Why are my RED Knockout roses turning Pink, then almost white?
sbcand
14 years ago
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Comments (7)
dottie_in_charlotte
14 years agodottie_in_charlotte
14 years agoRelated Discussions
Blueberry leaves turning yellow to almost white
Comments (19)Hi Inkfin: I post in Organic Rose forum, and saw the same problem when the nursery used FRESH PINE bark, at pH 4, as the growing medium for a young rose. The leaves turned almost white. I re-posted what you wrote: " I have been watering (rain water) everyday. This plant is in a well container having 50:50 peat moss and pine bark mulch." pH of rain water is 5.6, and pH of peat moss is 4. pH of pine bark mulch is lower than 4 when soaked in water. You got an EXTREMELY ACIDIC medium which result in "acid-burns" in your plant. A quick way to fix is to spread pulverized dolomitic lime (has both calcium & magnesium, at pH 9) ... that will balance the pH. Or use your city tap-water at pH 8.6 to correct the extremely-acidic environment. The good potting soil, the Pro-mix, has peat moss, or composted pine fines (less acidic), plus dolomitic lime (pH 9) and gypsum (neutral pH). See below link for the red-cabbage pH test I did in Organic Rose, which shows how acidic pine bark is. Fresh pine bark is even more acidic than peat moss, when mixed with rain-water. Optimal pH of blueberries is between 4.5 and 5.5 ... folks in Fig Forum tested pine-bark soaked in water, and it registered much lower than 4, plus killed a few plants. Here is a link that might be useful: Red-cabbage pH test of many samples...See MoreThe leaves of yellow Knock-Out turn yellow!
Comments (5)Thanks, is that about a two gallon can? The majority of the foliage which has yellowed seems older leaves, mostly lower on the plant and toward the interior of the bush. That is normal. Foliage requires good light exposure to produce more food than they require. Older foliage is continually shed after the plant reabsorbs the nutrients from it (turning it yellow) to push new growth. Your flowers have only recently shattered. It's too soon to expect that pot bound plant to push any new growth or flowers. The spotted foliage I can tell from the photo is that which has turned yellow. "Yellow" means the plant has sucked the sap from them. That reduces their immune system ability to resist diseases. If that bugs you, pick off all the yellowed foliage. Pinch off the spent flowers, leaving all the green leaves in place. Don't cut down the canes to remove those spent flowers. Leave all the wood and green foliage the plant already has. Plant it. There is nothing I see in that photo to indicate there is anything wrong with the plant other than: Stressed from being in the can too long. Stressed from having temperature, light, watering, etc., change from where it WAS to where it IS. Probably stressed from having the fertilizers the growers push into the plants to get them retail ready (so you'll buy them), mostly washed from the soil due to the frequent watering required to keep that size plant salable in that size pot. Ready to push out new growth once it gets some root room, more nutrients and probably more consistent soil temperature and moisture instead of more widely fluctuating moisture and temps being stuffed into that can subject it to. The foliage just under the flowers (the newest, youngest foliage and growth) appears just fine. It's the oldest and that which is shaded from the best sun exposure which appear to be yellowing. Expect that as that is what happens with ALL plants as they grow. Just provide for this one as you have the others you've grown for years, remembering this one is more "juvenile", more of a "baby" than the adults already in your garden. So, it's going to require a bit more attention and patience as the others did at that "age". Have fun! Kim...See MoreWhy are my white mums turning pink?
Comments (3)I think that is normal, mklady. I have a big white mum in one of my beds. It always starts out yellow and only turns pure white when it is in full bloom. Then it goes through pink and finally to purple (where it is right now) before everything falls off. It made me really nervous the first year but now I kinda enjoy the show....See MoreLa Marne or Double pink Knockout rose?
Comments (26)One year, I lost 35 roses to RRD. I'm down to losing maybe 1 a year because I notice the symptoms earlier now. Pink Double Knock Out is the best KO, I think. I have a whole hedgerow of them, and they do great without feeding or spraying or even irrigation! La Marne looks beautiful! Wonder why I don't have that one? I have an Earth Kind bed, and in the past few years, I've been favoring Kordes roses over the Buck roses that made up most of the Earthkind list. It could be that I've been buying the Kordes roses from Palatine and they come to me much more mature and grafted to multiflora, where the Buck roses come from Chamblee own-root, and much much smaller. They struggle to get established in our harsh conditions, where the Kordes roses grow like crazy. As a matter of fact, I have a problem right now with some of the Kordes Fairy Tale roses. They grew way larger than expected---catalogs say 3-4 feet, mine are 9 feet tall and wide. They bloom constantly, even now, in October, and the foliage is awesomely clean and green! Too bad I have to move them so they don't completely cover my front entrance! I'll look into La Marne too, because those photos Patty posted are really a great endorsement....See Moregaylek
14 years agosbcand
14 years agodottie_in_charlotte
14 years agoUser
13 years ago
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