Black spot on potted rose
Hi All~ I just received 2 own root potted "Ivor's Rose" mail order today and while the plants are huge with lots of new growth the bottom third of the bush's leaves are covered with black spot. I have read that it's very stressful for plants to ship, especially in the height of summer. Should I worry or just let the rose grow and see what happens? The new growth is healthy looking. Ivor's Rose is supposed to be very resistant to black spot so I'm wondering if this may just be due to stress from shipping from FL to MA.
Thanks for any insight or suggestions.