I really want to plant some creeping plants like phlox or aubrieta in our rockery, only problem being is that the place has been taken over by ferns and pesky orange flowered poppies... they are everywhere!
I have removed as many as I can get to, but some are so deep rooted under stones and in deep crackes and crevices in the walls that I just cant get to them manually.
Would spraying a weedkiller work in killing them off, or could I pour salt in the cracks and crevices. I really want to clear them off so I can start preparing the soil for the new planting.
Also, the soil in the rockery is really heavy clay, nothing much can grow in it. I have managed to dig out some part of it to its foundations which are really solid and compacted... could I ask when I replace the top soil, in order to improve the drainage should I put in a layer of stones or grit? I am just worried that it will water log as there is nowhere for the water to go! First time gardener so advice is appreciated!