HYACINTHS 
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Just what is quality in Hyacinths? Only three factors really 
count: general health, the number of bells per perfect spike, and 
the relative ease of forcing. These factors are influenced by the soil 
in which the bulbs are grown, by the inherent strength or stamina 
of the propagating stock, by the time of lifting and by the curing 
process. These four conditions, all of which must harmonize and be well 
understood, pre-determine your results, provided your part in the final 
flower production is done right. 
We have made Hyacinths a specialty for over one hundred years, 
without interruption. The experience of several life-times has perfected 
our judgment, and has brought us into possession of the finest Hyacinth 
soils in Holland. Our formulas for propagation, lifting and curing are 
tested by time and by customers’ experience. 
SINGLE RED and ROSE 
As a rule, forcing of non-prepared Hyacinths can be started between 
Christmas and New Year. Give 70° F. for a week or ten days, until 
buds are visible; then temperature can be dropped to 65° F., which 
makes for sturdier plants. Keep fairly dark; never allow full sun on 
Hyacinths in the greenhouse. Bulbs must be well rooted, before we 
start forcing. For best results with each variety, follow our hints as 
closely as possible. 
GARIBALDI, red, force from December 24th on, ready from about Janu- 
ary 20th on. Use only topsize bulbs of this variety for earliest work. 
GERRIT VAN DER MEY, rosy-pink, broad compact truss with large 
bells. Start forcing January 1st, blooms from January 25th on. 
GERTRUDE, rose-pink. Force from January Ist. Ready from January 
25th. Very good also for late pans. Use topsize bulbs. 
Many florists with flowerstores can profitably handle Hyacinths 
grown in pure water. Provides a novelty. Upon request, we furnish 
a pamphlet with 10 best varieties and cultural directions, also address 
where suitable Hyacinth glasses may be obtained. 
IMPERATOR, bright rose. Increasingly popular; force from December 
20th, in bloom from January 15th on. 
JAN BOS, striking deep red, begin forcing December 20th, in bloom 
January 15th, extra early red. 
LADY DERBY, early light pink. Start forcing December 24th. Blooms 
from January 20th on. Large bells, but not always a very big 
spike; therefore, use large bulbs. 
