Willow will work, but creates constant work almost like the bamboo - but without the rhizomes... I put some willow sticks in the ground just at the entrance to the veggiegarden two years ago and am working on an arc-shape... maybe you can see it on this pic... if you fence with willow, you'll have to work it into position/form and cut out all not needed branches all the time... we built an iglo from willow in kindergarden and last year nobody found the time to keep it in shape... so just now, today, hubby went there to chop the top off (it's a mess) with the motorsaw and I will try to "braide" the top back into a decent shape throughout the next year... will be a monthly task....
