What does it mean that flowers should not be brought in for winter or out for spring?

If you grow flowers indoors, early winter and early spring are the times when flowers are most likely to die, but beginners often do not understand why. In fact, for most flowers and plants, the low temperatures and frost damage of winter are very harmful, so in the flower-growing world there is a saying: "winter in, spring out."

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Many experienced flower growers know the rule "winter in, spring out." "Winter in" means that when the weather first turns cold but there is still no frost, for most flowers you should not rush to move them indoors. "Spring out" means that when the weather turns warm, you should not rush to move them outside; you should wait until after the last late frost of spring before starting to move them outdoors. As for blindly moving them indoors and outdoors, if flowers are to avoid dying, measures for cold protection and warmth must be taken, as follows:

First, move the flowers and trees directly indoors, or cover the flower pots with plastic film, or directly slip plastic bags over the flowers and trees, or set up a temporary simple mini-greenhouse to keep them warm.

Second, for flowers and trees with strict light requirements, place them on an indoor windowsill or in a sunny spot near a windowsill.

Third, for those with less strict light requirements or that can tolerate shade, they can be placed in a cool, shaded spot without light, but in all cases pay attention to ventilation and air flow.