flowerbug
Garden Master
as a general hint usually if a plant's seeds need stratification that also means the seeds may persist quite a long time in the soil seed bank so it may take many years to remove them if they're a problem...
i think i may have stated that too strongly, so perhaps i should have written it more as a hypothesis...
of course, then i wander off and look to see if anyone had done any experiments looking into this angle and did not find anything specific and i also ran out of time to look further.
but i did enjoy reading this paper:
Vertical distribution of soil seed bank and the ecological importance of deeply buried seeds in alkaline grasslands - PMC
Soil seed banks play a central role in vegetation dynamics and may be an important source of ecological restoration. However, the vast majority of seed bank studies examined only the uppermost soil layers (0–10 cm); hence, our knowledge on the depth ...
pmc.ncbi.nlm.nih.gov
and then of course... i can't resist one last peek in:
"artificial stratification allowed the emergence of a larger number of species from the soil seed bank, but natural stratification improved estimates of the seed bank density." which is a hint of support for my hypothesis.
arm-chair science at its best... i feel a nap coming on... don't quote me on any of this...
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