Im looking for dark green tall 15-20 feet narrow 2-3 maybe 4 feet conifers. Im a beginner and need something easy to care for. I think the Thuja Evergreen/Smaragd is overdone and would like something different. So far on the web Ive found two I like, Picea Glauca Pendula and Picea Cupressina. Will these work for me Do you have other suggestions Ive also thought about the Thuja DeGroots Spire if I could get it to a single spire rather than multi-branched is that the right terminologyThese would be in full sun in zone 7, my soil is alkaline clay but I plan to put in raised berms with ammended soil. Thanks for any suggestions