Healthy leaves are light green or yellow-green. If they are bright yellow or spotted, the plant receives too much sun. If the leaves are dark green, it receives too little sun. [3] X Research source
Some cymbidium orchids are hardier than others. While some sources claim a USDA hardiness zone range as wide as 5–10, most cymbidium orchids will be much easier to grow in zones 9 and 10, where winter temperatures are mild enough to keep the plant outdoors at night.
Rainwater or reverse osmosis water are great options, especially if your tap water is hard. However, do not use water “softened” by other processes, as it may contain salts that can damage the plant. [7] X Research source Water early in the day if possible, so the water on the leaves evaporates before nightfall. Water left on the plant during cool night temperatures may increase the chance of infection. [8] X Research source
Do not reuse stakes from other plants, as this may transfer infections.
Once cooler autumn weather begins, continue on to the section on dormant season care.
If you plan to divide the orchid plant, as described below, you will need two or more smaller pots, one for each piece. Terra cotta pots are preferable to plastic pots, because their more porous material reduces the risk of water pooling around the orchid’s roots. [18] X Research source
Many gardeners have their own preferred mixes, and you may wish to ask a local expert for advice. In a humid area, additives may not be necessary to retain moisture.
In order to reduce the risk of infection, sterilize your knife or shears before dividing the orchid, wear disposable gloves, and work on a layer of clean newspaper. Change gloves and newspaper, and clean the knife again, before handling another plant. [23] X Research source You may plant smaller pieces as well, but these may take two or three years to bloom for the first time.
If you are planting a divided piece of an orchid plant, carefully spread out the roots so they are evenly spread throughout the pot, but avoid breaking them.
