If buxus has been lifted and replanted, bronzing and plant loss are usually caused by transplant shock, dry conditions, or stress while the roots are trying to re-establish.

What could be causing it

It is quite likely that a combination of factors has led to the problems you have experienced with your transplanted Buxus sempervirens.

• The most likely cause is transplant shock. While buxus can usually be transplanted successfully, the fine feeding roots can dry out or be damaged before the plants become re-established. When this happens, the foliage often changes from green to yellow and then bronze.
• Dry conditions over summer may also have contributed. While buxus do not need excessive watering, they can become stressed if they dry out for long periods, especially after being moved. This can lead to bronzing, leaf drop, and in some cases plant death.
• A lack of nutrients may also be playing a part. If the replanted hedge is struggling to establish, the foliage can lose its healthy dark green colour and become dull or bronzed.

How to help it recover

Do not be too disheartened, there are a few things you can try:

• Keep the plants evenly watered while they recover, particularly through dry periods, and avoid letting the root zone dry out completely.
• Apply Daltons Goldcote Landscape and Garden Fertiliser from mid-October through to mid-December to encourage fresh growth. 
• Add Daltons Garden Time Chicken and Sheep Pellets around the base of the plants to help promote stronger growth and deeper green foliage.

Some of the discoloured leaves may not return to their original colour, so the best sign of recovery will be healthy new growth.