Hi all, Two years ago I planted 5 Arbs in a row approx 3 feet apart. All receive sun light but due to a tree the first three see am sun and the latter see pm sun. The first three are growing well and are filling in but the last two are not doing well. Behind our house any time it's windy, there seems to be a wind tunnel effect which effects the last two Arbs the most which imo is drying out one side of each arb causing that side to wither. My other concern is could there be a nutrition problem. I ended up replacing the worst arb early last year but still seem to have same problem. Any suggestions please.