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Asked by Andy Charles ·July 17, 2018 ·21.7k readers

Fpj

How do I go about gathering Sylvania the invasive water plant, how long should I let it dry before I make ferment after taking it from the lake?

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From the KNF library

From the KNF library Drafted by Claude from Office Hours and the books · Sep 2026 · 3 sources

The library says nothing about Salvinia or about drying plants before fermenting. It does cover gathering and timing.

  • Pick healthy, vigorous plants with no dead or dying leaves. (Student's Manual, Basic Course, p. 36)
  • Take the growing tips just before sunrise. (Student's Manual, Basic Course, p. 36)
  • Do not rinse them. Their surface microbes do the fermenting. (Student's Manual, Basic Course, p. 32)
  • Skip plants collected during or after rain. (Student's Manual, Basic Course, p. 32)

Seaweeds are on the list of plants used for FPJ. (Student's Manual, Basic Course, p. 32) Not all plants give up juice equally. Drake's answer for slow plants is fine salt, up to 10% of the sugar weight. (Office Hours Ep. 40, 8:50)

Once packed, the library gives a fermentation window of 2 to 3 days, and no more than 7. (Student's Manual, Basic Course, p. 36) Watch a lake plant closely inside that window.

The library does not say whether Salvinia will ferment or putrefy. Drake's answer above speaks to that.

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