Natural cold stratification. Wildflower seeds that are native to cold regions germinate better if they’re exposed to a cold and moist environment before they sprout. Known as cold stratification ...

Since many columbines require moist stratification ... Before committing fridge space to your seeds, check how long of a cold period your columbine species needs. Those native to warm climates ...

How can I tell which seeds need cold and moist stratification and will be most suitable for winter sowing? Most perennials and native plants need the cold and moist treatment, just as they would ...