While it may seem strange, spring-flowering bulbs need to be planted in fall in order to bloom come show time. The bulbs need a certain amount of time to get established before winter's freezing weather sets in, and they need enough time exposed to cool soil temperatures to be properly chilled. But fall doesn't occur at the same time on the calendar in San Antonio, Texas, as it does in Minneapolis, Minnesota. So how do you know whether to plant in September or November?
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