MIKKELSEN & SONS GREENHOUSES 
Ashtabula, Ohio 
Our stock plants are grown in sterilized soil and 
the cuttings are rooted in sterilized sand and peat. All 
stock plants and cuttings are under the influence of incandes— 
cent lights from August lst to May 15tn and are grown under 
automatically controiled temperatures» 
The foliowing information is given as a guide for the 
cultural practices as listed and are not hard and fast rules 
for any particular operation: 
EIGHTS 
8, 9 and 10 week varieties should be lighted from August 
ate cornay (o> tboptour at bud initiation is to be prevented 
and providing the piants are grown at 60° maximum, 11 week 
Vette plese coulda be, Lisnved August 125th to April 15th or May 
lst. 12, 13 and 14 week varieties should be lighted September 
Toone pri dl lcboeco tne 25th, One to two hours of light during 
August should be sufficient, increasing to three hours during 
~vepvember, four hours during October and five hours during the. 
months of November and December and then diminishing during 
January to four hours, March to three and April to two and onee 
SHADING 
8, 9 and 10 week varieties must be shaded from April lst 
to September 15th to insure response to bud initiation. 11 
Week Verieties should be shaded Harch 15th to October lst, and 
12, 13 and 14 week varieties should be shaded from March lst 
toa October 15th, 
SPACING 
Pompons bloomed during November, December and January 
should have 32 sq. in. per stem, October, February and March 
require about 28 sq. in. per stem, and any Pompons flowered 
from April through September should have about 24 sq. in. per 
Stem, Spacing on Mums for the same periods would require 
respectively 36, 32 and 28 sa. in. per flower, 
TILING 
On the last page of this price list is a condensed schedule 
iveweabing planting dates for an unpinched crop. If one is to 
pinch he must add 5 weeks when planting in November through 
February, 4 weeks during April, May, September and October and 
3 weeks growth between plant and pinch through late May and 
August, Short-day treatment may be found by counting back from 
the desired bloom date the number of weeks any particular va— 
riety requires to bloom. For example--to bloom Gold Coast (a 
9 week variety) June 2nd, one must count back 9 weeks from June 
2nd which will be March 3lst as the day to start short day 
treatment (at this time one would turn off lights and start 
shading with black cloth). 
