Our new home has an established cedar edge, regrettably some cedars where dead. We want to complete the edge and we removed the dead roots out. The soil is very sandy. How should we enrich it so the new cedars have a great chance to live? gardening is new to us, thank you for your expertise.
What to do depends on why part of the hedge died. If this is a Chamaecyparis lawsoniana hedge being reduced by root rot then replanting the same kind in the same spot will be liable to result in the new plants dying as well. Seek local assistance in what the problem is with your hedge. If you know a good local garden center maybe somebody there can help.
The edge is composed of Thuja occidentalis "smaragd". According to the neighboor the old roots that where removed are in fact not from dead trees but pine trees that where taking the edge over.
Basic procedure same as other trees and shrubs: Plant in wide shallow holes dug out of and refilled with existing soil, without modification. Mulch after planting and fertilize if indicated by soil test.
