100 MILK THISTLE Silybum Marianum Flower Seeds BLOOM TIME: Mid Summer - Early Fall HARDINESS ZONE: 5 - 9 (and reseeds itself easily) PLANT HEIGHT: 48 - 72" . . . PLANT SPACING: 24 - 36" LIGHT REQUIREMENTS: Sun . . . SOIL / WATER: Average Milk Thistle attracts the huge and amazing Sphinx Moth, butterflies, and HUMMINGBIRDS. The plant does have spines, but parts of it are edible and it has medicinal properties. Due to state regulations, these seeds cannot be shipped to AR.