See 1792.
1788. Saw garget, sow-thistle, etc.M. Cutler, Life, &c. (1888), i. 422. (N.E.D.)
1792. The Garget (phytolacca decandra) is a valuable plant. Its berries yield a beautiful purple juice, which might be used in dying.Jeremy Belknap, New Hampshire, iii. 125.
1826. The root, commonly called Garget, will kill horses, when only a small quantity is eaten.Mass. Spy, June 7.
1826. Unless what B. Tabor calls garget is very different from the vegetable bearing [that] name with us, it is very improbable that it would produce any serious effects.Id., July 26.