Late Boneset Seeds / Eupatorium serotinum
A beautiful plant with reddish-purple stems and sprays of small white flowers. An absolute powerhouse pollinator food source - it attracts the most diverse set of insects we see among our plants and serves as a nectar source for migrating Monarch butterflies in the fall. It can look somewhat bedraggled in spring, but that is actually a really good thing because the source of the bedragglement is caterpillars feeding. The plants generally make a full recovery and look great later on.
It prefers at least medium soil moisture and can begin to lose leaves if the soil dries out too much. The plants have hundreds to thousands of small white blooms which can also take on a lovely pinkish hue.
Approximate Seeds Per Packet: 300
Germination: Cold(90); Outdoors
Lifecycle: Perennial
Sunlight: Full, Part
Soil Moisture: Moist, Medium
Height: 6
Bloom Period: August-October
Bloom Color: White
USDA Zones: 3-9
Attracts: Bees, Butterflies
Larval Host For: Clymene Moth, Three-Lined Flower Moth
Seed Planting/Germination Key
Storage: Store in a cool, dry, dark place prior to planting.
Rule of thumb for depth of planting: The maximum depth should generally be half the width of the seed, but many wildflower seeds will germinate well if sown on the surface.
Easy: Generally germinates within 5 to 30 days with no need for cold pretreatment. Keep potting mix or soil consistently moist during the germination period.
Cold(30): Germination rates are higher if cold pretreatment applied either by placing the seed within moist paper towel or sand within a refrigerator for 30 days or outside in late winter.
Cold(60): Germination rates are higher if cold pretreatment applied either by placing the seed within moist paper towel or sand within a refrigerator for 60 days or outside in mid-winter.
Cold(90); Outdoors: Germination rates are higher if cold pretreatment applied either by placing the seed within moist paper towel or sand within a refrigerator for 90 days or outside in late fall or early winter. The best route is to plant these outdoors in either a pot or directly on the soil.