I just ordered 50 shrubs called "Common Caragana" ... Does anyone know anything about them.. We had a wall of Emerald Cedars and after a winter they all died.. there were 60 of them in a row.. We wanted to make a wall or hedge along one side of our garden.. We are in zone 3 and we must be careful what we plant.. They should be coming sometime this week and I have someone to plant them the next day.. I was thinking 24 inches apart would be a good spacing.. I want them to make a hedge that is thick, tall, and attractive..