continuous fungus on iceberg roses..
HU-726735444
3 years ago
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rosecanadian
3 years agoHU-726735444
3 years agoRelated Discussions
Mycorrhizal fungus for roses
Comments (63)I posted on this thread in 2015... I have been using it for some time, and experimenting for at least 7 years I would say.. I have drawn a conclusion that it is a total waste of money and completely unnecessary. I don't even use it now to alleviate possible rose replant sickness which we get here a lot. Roses cost enough as they are, so we should ask ourselves if we need to add to that expense in this way. Remember too, that it's now big business running the show. I'm not sure why we should ''trust these folks'' when you realise that Mycorrhizal Applications is now a wholly owned subsidiary of Valent BioSciences, whose parent company is Sumitomo Chemical Co. Big agricultural concerns going on there. I liken it to the Pharmaceutical industry telling everybody they need this pill and that pill, when for the most part, we probably don't need any.. I noticed they closed a gap in the market just recently. There was no product for Rhododendrons and Azaleas, as the one out there was for roses. So now I notice - guess what - a mycorrhizal formula for Rhododendrons, all in a nice little sachet and costing equivalent of about 10 dollars or somesuch. I mean really, if you have acid soil who needs it?.. If it makes the gardener feel good, and that's what it's all aimed at I think, people will lap it up, especially if they are encouraged to do so, as we are here by well known writers, gardeners, even the RHS. … they've all been taken in by it... now, you can hardly put anything in the ground without being advised to sprinkle some of this stuff around the roots.. They like to give the impression they are ahead of the game. Well, I'm also ahead of the game - in reverse. I've given it up and relieved I don't feel compelled to add it to my shopping cart every time I want a rose.. Just my 2 pence......See MoreIceberg Rose Northern California?
Comments (2)loribee, from your zone, I'd expect Iceberg to do as well for you as they do here. Do you know what Sunset Zone you are? From 14 through 24 Iceberg does splendidly in SoCal and I can't fathom there would be anything substantially different between up north and here in the same zone ratings, other than, perhaps, soil and water pH. I can't recommend anywhere up there to obtain them, but look around. You can find them EVERYWHERE because they WORK. Kim...See Moreknockout roses spread fungus
Comments (6)Thanks everyone for the responses. I guess it was a little coincidence that the roses had fungus and the only place In the yard to get mushrooms are right next to the roses. The aphids , however, are aphids. Yes, I do work for a small design and build landscape company. Everything I've learned has been from experience. I have studied and taken the Georgia certified landscape professional exam, and failed. But I am still learning new things everyday as you can see. I love this field and will continue to pursue my certifications....See MoreOne VERY sick Iceberg Rose Tree
Comments (5)Ditto HollySprings, but it may not be as bad in Oregon. The brown rotting buds are probably from Botrytis petal blight, which develops in cool, wet weather. Copper can help control it, but you would need to spritz the buds twice a week starting when they first show petal color, if it is raining. In your climate it might be better to find varieties that are resistant, for example Tineke and Kronprincessin Viktoria among the whites. You would probably have to spray Iceberg's foliage for blackspot during spring and fall, beginning with leafout. Organic controls include sulfur, anti-transpirants, and copper (not as safe). Lose the Ortho product-- it is not a good idea to use insecticide when you only need a fungicide. The burnt leaves are from the copper. Be sure the plant is well hydrated before spraying. Spray when it is warm and the spray will dry quickly, but not when it is very hot. There are always threads on the various rose forums about disease-resistant roses, but you need to listen mainly to posters from the NW coast....See MoreDVS inFL (Zone 9a)
3 years agoHU-726735444
3 years agoHU-726735444
3 years agoSheila z8a Rogue Valley OR
3 years agorosecanadian
3 years agoken_adrian Adrian MI cold Z5
3 years agoHU-726735444
3 years agoHU-726735444
3 years agorifis (zone 6b-7a NJ)
3 years agoken_adrian Adrian MI cold Z5
3 years agothreeboxerlover DEZ7a
3 years agoroseseek
3 years agoingrid_vc so. CA zone 9
3 years agoHU-726735444
3 years agoroseseek
3 years agoHU-726735444
3 years agoroseseek
3 years ago
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Dingo2001 - Z5 Chicagoland