We live in southwestern Ontario, Canada and unfortunately we also live very close to backyard neighbours. Our climate ranges from a low of minus 15 celcius in the winter to a high of plus 30 celcius in the summer. Our backyard gets lots of sun in the summer and very little water. We are very new to gardening/landscaping and we are looking for a plant which meets the following criteria (if any): -at least 8 feet high in year of planting (don't have to wait a year or ten in order to get the benefit) -good screening properties year round -comes up year after year or never goes away -requires little water in the summer -requires little maintenance We were thinking that there might be a tall, decorative grass that might suit but we would greatly appreciate any help on this one. Thanks.