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Probelms with small plants, C. gigantea

Posted by oxmyx 6 ( on
Mon, Dec 10, 07 at 8:29

Hi, new to this forum, Usually I can be seen over at Brugmansias forum...
I purchased 2 Thailand Colocasia Gigantea from an online vendor. The plants were small and had two leaves each. They are not doing so well.. leaves have yellowed and shriveled and one plant has rottend at the tuber. Dug both up, there were in peat pellets, place in a 2 inch container. After I took away all the dead material, one of the tubers has a growing tip, and the tuber is firm but no roots. I would like to save it since I spent 8.00 a piece, and need a head start, here in Connecticut in order to get decent sized plants next year.

I have them in the kitchen under Fluoresecnt lights, with a humidfier. I keep them moist. It is a bit cool at night.
Does anyone know what might be the problem, and how best to treat the one salvagagable tuber?
What is the consensus of oppinion on indoor cultivation, here on this forum?
Also I have a Alocasia Macrorrhiza, which also does not look good, although I see new white roots.

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RE: Probelms with small plants, C. gigantea

Alocasia are easy to overwinter as dormant "tubers", but they are difficult to keep growing indoors where conditions are poor. If you have a cool, dark place (cellar, garage) then the tubers can be stored like potatoes until planting time in the spring.

Colocasia gigantea are trickier because they do not form a tuber like other species. What I do is bury them in large pots outdoors, and then in the fall I cut back all but the newest leaf, dig out the pot, and store the entire rootball in the garage.

With Alocasia you can do the same, but it is easier to let a light frost kill the foliage, then you can cut back the leaves and dig out the plant and let it dry for a few days. Then trim off dead roots and foliage, and store the tuber in a box of barely moistened mulch, perlite, or vermiculite.

Both of these need lots of room and very bright light to be successful indoors. It is tough to get good light indoors without artificial supplementation, but at that point it is not worth the expense in my opinion. These plants grow so fast that there's no need to preserve them indoors.

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