When Oncidiums are potted in a basket there should be a great deal of crock and not much compost. Sphagnum may be added to the orchid soil or medium. The genus requires a lot of water and consequently adequate drainage

When Oncidiums are potted in a basket there should be a great deal of crock and not much compost. Sphagnum may be added to the orchid soil or medium. The genus requires a lot of water and consequently adequate drainage

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