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I just bought a spider plant from a store recently. The plant is so aggregated that I can see many stems in a 8cm diameter pot ( 10+ ). I wondered if I can separate them. I tried to separate them from the soil, then I see their roots are so fat like a mini-radish, this is a pic from the internet:

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What is this special root called?

This is one of my plant bought from a store:

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You can see there are so many plants inside a single pot. Can I separate them without hurting them?

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1 Answer 1

The roots in the picture seem to be simply fleshy, thick, tuberous roots. The special horizontal root a spider plant also has is called a rhizome.

You can separate them without hurting them. Ideally such division would be done after growth stops (during dormancy) or after flowering. You want to just water well, then lift and pry the root ball apart into separate plants and trim any damaged/dead roots from the divisions, and repot.

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Normally I think spider plants separate themselves on their own (so no ripping required) but I suppose using a clean sharp knife and a proper dressing of fungicide would also work to cut two plants apart. –  Vervious Jun 13 '11 at 5:58
    
Maybe they are tubers, but everything I've read calls them rhizomes. Perhaps there are both fleshy roots and rhizomes, which may be where I'm going wrong. –  Vervious Jun 15 '11 at 17:08

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