445 Production of Castilleja as a Greenhouse Crop in Wyoming

in HortScience

The objective of this study was to determine if hemiparasitic Castilleja (Indian Paintbrush) could be successfully sown and grown in the same containers with each of three host plants. Perennial Castilleja linariifolia, Wyoming's state flower, was sown in combination with either Helianthus annuus `Pacino', Lupinus `Russell Mix', or Artemisia frigida. Seeds were sown 7 Oct. 1999 in 128-cell plug trays. Trays were then placed on a mist propagation bench at 21 °C until emergence of any plant species was evident. Artemisia emerged 12 Oct.; Lupinus and Helianthus emerged 13 Oct. Plug trays were then transferred to a greenhouse at 13 °C night/21 °C day temperatures under natural light conditions. Plugs were transplanted into 11.4-cm-diameter containers on the following dates: C. linariifolia/Helianthus–12 Nov.; C. linariifolia/Lupinus–18 Nov.; and C. linariifolia/Artemisia–2 Dec. C. linariifolia emerged, after transplanting, on 16 Dec. All three combinations were successfully produced in the greenhouse.

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