When is the most suitable time to move orchids indoors?

The Frost's Descent, the 18th of the 24 solar terms, is almost here in the blink of an eye, and friends who grow orchids outdoors are worried that their orchids will be damaged by the cold. They ask the farmer: when is the best time to move orchids indoors? In fact, moving orchids indoors too early has several drawbacks, and beginners at orchid growing must pay close attention. Sometimes, more warmth is not better for orchids.
1. Insufficient light affects photosynthesis and greatly reduces the ability to produce nutrients. Over time, orchid leaves will lose their sturdiness and their glossiness will decline.
2. Ventilation is worse than outdoors, and if the room temperature is too high, the orchids cannot undergo vernalization, making them prone to bud drop.
3. Without a good temperature difference, more nutrients are consumed than produced, making the plants prone to decline.
In the view of Haoshe Farmer, orchids (Chinese cymbidium and Faber's cymbidium) should not be moved indoors as long as the outdoor temperature stays above zero degrees. Only when the outdoor temperature stays below zero for a long time should you consider moving them indoors. If they have been acclimated to the outdoors all along, occasional frost will not affect the orchid seedlings and flower buds. This is my own experience.
If you are worried that the flower buds will be damaged by frost outdoors, you can gently cover them with a layer of moss. This keeps the surface of the pot moist, prevents the flower buds from being damaged by frost, and also makes the pot surface look attractive.