Toughie on Tufa.

Plan A was a lump of Tufa which ceased to adorn an alpine trough 10-12 yrs ago. It got out of hand during the shop years, was emptied and is yet to be refilled. The Tufa has lain around since then, and so far as I can remember hasn't even been watered, and you can tell. But this wee Saxifrage is hanging on like grim death.

Plan B on perusal of the shots, turned out to be one of the first Macros I've done for some months now. The DoF brown is the dead section, the DoF green is the live end.