Rod wrote:
C.armandii would certainly do the job for you if your tank and trellis
are big enough. It's a lovely thing in flower and scented but it can
look a bit rough after a bad winter.
If rhodies do well for you and you like them - is your budget big
enough to buy well grown specimen sized plants? but of the fairly
compact slowish growing varieties like the R. yakusimanum hybrids,
loads to choose from, all lovely. Mix with the odd nice azalea at the
front something like 'Irene Koster', again like the rhodies these
transplant quite well as big plants and are available in 'specimen'
sizes, would break up the dense evergreen and don't get too huge.
I still think you'll get a more pleasing effect by breaking up the
outline of the tank rather than attempting total concealment. While
I'm talking of camouflage - if you want to make garden woodwork
inconspicuous don't paint it green, use one of the lighter brown wood
preservatives (just look around at the proportion of brown to green in
a garden - I'm prepared to bet you'll see more browns than greens)

Hi, Rod. Well, I'm determined to cover that trellis so densely that it
won't matter what colour it's been painted! :-)

I agree that your idea of a number of different plants will be more
interesting and more disguising.

The rhodies will eventually grow, but in the meantime that trellis has
got to be covered.

Have just been using some of these "plant selector" engines. They're
throwing up ivies, and I'm wondering if buying a few well-rooted ivies
would be worth it. I've seen ivies doing a wonderful job on walls, but
will they take to a trellis? I'm wondering about:

http://www.bbc.co.uk/gardening/plant...ges/1343.shtml

http://apps.rhs.org.uk/plantselector/plant?plantid=917

http://apps.rhs.org.uk/plantselector/plant?plantid=915

But the "plant selectors" have also thrown up:

http://www.bbc.co.uk/gardening/plant...ges/9807.shtml

http://www.shootgardening.co.uk/plan...t%2Fresults%3F