Seed Pre-treatments

No pre-treatment

Agastache, Agavaceae, Aloinopsis, Antimima, Arbutus, Artemisia, Aster, Bouvardia, Buddleia, Calandrinia, Calylophus, Calyptridium, Centaurium, Cerastium, Chamaebatiaria, Chamaechaenactis, Chilopsis, Clementsia, Crassula, Delosperma, Dianthus, Dracocephalum, Dudleya, Enceliopsis, Ephedra, Erigeron, Haplopappus, Heuchera, Houstonia, Hymenoxys, Lepidium, Leucophyllum, Ligularia, Mimulus, Monarda, Monardella, Oenothera, Origanum, Penstemon hallii, P. harbourii, P. clutei, Petrophyton, Physaria, Potentilla, Ramonda, Salvia, Sedum, Silene, Talinum, Townsendia, Yucca, Zauschneria, Zinnia.

Stratification (Artificial Winter Or Cold/Damp Storage)

Abronia, Acaena, Adenophora, Aethionema, Akebia, Allium, Amsonia, Androsace, Anemone, Anemonopsis, Angelica, Antennaria, Apiaceae, Aquilegia, Arabis, Arctomecon, Arenaria, Argemone, Arisaema, Asarum, Asclepias, Asyneuma, Balsamorhiza, Berberis, Calochortus, Caltha, Camassia, Campanula, Cardiocrinum, most Cactaceae, Castilleja, Cercocarpus, Chaenactis, Chimaphila, Chionophila, Claytonia, Clematis, Collomia, Corydalis, Cryptantha, Cusickiella, Cymopterus, Delphinium, Dicentra, Dodecatheon, Douglasia, Draba, Echinacea, Eriogonum, Eritrichium, Erysimum, Erythronium, Fraxinus, Fritillaria, Gentiana, Gilia, Hulsea, Ipomopsis, Iridaceae, Kelseya, Leptodactylon, Lesquerella, Lewisia, Lilium, Linum, Mertensia, Paeonia, Parrya, most Penstemon spp., Phlox, Polemonium, Primula, Pulsatilla, Salvia, Saponaria, Saxifraga,Scutellaria, Stachys, Synthyris, Trollius, Veronica, Viola.

Scarification (Pour 165°F Water Over Seed And Let Stand Over Night Until Plump)

Amorpha, Arctostaphylos*, Astragalus, Baptisia, Caesalpinia, Callirhoe*, Caragana, Cassia, Ceanothus*, Cercis*, Dalea, Iliamna, Ipomoea, Lathyrus, Leucocrinum*, Lupinus, Sphaeralcea, Sophora, Oxytropis, Pelargonium, Trifolium.
Note: an asterisk (*) following indicates the need for stratification as well.