I actually had the answer just growing a few yards away but the thought had not crossed my brain cell! Evergreen non toxic vigorous climber = Honeysuckle! I will probably send for the hardier varieties like Henry's and Winter Honeysuckle
Thank you, I understand your point. As you say in the duck pond biological filtration is unnecessary, my 14k gal koi pond is totally separate and has it's own filtration, for 6 months a year I chuck in 2lb of high protein food every day and the swirl filter from the bottom drain does a good job...
Ciao from Italy, in a nutshell I would appreciate advice on what plants/climbers I could grow up the supports to give some cover to the boxes when the ducks start nesting, was thinking of vines but not much foliage that early in the year. Advice on improvements to the area in general also...