Q.Potted ivy plants
My potted ivy plants were left outside all winter. The leaves did not fall off but, of course, the plant looks dried up but not dead. Will the plant come back if I cut all stems down to the soil surface? And should I change the soil in the planter?

You can cut back an ivy within a few inches of the soil surface with the expectation of it growing back, provided the root system is still healthy. With fresh soil, water, nutrients and warmth in the right quantities, your plant may grow back. You can read more about how to save cold damaged plants at the following link:
https://www.gardeningknowhow.com/plant-problems/environmental/tips-for-saving-cold-damaged-plants.htm