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Use "petunias" in a sentence
"A breeze had sprung up, swaying inward the muslin curtains, and bringing a fresh scent of mignonette and petunias from the flower-box on the balcony."
"The most striking effects were observed by plant biologists who were trying to increase the colour intensity of the petals in petunias by introducing a gene inducing the formation of red pigment in the flowers."
"Rather, let these supposedly one-shot blooms such as petunias, pansies, and violas go to seed."