Plants suitable for vertical gardening

Question

1. Names of plants suitable for vertical gardening in Delhi
2. Names of plants with medical uses and low maintenance cost and are perennial and require less water
3. Names of plants with a nice fragrance and with low maintenance cos t and require less water
# plants should be available in India, perennial and can bear monsoons, winter and summers

Answer 1

You have some good questions and well thought out requirements. Since we are not local to your Delhi location we would need some considerable time to search and create a plant list in the categories you inquire about. This is beyond the scope of our service in answering simple questions to the best of our ability.
But I started to search and I'm happy to report that there is a lot of information online and links to designers and services and products in India.
https://www.google.com/search?q=verticle+gardening+india&ie=&oe=

https://www.google.com/search?q=plants+used+for+vertical+garden+in+india&sa=X&ved=0ahUKEwinzoOdp_7dAhXVdCsKHS8pAgIQ1QIIfSgG&biw=1600&bih=783

https://www.google.com/search?ei=PzO_W5STKsy8rQGB05iIBA&q=vertical+landscape+gardening+in+delhi&oq=verticle+gardening+delhi&gs_l=psy-ab.1.1.0i13i30k1j0i8i13i30k1.8425.10438.0.15310.7.6.1.0.0.0.167.760.0j6.6.0....0...1c.1.64.psy-ab..0.7.766...0i13k1j0i22i10i30k1j33i21k1j33i160k1j0i22i30k1.0.5uuCf_wW3u4

https://www.greenmylife.in/top-10-ornamental-plants-vertical-garden/