3-4′ x 3-4′ Desmond Tutu is a bright red floribunda rose. This is part of the Sun Belt collection of roses that have been bred for hot climates. All the roses in this collection have good disease resistance.
In Hawaii insects and fungus can be relentless so the best thing to do with all your roses is cut them back 3-4 times a year. Remove all the old damaged leaves and fertilize and you will get new growth with a bounteous show of flowers. I also like to spray with horticultural oil and Neem oil to help control fungus and insects. Aphids are easily killed with this combo oil. Note I always use these oils at 1/2 strength and spray frequently.