Answer: It's normal for the flowers to age after a few days of beautiful display. Yellowing and browning petals are an indication that the flowers are spent. Cut these blossoms off and your plant will put its energy into producing more flowers. Mystery Gardenia flowers over a long season - from early spring through mid-summer - but eventually the shrub will stop producing flowers for the season. Enjoy those that it does produce and next year, when the shrubs are larger, they will produce even more gorgeous blossoms.
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