Resilience in Tomatoes

A few years back I planted both Spoon and Mexico Midget currant tomatoes in my food forest to bring some diversity/genetics and hopefully cross with some of my cherry varieties that I plant each year and save seed.  These thrive with no need to start them from seed, they reseed very easily. These varieties are supposed to have genetics going back to before the tomato was domesticated and thus are very low growing, small tomatoes.  They are tasty to snack on in the garden, but maybe the size of small blueberry.

Anyways this year birds or critters must have brought some seed up to the front of our house and deposited them in the cracks of brick that line our walkway to our door.  There's now two plants growing in what I would consider to be the worst soil possible - sand/grit/stone & maybe some moss.

This amazes me and just reinforces the fact that "plants just want to grow" and shows the resilience in these so called "wild" tomatoes.  

(If it produces before a frost I will certainly save some whole tomatoes for seed).