Wednesday, April 8, 2009

Oncidium onustum

Oncidium onustum 'Bountiful' - Photo by Richard LindbergThe genus Oncidium (Onc) contains 600 species from throughout Central America and South America. They grow in a wide variety of environments. If you know a little about where the species grows, the do very well in cultivation.

Oncidium onustum grows from Mexico to Ecuador and Peru. It is warm to hot growing and needs a complete dry winter rest from after blooming until new growth starts.

This plant was in bark and in far too big a pot. All the roots below the top of the medium are dead. The small pseudobulb has bloomed and so must be considered mature. It should be larger than it is.

The ideal is that each generation is as large or larger than the previous generation. Since it is not true for this plant it is close to becoming a recovery plant. But not quite.

One feature of Oncidiums in general is that they grow upward. It is particularly true for this species where the upward rhizome is almost as long as the pseudobulb next to it. They do better mounted, and that is what I am doing with this plant. I chose a fairly small piece to make the immediate proportions better, but I may regret that decision in a couple of years.

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I have plants for sale on eBay.

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