Jacaranda and delonix regia are good options. Better than tabebuias. Tabebuias have only 10-15 days flowering period. The flowering times vary amongst different trees of the same species and therefore unpredictable. I have 5 of these. T. Heptaphlla- the supposedly better species but it's not really what it is in the best of pictures on Internet. Jacaranda and delonix regia have beautiful foliage and long 30 days blooming periods. Delonix is rated as one of the best flowering trees in the world. Both are medium height trees. And not expensive
I am actually creating a roof garden on a relative's office. It's a hobby, not a commercial project and I am looking for ideas.
I have a space with a round, 18 inch radius pot in center and I want to plant a tree that can rise ~10 ft, has a canopy (like delonix) and has beautiful flowers like prairefire, delonix, jacaranda with a reasonable blooming period per year.
From the internet, crabapple prairefire looks amazing but I don't know what's the local name and whether it will work out.
It would be great if you guys can share some suggestions on what i should/shouldn't do based on your experience.
18 inch is a small pot for a tree... I would recommend Chhoti gul mohr... Caesalpinia pulcherrima... it is an evergreen shrub which blooms year round in Karachi.. the trees you selected will not bloom in Karachi...