I have an Emerald Cedar that is 2-3ft wide and 5-6ft tall (probably planted 4yrs ago)and it cannot stay where it is. Will I kill it if I try to transplant it? How big around and deep do I need to dig to try if it can be saved? Thanks.
Little point, as even the hardiest cedar (Turkish Cedar) is unlikely to survive long-term in an area with winters as cold as Ontario gets.
Unlikely to be cedars, then. Probably an arborvitae or a cypress or a juniper, which are sometimes erroneously called 'cedars' even though they aren't. Do you have a photo that could help identify it?
One of the most prevalent of woody ornamentals in temperate North America, Thuja occidentalis 'Smaragd' (Danish for "emerald green" or similar) is commonly dug and sold in various sizes. If you are experienced in transplanting woody plants of the size your tree is you should have little trouble with this - at the right time of the year for your area.