Answer: This is such an interesting question. Depending on the conditions, you might be able to grow moss there, or you might be able to spread some gravel topped with compost, and grow alpine scree type plants such as Aquilegia. Or, you could consider a Japanese garden effect created with raked gravel and a few large impressive stones and possibly a water feature such as a fountain. Or, perhaps you could consider the rock to be the equivalent of a paved patio, adding seating, a fire pit, and large containers of plants accordingly. I hope this gives you some ideas.
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