Were there salt-tolerant crops that could be grown aboard ship to provide fresh food?
Short answerNo established example is supplied. Mushrooms are suggested uncertainly, and the later identification of wheat sprouts is also tentative.
NotesMushrooms or other fungi are suggested tentatively, without a known trial being identified. A later exchange mentions sprouts on Chinese ships, with wheat offered only as a guess. Neither suggestion establishes a tested shipboard food supply.