How long to wait to spray Cornell on new roses?

20 years ago

I just received 3 new rose bushes and am wondering if I need to wait to start them on Cornell. I mean, i don't know what the nursery used on them and don't want to risk burning the leaves if they've used sulfur or something.

What do ya'll usually do?

Comments (2)

Kimm1
19 years ago
If these are potted and already leafed out you could start spraying now, if its necessary. If these are bare root there is no reason to spray until they leaf out.
Field
19 years ago
I disagree on the basis that research has shown that blackspot is carried in lesions on the canes. This is all the more reason to spray the canes thoroughly whether they have leafed out or not.
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How long to wait to spray Cornell on new roses?

Comments (2)

Kimm1

Field

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