You can fix your curling calathea leaves just like this wonderful example. What is wrong? The Type Or Quality Of Water You Use May Cause Leaf Curling. The lower leaves may turn dark green or yellow, and start getting spots or big splotches that look brown, bronze or even a little blue. Hey guys, So I recently started to notice my seedlings leaves turning purple on the edges. × View full size in a new window × View full size in a new window. The plant will become susceptible to disease and toxicity. First apparent on the tips and margins of the leaves. The purple could be a magnesium deficiency which could be caused by poor pH, cold temps or genetics, or a phosphorus deficiency. One common cause of sick calatheas is an overabundance of minerals in the water source. This is by and large brought on by a sudden phosphorus deficiency. Then again it could still be root rot or a watering problem, because that will show drooping leaves and cause nutrient-like disorders to appear. There is some blue/purple "blotches" on the outside edges of old leaves (spreading outward), some tips of leaves and now some newer ones. The nymphs are translucent and can appear to be the same color as the leaves. So your 5 weeks from harvest and your leaves are beginning to turn purple. On the off chance that the temperature dropped to 50 degrees (F.) your plant will increase the up take-up of phosphorus and that will make plants turn purple .Cannabis plants tend to love phosphorus in the blooming/growing stage in the event that you … Christmas cactus are relatively trouble-free succulent plants, but if your Christmas cactus leaves are red or purple instead of green, or if you notice Christmas cactus leaves turning purple on edges, your plant is telling you that something isn’t quite right. I read that it could be related to a phosphorus deficiency, ph lockout leading to the deficiency and or maybe the roots were getting too cold as I had a pretty large fan blowing on them. Read on to learn about possible causes and solutions for reddish-purple Christmas cactus leaves. Calathea leaves curl up as a sign of distress, but the problem might not be immediately easy to identify. Primarily, the fan leaves surrounding the highest cola is where it is most prominent. Lilac leaves are turning purple/red and curling inward. 4. (And How to Fix It) Diseases Can Cause Begonia Leaves Curling. Begonia stem and root rot is a fungal disease which may affect your plant. (dead tissue). SYMPTOMS: Stunted or twisted leaves, white spots or black moldy areas on the top of foliage. Sometimes the stems of the plant turn bright red or purple, but not always. Asked July 1, 2016, 10:54 AM EDT. Problem: A cannabis phosphorus deficiency generally appears on leaves from the lower/older parts of the plant. CAUSE: Whiteflies are small, moth-like insects that cluster on the undersides of leaves. 1 Response. Both nymphs and adults suck the fluids from new growth, which causes fresh leaves to be stunted or twisted. (image source) 5. I've found two or 3 with minor discoloration ontop and one halfway down that is kind of bad. You May Also Enjoy: Why Are My Mint Leaves Turning Purple? Grand County Colorado. Any time you see the curling of the leafs with blotchy spots on them it is most likely pesticide exposure. True. The top leaves are fairly new. In addition to appearing to look like iron deficiency, the tips of the leaves curl and the edges burn and die. Picture included. WHITEFLIES. Curly top virus symptoms vary by host plant; affected tomatoes show symptoms including curling leaves, veins turning purple on the underside of leaves and a light green discoloration. The leaves may thicken and curl, and the affected leaves feel stiff. 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