Lost in translation – updates on germination requirements

Slowly, as I have the chance to try more species myself, and/or find reliable info, I work on making updates for the germination requirements on the Seeds shop. I already mentioned about Sanguinaria canadensis.

It is easy to ‘get lost in translation’ when reading about various types of morphophysiological dormancies, but a short summary for species from temperate regions that require warm/cold cycle for germination will be as follows:

This dormancy breaking requirement is naturally fulfilled by summer (high temperatures) followed by fall (lower warm temperatures) and winter (cold stratification). Note the need of high followed by low(er) warm temperatures.

Because of the collecting/shop logistics and peoples habit of buying seeds in late fall, this means that such species, when sowed in late fall/winter will need the whole next season to undergo these requirements, although otherwise they would not qualify in the ‘2 year germinators’ category.
So it goes: changed from require ‘cold stratification’ to ‘warm – cold stratification’:

Hydrophyllum virginianum
Hydrophyllum canadense
Aralia racemosa
Prosartes lanuginosa (moist packed seeds available this fall I hope)
Ilex verticillata

Hydrophyllum virginianum seedlings, seed sown fall 2015, too late for the warm treatment, germinated this spring (2017)

Prosartes lanuginosa: seeds sown after collecting in early September 2016 – germination right now (I only had about 9 seeds)

Other warm/cold germinators that we already know about and I already posted pictures (many require moist storage): most Corydalis, Allium tricoccum, Asarum canadense and europaeum, Saruma, Anemone quinquefolia and A. nemorosa, Dicentra (D. formosa in the featured image), Thalictrum thalictroides, Jeffersonia, Hepatica….

Corydalis nobilis seedlings