I love my Nikko Blue hydrangeas. When the flowers mature, they are a brilliant sky blue. I love that they do equally well on the shady side of my house as they do on the sunny side.
Half a dozen years ago the sewer line broke and a trench was dug from the foundation to the curb. When the trench was backfilled, the soil in that area was a different pH, resulting in gorgeous pink blooms.
This year, there was a third color. Lavender.
The question is, was the lavender the result of pink mingling with blue or blue blending with pink?