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Initial post
7 MAY 18 by
vasue
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Vigorous & healthy rose in this seasonally hot & humid no spray VA garden. Generous non-fading blooms of lovely coloration & form drop petals cleanly when spent. Snap deadheading at the peduncle promotes rapid rebloom, showing new buds forming as others are swelling & opening for a steady show. Fragrance of 3 on a scale of 1-10, most notable before 9 am & in the evening here, softly scented with a top note of sweet violet floating on a vanilla base with more floral hints. Grown this rose for 3 years now & added more each year. A rose that just gets better as it matures & continues to delight. Charming rose that loves to bloom. Highly recommend for similar climates.
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Does it get any black spot. I live in Austin Texas, hot 100 plus in summer at times with rain causing more black spot than normal.
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This is an extremely healthy Kordes rose, even by TX standards. I have it no-spray.
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Initial post
7 FEB 17 by
vasue
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How does Love Potion fare on black spot resistance in wet & humid conditions grown no spray?
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I might have gotten a dud or it doesn't like it here in Z8, but so far, LP has been very BS prone compared to my others grown in the same no-spray conditions. I'm really surprised by it actually. Will report back in if I get her figured out! (Mine is own root)
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Lavenderlace: Note the glossy & dark-green foliage on that one. My experience with glossy & dark-green foliage is they like soaking wet ALKALINE clay (high in magnesium). The only time glossy green foliage broke out in blackspots was when I brought the pH lower by giving them acidic brewer's yeast (high in phosphorus). Glossy DARK GREEN foliage does better with potassium & magnesium fertilizer. They do sell such fertilizer with potassium combined with magnesium. Magnesium gives roses' leaves the shiny & glossy foliage. Magnesium is a co-factor for potassium in retaining water in cell-walls. Magnesium raises the pH, thus balance out the acid-component of sulfate-of-potash. Sandy soil is often deficient in magnesium. Magnesium is what makes clay sticky.
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I'm going to follow your advice and put her in some clay instead of the sandy soil full sun spot that I was going to banish her too. She's not enjoying her pot at all. Thanks for the info!
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The poster Fragrantnutter in Rose forum who posted gorgeous bouquets of her roses? She has sandy soil & alkaline tap water in California, but she amended her sand with bentonite clay and uses high potassium fertilizer. Clay helps to retain moisture & nutrients. Potassium, calcium, and magnesium leach out easily in sand .. these are essential for fungal-prevention. Horse manure has calcium (from the lime added), but iffy on potassium & magnesium. The glossy & dark green foliage has a higher need for such nutrients (more abundant in wet clay). I always put the glossy foliage of modern roses in partial shade .. they wilt easily in hot sun. Examples: Pat Austin, Meilland Romanticas such as Sweet Promise 2007 and Tchaikovsky.
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Update: Straw, you were absolutely right about this one! She did not appreciate my fast draining sandy soil at all. I changed up her soil and have been keeping her very wet. What a difference! BS gone and leaves are now dark and shiny. Thank you!
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Lavenderlace: I'm glad that worked for you !! Last week I received 7 own-root roses from Roses Unlimited, and Barbra Streisand has dark-green & glossy foliage ... she wilted & looked terrible in full-sun, so I moved her to partial shade, and she's doing much better. The glossy & dark green foliage HATES acidic potting soil, and prefers a higher pH, so I always put pea-gravel (pH 9, with a variety of minerals), red lava rock (pH 8.2), or my alkaline clay to UP the pH level. Increase the pH level with minerals make the leaves even shinier & glossier.
There's a Texas A & M University study that shows calcium helps with heat-tolerance for plants. At alkaline pH, there's more potassium & calcium available to prevent wilting in hot sun.
Evelyn also has dark-green & glossy foliage and leaves are shiny my alkaline clay. Betty White is another dark-green & glossy foliage that does better in my high-magnesium clay, than in pH 6.5 potting soil. One Hibiscus nursery stated that alkaline magnesium is what makes leaves glossy. I tested that: bought a Carefree Celebration from HomeDepot, and the leaves were dull in a pot. I gave it some "pea-gravel" water, and after a week, the leaves became shiny & glossy.
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That's interesting that you brought up Evelyn. I just put a couple in the ground a few weeks ago that were doing great in the pots. One is covered in blooms now and the other looks a bit sad, side by side. Thanks again for the info!
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