Fertilising a Buxus sempervirens
To ensure a healthy and lush box hedge, appropriate nutrition is essential. Fertilize Buxus sempervirens in early spring, just before the onset of the growth period. Opt for a balanced, slow-release fertilizer that will provide a steady supply of nutrients throughout the growing season. This is crucial to support the species' modest annual growth rate of 10-20 cm.
An additional application of fertilizer can be beneficial in mid-summer to maintain the visual density and vibrant green foliage characteristic of this evergreen hedge. It's important not to fertilize too late in the season, as new growth needs time to harden off before the onset of winter, especially to withstand temperatures down to -17.8°C, as per its USDA zone 6 winter hardiness.