Indoor plants are almost all tropical and adapted to grow under 3 canopies of treetops. They work in our house because the tiny bit of sun coming in the window is good enough.

Being tropical, they need a fair bit of water and the chemicals in tap water are often too much. I use rainwater, but you can set your pitcher out for 24-hours and get good results.

The stuff you see growing in cracks outdoors is almost certainly local and adapted.

I always find this to be crazy with grass. It is so damn difficult to grow a nice lawn but grass randomly grows out of rocks in the woods.

Choose plants that are native to your region. You will be surprised how well they do.

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