You can try to induce blooming by lowering the temperature at night, and by applying fertilizer. from 50-60F and 70-80F during the day. Many large cymbidium orchids are too dense and strong to divide with your hands. Do NOT follow this link or you will be banned from the site! Please share it if you find it useful! Many orchids will grow cold and tolerate light frost but if they are grown a bit warmer they will make stronger growths, more leads and better roots. As we’ll see later, a combination of bark and moss tends to work well. While you cut through the roots, hold your groups of pseudobulbs together so they don’t break apart. 12. Bear this in mind when choosing a potting mix. Depends how old the media is. However, it’s important to maintain good airflow around the plants to prevent bacteria and rot. Oncidiums can be divided when there are 6 or more pseudobulbs. no, that's actually a perfect explanation for the roots, thank you! Do you have any secrets or tips for growing Oncidiums? If you’d like to see all this in action, check out this great YouTube video from MissOrchidGirl: Here are some common questions about Oncidiums: Some species of Oncidium are easier to grow than others. It is important not to trim the stems of the plant once the flowers have gone, as flowers often bloom on the same stems over and over. It’s also possible your orchid has sunburn due to too much direct sunlight. well, everything i've read says oncidiums are pretty hearty plants, so i think it will live through a repotting whether it was necessary or not. (And How Can I Make It Happen? Related: How Often Do Orchids Bloom? Instead, use a saw or spade to cut the plant into sections. Think warm, humid, with plenty of indirect light through the tree cover, and you’re well on your way to knowing how to care for one. thank you very much for the incredibly informative reply! Try to leave less than an inch of the spike. You can find a variety of pots specifically for orchids, such as net pots and clear plastic pots, at your local garden store. Again, use a sharp sterile blade to do this and be careful not to remove too much healthy tissue. Alternatively, you can keep your plant in one of the more humid rooms in your house, such as a kitchen or bathroom. If it's divided up any smaller it will take longer to flower. Oncidium (say “on-SID-ee-um”) orchids are New World orchids, found in South and Central America and the West Indies, with one species in South Florida. When grown indoors, these plants can be placed in an east-, west-, or south-facing window. It is best to let the plant become large and overgrown in the pot before dividing. Related: How to Water an Orchid: Care Guide. These are Zygopetalum, Dendrobium, Dendrofalenopsis, Cumbria, Fantasy Music, Black (Black) orchid, Oncidium … Now classified as Oncidium, they should not be confused with the orchids traditionally bearing this name that need warm growing conditions. Reviving an Old Cattleya Pseudobulb by . Since we frequently get new plants while they are in bloom, I, at least, do re-pot when they are finished blooming. Sterilize your tools with boiling water and alcohol, to avoid the risk of bacterial or fungal infections. This will diffuse the light, while still letting most of it through. … wetfeet101b. The potting medium used for Oncidiums should be fairly loose and should drain easily. Plants with thin leaves will require slightly more water than those with water-retaining leaves. This makes them very popular with orchid enthusiasts. Remove older bulbs that have no foliage. For Oncidiums, it’s best to pick a pot that’s slightly on the smaller side, as they prefer a snug fit. 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