A friend brought in some Cymbidium orchids to repot. From far, some of them looked very leafy and green, but then I noticed that other plants had grown there.
Apparently she put her Cymbidium orchids near clumps of spider plants (Chlorophytum comosum) that grow wildly in her garden. The seeds must had been blown by the wind and ended up in the orchid pots. Cymbidium orchid roots could not compete with the fleshy roots of the spider plant. I found that some of the situations were so bad that the invader’s roots just about to smother the frail orchid roots.
Spider plant is commonly grown in hanging pots indoor, but if it is grown outside in garden bed, the plant will sooner or later multiplies and grow everywhere.
These photos show spider plants that had invaded a Cymbidium orchid and the vigorous roots had taken over and just about to kill the orchid roots. They were all dry and broken apart. Compared to Cymbidium orchid, Spider plant is very nasty and aggressive.
Hopefully the repotted orchid will grow well after all the invasive spider plants were removed.