I got some non-stop begonia tubers and they sat around in their bag for a few weeks until I got around to potting them up. Most of them had sprouted already, but not a sprout like any other plant I've seen. I have no experience with growing these type of begonias, so I have no idea what's normal, or what's needed.

When I put them in pots, I covered them with about 1/2" potting soil, so some of the sprouts were sticking out of the soil. Because of that, I put those under lights. It's been about a week, and I've seen little to no growth.

The other pots that didn't have sprouts sticking out of the soil, I put on a heating pad. Will that help or inhibit growth? They're showing no signs of life. How long does it usually take for begonia tubers to get going? Did they sit around for too long to still grow?

Thanks,

Deanna