Lots of Growth on Rose but No Flowers
I have three Blanc Double de Coubert Rose plants that I have had for 4 years, and they very rarely flower, maybe one or two each year. I have tried cutting them right down to the ground. They are all in different aspects of the garden and grow beautifully. The leaves are perfect but no flowers. Have you any suggestions, please?
I am surprised to hear this as this white rugosa rose is usually a bloom machine. I wonder if it could be the typical problem of using a rose food or fertilizer that is too high in nitrogen? This is usually the case when it comes to alot of foliage production and not many blooms. Check the NPK of the fertilizer you are using. If the first number the N in NPK is quite a bit larger than the others, the nitrogen level could well be your problem here. In such a case I recommend switching to one that is more balanced. Perhaps one that is organic based with some alfalfa and or kelp meal in it. Locally I love Gro-Rich Rose and Perennial Food and Mile Hi Rose Food. Rose Tone by Epsoma is another good one. Be sure to water them well before feeding them too. Be sure they are getting plenty of sun to help promote blooming.