Colchicine is used to treat gout. If you have gout, you take
1 pill per hour until the pain subsides. Usually 3-4 pills
are ingested to bring relief.
A single 0.6 tablet disolved in water as described above can
treat around 30 seedlings that then (hopefully) grow
50 to 100 times larger. So the potential residue in a crop of
30 grown plants would be 0.6mg max. This is tiny compared to
the therapeutic dose a gout sufferer uses. Homeopatic for
all practical purposes.