|I have about 25 rose bushes and I use the Bayer for roses. the direction say to fertilize every 4-6 weeks. It is now 6 weeks and the temps are still in the 90's. Should I fertilize? Also my rose, Mr. Lincoln, has powdery mildew. I thought Bayer would take care of it. What do I need to do?
Thanks for your help
|Bayer products should take care of the powdery mildew. If it does not/has not, you might want to use a different product (sometimes diseases can become immune to certain fungicides). Try Rose Defense, a neem oil based product. As for feeding, I would not use a foliar fertilizer in the hot summer months, but a granular, time release product will be fine for your roses. Good luck with your roses!|