A rockery is neither more nor less than a composition of plants and rocks. They are suitable for most gardens.
The ideal is to use a slope or grade, but can also be done in a mound created for the rockery providing land.
Make sure that the pebbles are in a place with more sun.
Good drainage and is always essential. If the soil is clayey, improve it by adding sand or ditches with drainage pipes.
Use stones near you: granite or limestone. The boulder is not so natural in a rockery.
Alpine perennial plant, low shrubs and dwarf conifers. There are many carpet plants ideal for rockeries: arabide, aster, aliso, campanula or chickweed. Search blooms for different seasons and not lose interest.
Irrigation in rockery can be done by dripping or diffusers.