Possible Clues:

• Scented garden flower
• Big bloom
• Flower named for its smell
• Lady Hillingdon is a cultivar of one
• Something thorny in start of golf before lines are broadcast?
• Eats roe (anag.)
• Flower of Chinese origin
• Revolted by non-alcoholic drink, makes a spectacular bloomer
• Bush given vocal support of course achieved prominence
• Will you find it in a bag in the nursery?