Some petunias are annual plants, others are perennial. You probably have an annual variety, which means they should be petering out right about now. Dig them up, perhaps replace them with something cold hardy like mums, and plan to plant fresh petunias next year. If you want them to come back the following year, be sure they are perennials.
Some petunias are annual plants, others are perennial. You probably have an annual variety, which means they should be petering out right about now. Dig them up, perhaps replace them with something cold hardy like mums, and plan to plant fresh petunias next year. If you want them to come back the following year, be sure they are perennials.