What do I do with early spring planted cool-season annuals when summer arrives?
What do I do with early spring planted cool-season annuals when summer arrives?
Cool-season annuals are annual plants that prefer cool temperatures, growing best in spring or fall. Many are tolerant of a light frost often surviving down to 28°F or sometimes even 25°F with little damage to flowers or leaves.
Since nearly all cool-season annuals do not grow well in warm temperatures, especially those that exceed 80 to 85°F, they can be replaced with summer annuals once the danger of frost passes in early to mid-May for much of Iowa.
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