rooting O. humifusa outdoors in full sun

[CactusBoss]

Can it be done? It also may rain.

[CactusFanDan]

From what others have said, O. humifusa = indestructible, so I'd say yes. In the wild pads would probably have to root in full sun with little to no moisture for long periods.

[CactusBoss]

I just don't want them to rot in the rain.

[daiv]

If you have them in a soil that drains as it should for a cactus bed then you can rest easy. If they are in a heavy muddy soil, then you probably still will succeed, but there is a chance of failure. Even then, you're likely to see any problems long before it is fatal.

[fanaticactus]

Just make sure your soil is fairly loose, a bit sandy (opposed to heavy clay) and that it drains after a rain. Throw a pad or 2 or 4 or ? on the ground and forget them. They root all over for me and I don't even try. It's the one thing that grows worry-free up in the northern wilds!