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Common NameScientific NameCollection PeriodNotes on CollectingNotes on Treatment for Spring Sowing
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American Beauty-berryCallicarpa americanaAugust - September, can persistDe-pulp and dry.
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Angel's TrumpetDatura innoxiaSoak seeds for 24 hours prior to planting.
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Anise hyssopAgastache foeniculumFallEasy to start from seed.
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Blue MistflowerConoclinium coelestinumSow in fall OR will benefit from 3 months cold-moist stratification. Seeds can be allowed to dry out before sowing.
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Brown-eyed SusanRudbeckia trilobaFallNutlets turn charcoal-gray at maturity, 3-4 weeks after bloom. Seeds are easier to collect after cones lose their tight, compact structure.Propagates easily from seed sown in fall or spring. Store dry in sealed refrigerated containers.
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Butterfly-weedAsclepias tuberosaLate summer/early fallPods contain humdreds of seeds with silky hairs. Allow seeds to completely mature before collecting.
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Coastal Plain Joe-pye-weedEutrochium dubium
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Common MilkweedAsclepias syriacaCollect when mature. Pods are ready when seams split. Avoid pods with milkweed bugs; seeds less viable.Cold stratification important to germination success. See steps required prior to spring planting.
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Culver's RootVeronicastrum virginicumSow in fall OR seeds benefit from 3 months cold-moist stratification. Seeds can be allowed to dry out before sowing. They require light to germinate.
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Dense Blazing StarLiatris spicata[Summer/fall]Wait until entire seedhead has turned fluffy tan. Air-dry stalks inside, then brush nutlets from heads.Scarifiation for sowing in let fall OR store stratified with chaff (3 months @ 40°) for spring sowing.
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Evening PrimroseOenothera biennisAugust to NovemberSow unstratified seed in fall OR dry stratification greatly increases germination rate for spring sowing.
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Four o'ClocksMirabilis jalapaStratification could be helpful
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Golden AlexandersZizia aureaPlant stratified seed in fall. Seeds germinate best in cool soil.
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False Indigo-bushAmorpha fruticosaLate summer/early fallCollect seeds when pod turns yellowish brown and begins to dry.Air-dry and store in sealed, refriferated containers for 3-5 years. Nick seed and soak in hot water for 10 minutes OR scarify in concentrated sulfuric acid 5-8 minutes.
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Golden St. John's-wortHypericum frondosum 'Sunburst'Sow seeds indoors 2-3 months before last spring frost.
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Gray's SedgeCarex grayiSow in fall OR cold-moist stratification for 3 months prior to spring sowing.
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Hairy Beard-tonguePenstemon hirsutusGermination is best with cold-moist stratification.
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Hardy BegoniaBegonia grandisSow indoors in late winter for transplanting outdoors after danger of frost has past.
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New York IronweedVernonia noveboracensis[Summer/fall]Nutlets mature 3-4 weeeks after bloom period.Benefits from 3 months cold-moist stratification in refrigerator. Germination is low so sow thickly.
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OxeyeHeliopsis helianthoidesPropagate in fall or early spring.
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Pink TurtleheadChelone lyoniiFall, at or near firt frostPapery capsule turns darker brown when seeds are mature. Air-dry capsule and separate seeds.Sow in fall OR store in sealed, refrigerated containers. Moist-chill stored seeds 6 weeks prior to sowing.
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Purple ConeflowerEchinacea purpureaFallBreak open mature seedheads to extract seeds.Sow in fall OR store and sow in spring. Cold-moist stratification for 2 months improves germination.
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River OatsChasmanthium latifoliumFallGerminates and grows easily at any time.
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Scarlet Rose-mallowHibiscus coccineusFallEasily grown from seed.
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Spotted BeebalmMonarda punctataSeptember or OctoberSow seed in fall OR use dry or moist stratification for sowing in spring.
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Wild IndigoBaptisia australis[Fall]Separate seeds from mature black pods.Allow to dry prior to storing in dry conditions befpre planting.
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