Why are the leaves on my roses turning yellow? (pic)
Garden Mist
7 years ago
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Leaves turning yellow on my tree rose?
Comments (8)Roses don't like reservoirs of water. They want full drainage. If those pots are holding water at the root zone the leaves will yellow and drop. Get them in LARGE pots that have good drainage holes in the bottom....See MoreWhy Are These Rose Leaves Turning Yellow?
Comments (4)@ken_adrian yes most of the yellow leaves are the oldest ones. So no way to avoid that and I should not worry about it? The container mix is 1/3 peat, 1/3 turface, and 1/3 pumice. That is a wet soil but roses seem to like well-drained moisture-retentive soil. In any case, this is just an experiment. So far, this soil is doing the best. The big surprise for me so far has been that 5-1-1 mix has gone nowhere. The plant (identical species from the identical grower) in that soil has not grown at all and looks like it is in shock....See MoreWhy is my prayer plant leaves turning yellow?
Comments (4)I've grown a Rabbit Tracks Maranta for ages and it's common for the old leaves to yellow/brown and die. It's also common for the entire plant to die off and go completely dormant for a short time in the winter. It always starts growing again in the spring though! :)...See MoreWhy is my yuzu leaves turning yellow on just one branch?
Comments (9)A magnesium (Mg) deficiency would present across the entire foliage mass because Mg is a nutrient that is considered mobile in the plant. As such, it can be borrowed from other organs to supply what is needed for new growth. A zinc (Zn) deficiency, because it is considered immobile in the plant, must be present in the nutrient stream at adequate levels at all times. If it isn't, deficiencies show only in new leaves that grew after the Zn became deficient. Generally speaking, when a deficiency of the mobile nutrients (N, P, K, Mg) occurs, it is seen in all foliage, even though roots are first affected. The rest of the nutrients which are absorbed via the root pathway are considered to be immobile or mostly immobile (can't be 'borrowed' to provide the building blocks for new growth). A simple analogy would be, leaves and fruit are having a tug of war to see which one gets the lion's share of food and nutrients. Since we know the pull of unripened fruit is always stronger than foliage (fruit is a more powerful energy sink than leaves), fruit will win every time. When fruit ripens, it's loses it's pulling power, which frees up food and nutrients that allow the leaves to recover to their normal color. I'm not sure what you meant by, "That happens when the trees aren't getting enough potassium and open". FWIW, most hobby growers end up shooting themselves in the foot when they think they have identified 'a nutritional deficiency' and move to treat it by adding an element or compound aimed specifically at correcting a deficiency of individual nutrients. The reasons for the shot in the foot are several. 1) Deficiencies are very often misidentified; or, 2) there might not actually be a physical deficiency of the nutrient the grower thinks (s)he identified as there could be another antagonistic nutrient, available in excess, in play, example: too much Ca limits Mg uptake - too much P limits uptake of K, Ca, Fe, Cu, Z, ....... ; or, 3) a nutrient could be acting as a synergist, example: an excess of K can cause an increase in the uptake of Mn and Fe, causing a toxicity of all three nutrients which would be read as a deficiency of who knows what; or 4) the deficiency could be culturally caused, example: in saturated soils, low oxygen levels cause Fe (iron) and Mn (manganese) to become electron acceptors. This leads to the precipitation of both, even though these elements might be present in soils at normally adequate levels, and the plant’s inability to assimilate them. Soggy soils also make uptake of Ca difficult or impossible. Al...See Morejim1961 / Central Pennsylvania / Zone 6
7 years agolast modified: 7 years agoGarden Mist thanked jim1961 / Central Pennsylvania / Zone 6Garden Mist
7 years agoGarden Mist
7 years agoLaurel Zito
7 years agolast modified: 7 years agoPatty W. zone 5a Illinois
7 years agolast modified: 7 years agoLaurel Zito
7 years agoPatty W. zone 5a Illinois
7 years ago
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Patty W. zone 5a Illinois