i was advised at a garden centre to spray with copper in january, including the ground all around the roses. apparently the spores are also windborne, so they are likely to be everywhere. and then after pruning, the mulching, and a dressing of potassium to boost the immune system of the roses. it seems to have worked quite well so far! i was told not to use copper later in the year, better to spray with epsom salts - less damaging to the ecoflora.
I don't know if I am right about this, but it seems to me that species roses are much more resistant than hybrids. Also , really well-fed roses are more resistant to everything. Blaack spot is a curse here in Wales, and I'll remember the tip about copper and use it next year. I've been spraying with a systemic fungicide.
No blackspot is disfiguring and unsightly. Many roses are prone to it. In the past there was sulphur pollution in the air which kept it in check, especially in cities. Now the air is cleaner it is prevalent.
I'm used to the fact that many of my roses would get blackspot on the leaves (agree, Welshonion), we previously live in wales) but I've never had the whole plant die back before - you can see the stems being affected one by one. I cut them off but within a day or two another will start to go and complete die-back happens very quickly.
I've looked on the RHS site, and nowhere does it mention copper or Epsom Salts as a treatment for blackspot. Has there been wrong advice or misunderstanding?
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i was advised at a garden centre to spray with copper in january, including the ground all around the roses. apparently the spores are also windborne, so they are likely to be everywhere. and then after pruning, the mulching, and a dressing of potassium to boost the immune system of the roses. it seems to have worked quite well so far! i was told not to use copper later in the year, better to spray with epsom salts - less damaging to the ecoflora.
Oh, thank you. I'll try it, starting with the epsom Salts!
Blackspot is a result of clean air. It was not nearly so prevalent when there was sulphur in the air from factories and the like.
so then blackspot is good!
I don't know if I am right about this, but it seems to me that species roses are much more resistant than hybrids. Also , really well-fed roses are more resistant to everything. Blaack spot is a curse here in Wales, and I'll remember the tip about copper and use it next year. I've been spraying with a systemic fungicide.
No blackspot is disfiguring and unsightly. Many roses are prone to it. In the past there was sulphur pollution in the air which kept it in check, especially in cities. Now the air is cleaner it is prevalent.
I'm used to the fact that many of my roses would get blackspot on the leaves (agree, Welshonion), we previously live in wales) but I've never had the whole plant die back before - you can see the stems being affected one by one. I cut them off but within a day or two another will start to go and complete die-back happens very quickly.
I've looked on the RHS site, and nowhere does it mention copper or Epsom Salts as a treatment for blackspot. Has there been wrong advice or misunderstanding?