Cosmos in debris clump

Cosmos grow amongst two year old debris clump occupying the western edge of main roof.  These clumps are going through drought periods.  I haven’t been diligent watering since the tomatoes died.  The wildflowers are still popping up however and blooming.  I cheated and seeded these.  The grass and most all other plants in these clumps comes from whatever seeds make it and survive.