Hardy petunias are not hardy enough to be grown in cold temperate areas. They require a long growing season and warm temperatures to flourish.Here is how you can determine if your area is suitable for Hardy petunia growth:
Hardy petunias are plants that can withstand a wide range of temperatures. The temperature at which they die is typically around 20 degrees Fahrenheit, but the temperature at which they thrive is above 80 degrees Fahrenheit.
How do you protect petunias from a cold?
A: You can put them in a pot with a layer of sand or soil on the bottom to help insulate the flowers. You can also place the pot near a heating vent, so that it will be warmer than the surrounding area.
Hardy petunias are plants that can withstand heat. They need to be around 65 degrees Fahrenheit and above. If the temperature is too low, they will die. Reference: what temperature is too hot for petunias.
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