Here’s how to grow a housebrick! It must be the type that has 3 holes through it.
Fill the holes with soil and plant them with Houseleeks or Sedums and dot them around the garden.
Here’s some I made earlier …( about 6 years ago) . I’ve given scores away, always with the instructions “ Ignore the plants but look after the brick” !
They really do look after themselves. In drought they shrivel, in winter they change colour, but they always survive.
The Housleeks are ‘Sempervivum’, choose a small variety. I think the Sedum is Sedum obtusatum .
When established, they’ll even flower.
Keith.