PETERSON & DERING 
ROSE GROWERS 
*‘Oregon’s Best Source of Good Roses’’ 
JANUARY 
This is a good month for dormant 
spray. When we have a few dry days 
get busy, first pick up and dispose of 
old leaves from the ground and re- 
move any foliage which persists on 
the canes. Such leaves are an impor- 
tant source of disease infection. Spray 
bushes thoroughly with commercial 
LIQUID lime—sulfur at rate of ONE 
gallon to EIGHT gallons of water. 
APRIL 
It is well to spray or dust the bushes 
regularly every TEN days. During 
the latter part of month, an applica- 
tion of complete chemical fertilizer, 
4- 12-4 formula, at rate of about TWO 
pounds per 100 square feet. Water in. 
JULY 
Spray or dust at regular TEN-day 
intervals. DO NOT spray or dust 
when temperature is above 85 degrees. 
Water beds at weekly intervals. DO 
NOT FERTILIZE. During latter 
part of month cut back some of the 
more “stocky” canes about SIX inches 
to stimulate new growth for the fall 
blooms. 
OCTOBER 
Spray or dust at TWO-week inter- 
vals, thereby making disease easier to 
control the following season. No 
water or fertilizer is needed this 
month. 
ROSE CALENDAR 

FEBRUARY 
If bushes have not been given a dor- 
mant spray in January they MUST 
be sprayed the forepart of this month 
or else spray injury to the new shoots 
will result. If the buds have started 
growing before the bushes can be 
sprayed, decrease the strength of the 
LIQUID lime—sulfur, using ONE 
gallon to TEN or TWELVE gallons 
of water. Around the 15th of the 
month apply from FOUR to SIX 
inches of cow manure to the beds. 
MAY 
Spray or dust at regular TEN day in- 
tervals. Apply complete fertilizer 4- 
12-4 formula, at weekly to 15 day in- 
tervals at rate of TWO pounds per 
100 square feet, water in. It is well 
to give the beds a good watering every 
week. Hybrid Teas can be disbudded 
at TWO-THREE-day intervals, 
leaving only the terminal bud on a 
shoot. 

AUGUST 
Spray or dust at regular TEN-day in- 
tervals. Water, SOAK beds at weekly 
intervals. DO NOT apply any fer- 
tilizer on the bushes during this 
month or root injury may result. 

NOVEMBER 
It is advisable to give your bushes a 
preliminary pruning or “topping” to 
minimize possible root damage during 
high winds and early frost. New roses 
may be planted this month. 
Courtesy Portland Rose Society 
Scappoose, Oregon 

MARCH 
Weather regulates your pruning dur- 
ing this month, it is always safe to 
prune from the middle of this month 
to the latter part so that a late frost 
will not kill premature growth. Spray- 
ing or dusting for the control of dis- 
eases and insect pests should begin as 
the first leaves unfold, which will gen- 
erally take place the latter part of 
March. 

JUNE 
Spray or dust at regular TEN-day 
intervals. Water beds well at weekly 
intervals. A mulch of some sort 
should be applied to the soil during 
this month if cow manure has not been 
previously applied to hold moisture. 

SEPTEMBER 
Spray or dust at FIVE- to SEVEN- 
day intervals. Failure to spray or 
dust at regular intervals during this 
month will allow mildew to get a 
start and ruin your blooms for the 
fall bloom. Water, SOAK beds at 
TWO-week intervals if rainfall for 
the month is below normal. Apply 
complete chemical fertilizer at week- 
ly intervals, beginning the first week 
in September. 

DECEMBER 
New roses may be planted from the 
latter part of November up until 
May Ist. A winter spray of lime,and 
sulphur may be given if dry weather 
prevails. 

