How to adjust light and manage humidity during the growing period

　　Orchidsare plants that enjoy half shade and half sun. However, differentorchidspecies have differing requirements for light.Cymbidium sinenserequires the most shade; strong light or too long a light period will make the orchid leaves wilt, soften and droop;Cymbidium goeringii、Cymbidium kanranprefer partial shade,Cymbidium kanranprefers refracted light;Cymbidium faberi、Cymbidium ensifoliumneed more sunlight, but must not be placed in scorching sun. The intensity and duration of light have a direct effect on the number of leaf buds and flower buds that germinate, the time they emerge from the soil and their growth condition. With moderate light, orchids grow vigorously; with light that is too strong or too weak, orchids grow poorly. Orchids placed in shade sprout more leaf buds and fewer flower buds; conversely, they produce more flower buds. But spring sunlight is beneficial to the growth ofOrchidsIt has a direct effect on the number of leaf buds and flower buds that sprout, when they emerge from the soil, and how they grow. With moderate light, orchids grow vigorously and healthily; with light that is too strong or too weak, orchids grow poorly. Orchids placed in the shade sprout more leaf buds and fewer flower buds; conversely, they produce more flower buds. But spring sunlight has aCymbidium goeringii、Cymbidium kanran. In spring, sunlight should be allowed to scatter or slant onto the plants for two hours each day. The shade level of the orchid growing site should generally be kept at 60%-70% in spring and 70%-80% in summer; after White Dew no shading is needed, and the plants can receive more sunlight to promote photosynthesis and store nutrients, which benefits growth the following year. Some orchids that prefer partial shade or partial sun can also be regulated by placing them in different shady or sunny spots at the growing site. "Drought tolerance" is one of theorchid'shabits. Orchids' requirements for dryness and moisture should be divided into two aspects: first, air humidity, and second, potting soil humidity. Orchid leaves grow in clusters and have a relatively large area for transpiration, so they need higher air humidity. Theorchid'sroots, leaves and pseudobulbs have a unique structure and can store water, which is why orchids can tolerate drought. The dryness and moisture of orchid potting soil is best kept at "moderate dryness and moisture, on the dry side of moist." Being on the dry side of moist is good for aeration and sprouting. Potting soil that is too wet leads to root rot and invites disease. Specifically, in spring, summer and autumn, orchid potting soil is best kept at seven parts dry and three parts moist, and in winter at eight parts dry and two parts moist. During the leaf bud growth period (roughly from May to the end of June), orchids need more water; if there are consecutive sunny days, they should be watered appropriately to produce strong seedlings. During the leaf bud emergence period (roughly from March to April), watering should be appropriately reduced, otherwise the base of the young buds easily turns black and rots. During the winter dormancy period, water even less or not at all. When the potting soil is too wet, a small amount of plant ash can be scattered on the surface of the pot to regulate the soil moisture.