Hi there, we have moved house and along 1 boundary there is a row of leylandii. The plants are rooted in our side and form a great privacy barrier however the other side has maintained the tree and its neat but sadly our previous owners have neglected their side and its 5 foot thick and blocks a lot of light from our garden.
Question is; if we cut our side of the trees back to the trunk will it kill their side of the trees? Our thought is to plant some evergreen climbers up the trunks to fill any natural gaps. Thank you.