Need help planning a garden !! | Ornamental gardening | Commercial Hydroponics farming in India

Hello everyone, I'm new in this forum and I've been going through some posts just to take some idea on how I can improve the looks of my garden. I'm from Kolkata and I've grown some interest in gardening lately. I've planted Duranta and Murraya (Kamini) for hedges and a bottle palm. Planning to go for some Hibiscus and Rose variety as out garden is quite spacious and gets full / partial sun. Also got a Foxtail Palm in a big clay pot and waiting for it to grow a few feet before planting in the garden.

I'm planning to grow more and need some help from experienced gardeners here. I want to know what plants will have flowers throughout the year (at least, most of the time) and it'll be a bonus if they're fragrant. We already have Kunda, Champa, Plumeria, Tagar, Double Tagar, Ixora. I need at least 2-3 varieties so I can plant them for shrubs or hedges. Part of the garden gets morning sun and partial throughout the day and the rest gets full sun throughout the day.

Please give me some suggestions so I can make my garden lushful and exotic