.Hydrangea ‘Onyx Peacock’ doesn’t just bloom—it makes a statement. With jet-black stems and massive mophead flowers in vivid shades of blue, purple, or pink (depending on soil pH), this is a next-level hydrangea for serious garden impact. Blooming from early summer through fall, it keeps the color show rolling, standing out in borders, foundation plantings, and containers. Pollinators love it, deer ignore it, and gardeners can’t get enough. Cold-hardy, reblooming, and easy-care—this hydrangea has it all.