By late September, spiky seed pods form. Collect them on a dry day. Share with neighbors or local ruilgroepen (plant swap groups). Among mature Dutch gardeners, sharing Moon Flower seeds has become a quiet tradition — a symbol of patience passed from one evening lover to another.
: At maturity, the vine can grow 10–15 feet tall and 3–6 feet wide, thriving in USDA hardiness zones 10–12 as a perennial and as an annual in cooler climates. moon flower mature nl