Rose planting question
Hi all. Last year I planted a rose, Natasha Richardson, in a large container. I’ve not been happy with it...attractive to saw fly, prone to black spot, flowers not as fragrant as I would like and a bit sparse. I would like to replace it with a different, recommended rose. Do I need to replace all the compost before I plant the replacement, or can I get away with just replacing half?
Many thanks for any advice.