Posted: 10/06/2013 at 10:11
Thank you for the suggestions. You are lucky, Woodgreen wonderboy! I know one or two others in the area who have decided to give up on roses entirely for the reason of blackspot. It could have been the timing of spraying - it was a little late this year as the weather conditions didn't seem right. I usually mulch in the spring, Wintersong, but it has recently been suggested to me that mulching should be done in the autumn to avoid trapping the fungus beneath in the spring. I'll try it this year. I am wondering if the fungus spreads far from the affected plant - in other words, will I be able to plant in the spaces between those I have to remove?
On another matter - three years ago one of my daughters gave me a Rosa banksiae lutescens which is growing very healthily in a sunny spot but shows no sign of flowering. Has anyone grown it?
NB so far it is unaffected!!