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I have bought flowers that are tagged as annuals due to the grow zone I'm in. However, I heavily mulch(about 2-3 inches of mulch/leaves) the plants and most of them have come back. They do take a bit longer to wake up in the spring. I am in zone 4b and have plants/flowers that normally grow in zone 6. Never say never! Hope that answers the question.
Wiki User
∙ 14y ago
Wiki User
∙ 8y agoPetunia are tender perennials in zones 9-11. In lower zones, petunias are annuals. They don't like weather much below 60 degrees Fahrenheit.
Wiki User
∙ 8y agoPetunias are tender perennials in zones 9-11. In temperate climates, petunias are wonderful annuals. They don't like temperatures much below 60 degrees Fahrenheit.
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