I think that you shouldn't bury the crown of the plant. We have a couple varieties, also in raised beds, and from what I have read the crown
should be at ground level not too deep or set too high but I don't know what would happen...maybe a crown rot? We replant every few years with new plants that have formed from the main plant...maybe you could wait until you replant the bed... Hopefully some strawberry expert will
answer your question now.
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