Possible Clues:

• Spiked OJ
• Grand, so I am, and so flowery
• Champagne-and-OJ drink
• Tropical tree or shrub with clusters of fragrant flowers
• Acacia kin
• A flowering plant so many in the end sent back
• Two seconds, and I'm in a sensitive plant
• I'm around with blooming Sam around
• Plant of the sensitive plant genus
• Bloomer for Buck's Fizz on Broadway?...