Sprouting in the window

Literally.

As I washed the breakfast dishes, this morning, I  was delighted and horrified, to discover, I have "something" growing out of the  kitchen window. 

The delighted part of me..................
is in awe, that a tiny little seed (more than likely of a weed), could blow up, onto the interface, between the window and the cracked peeling putty, AND GROW !

The horrified..............
OMG !  My house is falling apart. And the damp problem, is fostering a forest.