Dahlstrom & Watt Bulb Farms
"Growers for a Growing World"
The "bud stick," a device used to determine the time required to open flower buds at a given temperature. The stick is used by placing the end against the base of the bud, at the bud base-pedicel junction. A the bud tip, the number of days until flower opening is read for the different temperatures. Note: The distance from each line has to be 1 cm.
Easter Lily Bud Development Meter created by P. R. Fisher, J. H. Lieth & R. D. Heines