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Wisconsin State Horticultural Society / Annual report of the Wisconsin State Horticultural Society for the year ending July 1, 1921
Vol. LI (1921)

Koch, H. F.
Outdoor rose growing,   pp. 157-168 PDF (3.0 MB)


Page 163


WISCONSIN STATE HORTICULTURAL SOCIETY
are through about the first of August. You have your climbers
for quite a long time. Some of them were small flowers, and
some of them were large flowers. The large flowers are really
the best, except the Dorothy Perkins. That is a very fine plant,
very responsive to attention, and very hardy, too. You can al-
most take a chance there, if it is not exposed to the winter winds,
as I have found with them in several locations, where we left
them standing up, that they came through the winter in good
shape. But occasionally you will lose them if you do not take
the precaution of laying them down.
Now, pruning is something that you must learn from experi-
ence. I find that the more vigorous the plant is, the less it should
be pruned, which is the opposite from what you would suppose.
The weaker the growth, the harder the pruning, if you want re-
sults. A vigorous plant, when it is pruned hard, throws very
few flowers. I tried it this spring on a particularly vigorous
plant. After it was through flowering, I cut it right down to the
ground, and instead of -getting good, heavy canes as I expected,
the same as I did the previous year, the canes that did come up
were small and not as strong. Of course, the plant will re-
cover, will probably be so much better the year after next; but
next year I do not think I will have very many real flowers.
Some people seem to experience considerable trouble with
disease. You will find that you will have very little trouble with
disease if your roses are properly planted, and are the right kind
of stock. Own root stock seems to suffer more readily than
budded stock. That is easily explained. They are stronger
and more vigorous, and do not have to fight for existence, and
disease does not get hold of them quite so readily. The one
thing that does trouble everyone, more or less, though, is mildew.
I have been using a lime-sulphur solution. Whether it really
has the effect that is claimed for it or not, I have not fully
satisfied myself; but while the plants are dormant, I take the
lime-sulphur solution as directed, and spray the plants well, and
soak the soil well with it. As a matter of fact I have not any
mildew now, come to think about it, where I did have it before.
It is a preventive rather than a cure. Of course, there is a cure,
and that is by spraying with potassium sulphide. But with
potassium sulphide you have got to be pretty careful. If you
use it a little too strong, the leaves drop off. That is not due
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