Fertilising a Thuja occidentalis 'Martin'
To support the robust growth rate and visual density of Thuja 'Martin', it is essential to provide the appropriate nutrients. Fertilize twice annually—in early spring and mid-autumn—with a balanced, slow-release conifer fertilizer to encourage strong root development and dense foliage. In spring, fertilization helps kick-start the year's growth, while the autumn application prepares the hedge for the colder months, enhancing winter hardiness in climates as low as USDA zone 6, where temperatures can drop between -17.8°C and -23.3°C. When applying fertilizer, ensure even distribution around the base of the hedge, avoiding direct contact with the trunk and foliage to prevent burn. An adequate fertilization regime will ensure that the hedge remains healthy, luscious, and provides effective privacy year-round.