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when to pronounce begonia tubers dead

Posted by crazyforcorelli z5 utah (My Page) on
Sun, Mar 20, 05 at 15:55

I'm having trouble waking up five begonia tubers, and I'm wondering if I should just give up and pronounce them dead.

I overwintered three of the tubers, and these are all quite small -- about the size of a quarter; the other two are large tubers (4 inches or so) that were purchased only a few months ago (from Two of the small tubers are the "On-top" variety, but I don't know what the third is; the large tubers are a Skagum and a Daffodil-type.

I've had all of these in my 66-degree laundry room for 3 weeks, and they haven't broken dormancy. I even gave them a hot-water bath about a week ago(following the directions given on the Canadian Begonia Society's webpage). They're being stored in individual bags in a cardboard box. All of the tubers are firm; there are no mushy spots.

Am I doing anything wrong? Do the tubers need light to break dormancy? Is there any way to determine if they're dead? Or should I just stop being an impatient newbie?

Follow-Up Postings:

RE: when to pronounce begonia tubers dead

Try to place them on top of a pot of damp, warm peatmoss sphagnum (e.g. with bottom heat, etc). Place the tubers up-side-down (the hollow side down, rounded side up). Leave them at 75F for 2-3 weeks, and they should sprout. check every few days. once they sprout, turn them right side up (hollow side up) and plant them as normal.

RE: when to pronounce begonia tubers dead

I'll get right on it! Thanks!

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