while you're waiting for your bamboo to grow you could have sweet peas wigwams with trailing edibles (toms or peas perhaps) surrounding? Rosa City of York does well on a North facing shady wall (at a friends) and at mine on an east facing fence with 2 hours sun a summer day. Nicely scented and prolific flowers. note to say I would have designed it for £zero as long as it got built and I could have used the pics for promotion (new designer syndrome!) that said you've done a great job from what I can see, nice simple background to the soon to be gorgeous planting.