Do you have a photo of the terrace garden now? There are so many creative vertical gardens right now - I'd love to help come up with the perfect design for your space. I'm sure you've browsed Houzz, but here is a specific search for vertical gardens - the possibilities are endless! https://www.houzz.com/photos/vertical-garden-design-ideas-phbr1-bp~t_724~a_34-281

I have been thinking of growing a live wall for quite sometime now! I want a vertical garden with a purpose, growing all the herbs I love and then eating fresh! It can be a challenge, but I'm sure it will be worth the effort :)

My verandah having ample space with roof above giving clear view of my small garden and main gate. Mesmerizing me to either read or play with my German Shephard dog who is always keen to play with keen attention on the main gate intriguing to pounce upon depicting his alertness to his duties.

You should better go for a natural garden instead of an artificial one!! You really have a very good space to work on ! U can have a mdf wall panel (jaali work) like around 4'x8' installed on the main wall, lit artificially from the rear side. Then a row of planters sown at a ht of 2'.. then a l-shaped seater across it! If you need help in planning(charges applicable) leave a mail at archkrutistudio@gmail.com Something like the attached photo!