Minis - disease resistant ?

townhouserOnt(z6aOnt)December 10, 2004

Hi, I have only 1.5 yrs experience with a few roses, acquired by chance, description below.

In my limited experience with these roses, miniature roses are very prone to powdery mildew and black spot, by comparison to groundcover roses, growing side by side, infecting groundcovers. Some of them were described as disease resistant. I had to remove minis to another side of the house.

Is this common for miniature roses, or it's just my own rotten luck? If there are really disease resistant mini-floras and miniature roses, please advise on what to look for. Any low-growing rose will do, not only minis. Zone 6a, cold wet weather from fall to late spring, Great Lakes, full sun.

I really like HT-shaped large flowers and glossy dark green leaves of Vanilla Cordana and would prefer not to use small- and flat-flowered one, if there will be some choice.

My roses are:

Miniature ones - Vanilla Cordana (robust, big flowers), most common looking such as Sun Blaize (sp?), Parade, and popular "miniature rose", high shrub with bicolor very small flowers (red edges/white centers), miniature only flowers and leaves, not height/width of plant (Magic Carrousel?).

The only other roses I have are Flower Carpet groundcovers, pink, yellow and red (this one is least disease resistant). In comparison to my minis they are care-free.

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Merry Christmas!
(Just to move this post down in the list)

    Bookmark   December 23, 2004 at 7:26AM
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mike_in_new_orleans(9a/ coastal LA)

The use of the term "disease resistant" is really tricky. For one thing, it's relative, as all roses have at least "some" susceptibility to one disease or another if given just the right (bad) conditions. I've found that minis vary in their level of disease resistance just like larger roses do, but in general tend to be similar to other modern roses. It's often helpful to pick the brains of rosarians that live in your location for information of recommended varieties, as it can vary a lot for a given rose variety depending on where it is grown. I am inclined to suggest some of the old garden rose varieties that are especially disease reistant, such as the polyantha Pinkie, or the noisette and china roses that have fairly small blooms, but your climate may be much too cold for them, I don't know. Good luck. I hope someone in your area adds to this thread.

p.s. you probably don't want to hear this, but some regular preventive anti-fungal spraying can work wonders for the health of your roses, even the one's touted as being "disease resistant."

    Bookmark   January 5, 2005 at 11:06PM
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Vic007(z 6/7 RI)

Overall, miniatures are my most blackspot prone roses. Minnie Pearl is the most disease resistant I have. It stays clean with occasional spraying. If I neglect spraying it develops mild BS (25% or so of leaves affected) but does not totally defoliate like a lot of other minis do. Above average in disease resistance relative to other minis are Amy Grant, a light pink, and Breath of Spring, a new light yellow from Bridges. Mildew has not been much of a problem with my minis with the exception of a couple of the dark reds ones - Red Cascade & Miss Flippins. They are my fungicide indicator plants; when they start to mildew, I know it's time to spray.

    Bookmark   January 22, 2005 at 4:46PM
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diggerdave(Montana 4/5)

Interesting. I have always considered minis pretty much bulletproof here. PM can be a problem with some of our big roses. Never seen any pm on the minis. I rarely spray here and don't bother spraying the minis when I do. I'm not an experienced mini grower. I never grew them before I met Deb. The grocery store minis she bought were so healthy and hardy we began getting 'named' minis in 2001.

    Bookmark   January 23, 2005 at 9:54AM
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