I think the rock from the water feature, highlighted with the pinks, lavenders, soft blues, whites, and greens would be the ultimate here. I think the colors are very wrong in the picture.... They should highlight the structure not draw your attention away. That house is made from rock for a reason, it should be the focal point of the landscape. I think that the gardens should draw attention upward toward the house... not away from it. I haven't been to landscaping school but that makes sense to me.