A combination of Custom built box seating and box planters made from timber cedar battens. They can be filled with potted plants or even attach wire cables from the box frame to the verandah beam, and plant star jasmine, they will naturally espalier (climb) the wires. Running them in a cross looks amazing, and then perhaps a simple informal hedge will screen the roofline, and still allow fornthe sky horizon to be seen from your deck.

thank you so helpful.

Plants in pots need care. If they don't look fantastic, then they have a totally negative effect.
The more you try to hide something, the more you will draw attention to the space, so I would steer chear of the espaliered star jasmine.
But big pots would look fantastic. I know you stated minimalistic, but I would still aim for a warm colour. Total neutral tones are cold and good design should have a balance of both. Kellock Trading have some wonderful pots worth perusing on their website. Bold red pots that are good quality would work, but they need to be good quality to be classic and hence lasting. Its pointless getting fad-driven pots that will become obsolete in a couple of years.
As plants for the pots, the same plant throughout should be used, but if it is a tall, upright pot then don't put a tall plant in it - its entirely the wrong shape. A native grass (akin to a grass tree) called Lomandra 'Nyalla' would look fantastic. It's non seeding, very tough and would be the perfect shape and contrast to a big bold red pot. But then the choice is yours to make.
Good luck with your endeavours.
Alison

Thank you so much for your brilliant suggestions, what do you think of alternating (higher and lower) height of the plant screen?

Considering your desire for a minimalist look, then keep the line the same.
The bold red will draw the eye. You will barely notice the roof next door, and this roof is such a muted tone. Its not as if its an ugly green or blue.
For the screen to be truly effective, your plants need to be HEALTHY. If not, the whole effect will be lost. Quality, premium potting mix is essential and so is a healthy regime of watering and occasional fertiliser.

@rainaobruzzi,
I agree with Midesign0401 and Timandra Design & Landscaping with some of the suggestions.
I would definitely go the seating and planter boxes, as it would give you a sort of safety fence and security from what appears to be some height factor and this would frame the existing timber flooring too and the jasmine would look and smell sensational over the open slat roof frame creating a sort of "green" roof and fence above the seating, so to speak.
I expect the seating would be about 500mm off the floor and it would continue with a high slatted back up to say 1.2m with the planter boxes being higher than the seating.
If all you have to look at beyond your balcony is this roof, then minimizing the view beyond the seating is imperative.
If you have the jasmine covering the area over time, above the 1.2m backing, then your eye will be drawn up and to the trees in the distance that are just visible over this roof.
I like the suggestion of the Lomandra for the planter boxes but I don't agree that neutrals are a cold colour.
A cold or cool colour for me is blue and warm colours are neutral, earthy like beige, brick red etc...so the red pots could look ok but not a bright red.
Good luck.
Cheers,
Barbara

Seating with style grace face you home then adding plants boxes wall hanging chandlers mirror while havin designed in and around the windows talbes

I like the idea of built in seating with some beautiful Kyoto screens. http://kyotodesign.com.au

you still have some view above the roof line of next door... how about some frosted or semi opaque screening( you dont want to lose any light) but above it have random height hanging baskets or perhaps some interesting hanging sculpture in keeping with the simplistist theme.. perhaps some interest on the columns with vertical gardens from top to bottom ... and some slimline boxed seating running all the way along( good for storage underneath) a fire pit ... lots of scatter cushions and friends to help you enjoy it! best of luck and enjoy all the choices you have in store.

simplistic lol sorry

Amazing great suggestion can't wait to get started what shape baskets.

Whatever you decide on, you need to consider where north is and the effect that it will have on available light throughout the year. It already looks darkish.
You may also need to consider the safety aspect - young children and a sheer drop?

The outside deck area is West....and there has to be a screen safety wall 150 high. The area has no dark problem. There will not be a drop as there has to be a safety wall (screen?)

if you are facing west, you will need to consider the harsh summer sun that is going to be streaming in there (assuming you are in Australia). causing discomfort to humans and plants alike. our pergola opens to the west, and after years of trying to screen with plants, etc, we have had to fix shadecloth panels-and it works brilliantly.

Thank you, I didn't think of the sun.....As the house is air conditioned and shade cloth is on the windows;....the decking is really only to be used when it is cooler...there is another decking on the other side of the house....I am really just wanting a fantastic looking screen wall idea because the window is so long...and high that the outside is "in your face"...Protection from sun will not be a priority...Thank you

I would think about a wall garden/ grow wall to create a private outdoor room?

As a minimalist I would forego all plants, put in a low wall and use slumped glass or preferably glass block. This would let in the light and also make a cosy seating area in winter. I've found glass block to be a wonderful insulator on a west facing wall - warm in winter, but keeps out summer heat too.
This would also extend your living area, keep out flies and mozzies, and prevent you seeing that awful roof next door. You could also take the shadecloth off the windows leading on to that deck, which would be a bonus. I'm not a fan of shadecloth, and would always look for an alternative solution

oooohhh my gosh....Perfect! Glass blocks...would look amazing....I can't believe the answer is so simple......Thank you so much

Love that idea melbourne1944. I can picture it already...

Love that idea also.....amazing how simple the answer can be, thank you Melbourne 1944.