Central heating systems make home humidity lower than greenhouse conditions. Light is usually drastically lower in quality and quantity. Houseplants should be gradually weaned from the near-perfect conditions of the greenhouse before being placed in the home. This is called acclimatization. Scientific study has shown that plants produce both sun leaves and shade leaves.
Plants grown in the sun have thicker, smaller, more numerous leaves.
These leaves have less chlorophyll. Shade leaves are thinner, larger and fewer. They contain more chlorophyll. When light conditions are dramatically changed, leaves must be replaced. A gradual change through acclimatization is less stressful to the plant.