HARVEST TIMING AND HEIGHT OF CUT EFFECT ON SAGE (SALVIA OFFICINALIS)

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  • 1 Department of Horticulture & L.A., Oklahoma State University, Stillwater, OK 74078

Dalmation sage was transplanted in rows 92 cm apart with in-row spacing of 30 cm on 12 April 1989 at the Vegetable Research Station, Bixby, Oklahoma. Plots one row by 55 m long were established to determine the best timing for harvest and to observe the effect of cutting height and date on yield and regrowth in the fall and regrowth the following season.

Four harvest dates in 1989 were 15 August, 25 August, 18 September and 8 November. In addition, one half of the plots harvested 15 August were recut on 5 November. Cutting height was 10 cm on 15 August, 12 cm on 25 August and 15 cm at all other harvest dates in 1989 and 1990. Four harvests were made on all plots during the 1990 season except those cut or recut in November 1989. Spring 1990 regrowth was very poor and no harvest was possible in April 1990 on November 1989 harvested plots. Highest total dry weight yields for the 1989 and 1990 seasons were produced by the 15 August initial cut with a 5 November recut (11,522 kg·ha-1) and the 8 November 1989 cut plots (10,881 kg·ha-1). Other plots that were harvested once in August or September 1989 plus four separate harvests in 1990 produced a total yield near 9,500 kg·ha-1. The 15 cm height of cut appeared to be superior to cutting closer to the soil.

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