winter making sure the potting has good drainage.
- Excessive sunlight can cause sun-scald and discolouration to the leaves.
- Yellowing of foliage may be a symptom of waterlogging, especially on heavy clay soils.
- New growth in spring can get caught by frost, turning the leaves pale brown and often papery-looking.