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black spot
I have had an Arthur Bell bush rose in a huge pot for about ten years with no problems but this year it had severe black spot. I have noticed that the black spots are even all over all of the woody stems. Can it be saved or should I give up, replace the compost and buy a new one?
In London. Keen but lazy.
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Personally I'd start again. I've found it difficult to reinvigorate older roses after serious black spot. Some have come back but it's constant attention and some time's it just easier to cut your losses and start again plus the cost of roses means they are easily replaceable.
Thanks Dave. I'm sure you're right. This rose is easy to come by and worth getting again. I'll wait until the last buds have finished and give it a decent burial.
I thought black spot was a way of life with rose these days along with aphids, that it rarely kills a rose and that they will produce fantastic flowers even when infected. You buy resistant roses but after a few years the fungus mutates and then can infect the newer roses. My standards have had black spot on and off all summer dependant on the weather.
The key to avoiding it is to burn all the leaves in autumn to destroy the spores and they to spray regularly from spring onwards.
I would give up but my two rose standards our from our wedding
& smell fantastic when in flower.
My others are mini 'angel wings' roses and seem to be resistant (atm)
This rose has a wonderful scent. The flowers look great with toadflax running through them. It flowers all year. It was happy in a large container and was disease free for about ten years.
I know this was a dreadful year for black spot. (I blame Blind Pugh, myself!) so I'm going to give it another go.
I don't think Fungus clear ultra been blacklisted yet but I'm not sure how effective it is. My roses didn't get black spot badly, and it seemed to come and go all summer but I do not know whether it was the changable weather or the spray
At the beginning of this year I looked up organic blackspot controls and the three things that came up were Flowers of Sulphur, Milk and Bicarbonate of soda. I sprayed weekly alternating them for about three months and then didn't have the time to continue. I definitely had less blackspot than last year but I did have some after I stopped spraying. Don't know really if it was weather or the sprays that helped.