Inspired by the book Paradise Lot, in spring 2015, I planted three Cinnamon Yam (labeled Dioscorea polystachya) in a large west-facing planter box. They grew well, made underground tubers, survived the winter in place, and grew again this year, getting about 9 feet tall. However, they never flowered last year or this year, and I'm wondering - do they take several years to get established before flowering? Do they need more summer heat than I have? (My garden is fairly cool for zone 7/
. Maybe this is the wrong species for the aerial bulbils?
Any ideas/experience gratefully received
Powell River, BC, Canada