I've designed a pyramid strawberry planter that I build and market here in Southern Maryland. The towers offer a unique way to grow strawberries, herbs, and flowers. If you can do some woodworking, the plans are available to build a 3 ft. and 6 ft. model on my website. If anything, it may give you some ideas:
http://www.chesapeakecrafts.com/STRAWBERRY_TOWER.php

Hi, i just know bout strawberry is that it is best to be planted in a moist soil with cool weather. Nice to see the pyramid design post here. It was a good idea, saves space.