Master gardener and Green Thumb Guru Ed Sourdiffe, this month’s Garden Talk expert, recommends fragrant flowers. Usually, these plants are on the smaller side, but most Citrus plants flower and fruit even when small. Sourdiffe: If you find a flowering plant isn’t flowering for you then some of its needs aren’t being met. My smallest plants perhaps are the smallest of my Tillandsias or air plants. Sourdiffe: My current wishlist fragrant plant is the Heaven Lotus (Gustavia augusta).