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REG. U. S. PAT. OFF 
The Root Forming Chemical 
Developed by Boyce Thompson Institute for Plant Research 
WHAT HORMODIN IS. "HORMODIN" is a 
hormone-like plant growth substance. Its 
principal use is to stimulate rapid root 
growth on cuttings. It has widespread use 
in propagating cuttings, whether rooted 
with ease, or normally rooted with difficulty. 
Many cuttings formerly impossible to pro¬ 
pagate may now be rooted with the aid of 
Hormodin. 
WHAT HORMODIN DOES. The Hormodin 
treatment is simple, economical, and scien¬ 
tific. It saves time, space and labor. Hor¬ 
modin makes it possible for growers to re¬ 
produce plants from cuttings with high per¬ 
centages of successful results. 
HORMODIN HAS WIDE APPLICATION. For¬ 
tunately, the growth substances are not spe¬ 
cific for certain varieties or groups of plants. 
This is particularly true with respect to cut¬ 
tings treated with water solutions of Hor¬ 
modin. 
Different plants require different treat¬ 
ments as to the concentration of the Hor¬ 
modin solution, and the number of hours of 
treatment required. Growers are urged to 
follow directions, a copy of which is en¬ 
closed in each package. 
To treat cuttings with Hormodin, merely 
place the basal ends of the cuttings in a 
Hormodin solution of recommended strenth 
for a designated period of 4 to 48 hours. 
The cuttings are then removed from this 
solution and planted in a propagating 
bench, as in methods normally used. Cut¬ 
tings so treated root quicker, and have more 
growing roots per cutting. 
ADVANTAGES OF PROPAGATION FROM 
CUTTINGS. Hormodin makes it possible for 
growers to propagate practically all varie¬ 
ties of plants from cuttings. With Hormodin 
such plants as evergreens, deciduous shrubs, 
fruit, nut and forest trees, sub-tropical and 
tropical fruits, herbaceous perennials, roots, 
sprouts and annual flowering plants, can 
now be propagated in higher percentages. 
Growing plants from cuttings offers many 
distinct advantages. Germinating plants 
from seed often involves high labor costs, 
loss of expensive seed, and presents many 
hazards. Reproduction of many species 
from seed is a slow process. There is, at 
times, a wide variation in the results of 
types of plants that grow from seed. Many 
plants do not come true from seed. 
To treat cuttings, the basal ends are left 
immersed in the solution to a depth of three- 
quarters of an inch to two inches for the 
recommended period of time. At the end 
of this period, the cuttings are removed 
from the Hormodin solution, washed off 
with fresh water, and are then ready to plant 
in the rooting medium. From here on, with 
but a few slight modifications caused by 
the rapid and abundant root growth induced 
by Hormodin, the care of the cuttings fol¬ 
lows approved propagation practice. This is 
completely described in the Hormodin direc¬ 
tions. 
DEPENDABILITY OF PERFORMANCE. Hor¬ 
modin brings dependable performance from 
plant cuttings at low cost. For a fraction of 
a cent per cutting, Hormodin increases the 
percentage of cuttings that root. The 
method of treatment is safe, certain, eco¬ 
nomical, and scientific. 
Due to the rapid growth of abundant healthy 
roots, Hormodin-treated plants mature 
more quickly, and frequently flower more 
profusely. 
Hormodin is tested for plant growth po¬ 
tency by the Boyce Thompson Institute. 
You purchase Hormodin on the basis of 
units of root-inducing power. The rigid 
chemical control in manufacture main¬ 
tained in the laboratories of Merck & Co., 
Inc., by a staff of chemists long experienced 
in the manufacture of fine products similar 
to Hormodin, assures you of a high standard 
of uniform purity. Scientifically designed 
containers, convenient to use, bring Hor¬ 
modin to you in a pure, potent condition, 
ready for use. 
Nurserymen, greenhousemen, and other 
large growers will be particularly interested 
in the large economy packages. Each pack¬ 
age contains a calibrated easy-to-use meas¬ 
ure, complete directions, and a treatment 
chart. Order Hormodin today. 
Size of Packages Price per 
in B.T.I. Units Package 
20.$ 1.00 
60. 2.00 
240 . 7.00 
480 . 13.00 
960 . 24.00 
