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..the new ROSE season 2020...

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  • edhelkaedhelka Posts: 2,351
    edited May 2020
    @Omori @Lizzie27 I believe plain sulphur can burn leaves (and is used while plants are dormant) but maybe I am mistaken. Here are two articles/tutorials: Lime and Sulfur Spray and using sulphur dust.
    I am finding some info about sulphur being banned in the UK for use as a fungicide (and can only be marketed and used as soil acidifier or soil nutrient), if this is true, how can a product such Sulphur Rose exist?
    For this reason, I would guess that Sulphur Rose has to be some other sulphur-based compound, not just plain yellow sulphur.
  • KatsaKatsa Posts: 278
    What's your opinion on the Peter Beales awakening rambler? I saw that it only has moderate disease resistance so I'm wondering if that means it's a bad call to plant near another rose? The colour looks beautiful so I'm tempted...
  • newbie77newbie77 Posts: 1,838
    @Mr. Vine Eye, 😂😂

    South West London
  • OmoriOmori Posts: 1,674
    @edhelka I searched high and low for the composition of Rose Sulphur and found this: 

    Elemental Sulphur 90% + Inert carriers 10%.

    Not sure what exactly are the inert carriers but I read somewhere else that fatty acids are mixed with sulphur to treat roses, so perhaps that’s part of it. 

    Regarding leaf burn, the RS also says to use it on cloudy days, most likely it will burn the leaves otherwise. 

    Regarding the ban of sulphur, I could only find that specifically, Vitax’s product ‘Yellow Sulphur’ was withdrawn for use as a fungicide. I couldn’t find out why it was withdrawn either, that would be useful to know. But it’s interesting that sulphur can still be used as a fungicide. Must be the ratios/type of Sulphur in the Vitax YS that was the problem. 
  • OmoriOmori Posts: 1,674
    edited May 2020
    @katsa I don’t know that rambler but I would only avoid those with a poor disease resistance rating, personally. Moderate/average, I would still grow, if I liked everything else about it. 

    For example, Mme. Alfred Carriere is listed as average, but it’s a beautiful rose. 
  • KatsaKatsa Posts: 278
    @Omori - That's my gut feeling as well. I will keep looking ...
     
  • Lizzie27Lizzie27 Posts: 12,494
    @Omari, @edhelka, I rather think my Yellow Sulphur was Vitax, will have to drink up my coffee and go have a look in the shed. I was only thinking of sprinkling on the soil around one rose to see if it warded off black spot, on the grounds that if black spot wasn't around when everyone had coal fires, would sulphur dust have a like effect?
    North East Somerset - Clay soil over limestone
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