We discovered the parent of this giant seed strain on the lower slopes of Montara Mountain in San Mateo Co.. With broad, white flower clusters reaching up to 4 ft. high, this is the largest yarrow we've encountered. While seedlings can vary, we have high hopes for this new introduction. Give full sun and moderate to infrequent irrigation. Potentially an excellent spreading perennial for a tall meadow. Attracts all sorts of pollinators. The green, fuzzy leaves are usually considered to be deer resistant.