Mean. Chound. Floweung. of Chrysanthemums. 
Since the advent of daylength and temperature control we have seen chrysanthemum cut flowers on 
the markets every month since 1946, thanks to our never-tiring research workers in various federal 
and state institutions. Season has been eliminated and the flowering time can be accurately controlled. 
Daylength Control 
When Chrysanthemums are grown around the year it is very necessary that we know when to apply 
shade or light to make the plants respond as we desire. The following schedule will give you the proper 
dates for lighting and shading for each response group. 
YEAR AROUND LIGHTING AND SHADING SCHEDULE 
Shading to Lighting to Start Shading to Start Lighting to 
Response Group Stop in Fall in Fall in Spring Stop in Spring 
7 week Sept. 1 July 21 Apr. 14 May 26 
8 week Sept. 8 July 28 Apr. 7 May 19 
9 week Sept. 15 Aug. 4 Mar. 31 May 12 
10 week Sept. 22 Aug. 11 Mar. 24 May 5 
11 week Sept. 29 Aug. 18 Mar. 17 Apr. 28 
12 week Oct. 6 Aug. 25 Mar. 10 Apr. 21 
13 week Oct. 13 Sept. 1 Mar. 3 Apr. 14 
14 week Oct. 20 Sept. 8 Feb, 25 Apr. 7 
Lighting 
To prevent formation of flower buds the light intensity must be 10 foot candles. 
When lighting an entire house the lamps should be installed in the ridge of the house. Usually we 
figure that it requires |!/> watts per sq. ft. of area covered that includes benches and walks. For 
smaller installations the spacing given below will be satisfactory for a bench 42" to 48" wide: 
60-watt lamps in a reflector, spaced 4 feet apart, 2 to 3 feet above the tops of the plants. 
100-watt lamps in a reflector, spaced 6 feet apart, 2 to 3 feet above the tops of the plants. 
Lights must be used according to the schedule above. It has been found that best results are secured 
by interrupting the night. Begin lighting at 10 p.m. for the number of hours shown below: 
ADDITIONAL LIGHTING SCHEDULE 
3 Hours during the months of August, September, October, March, April and May. 
4 Hours during the months of November and February. 
-. 5S Hours during the months of December and January. 
