Help needed w/ sick magnolia (yellow leaves)
smo5n
20 years ago
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Pterostyrax
20 years agoRelated Discussions
Yellowish leaves on my yellow magnolia
Comments (4)You should have a soil test done, mainly for acidity, soil composition, and basic nutrients. People might recommend fertilizer, but trees really don't need that - and most certainly not to maintain green foliage in normal conditions. Fertilizer may do more harm than good, especially if the soil ph is the problem. There are several factors that could be the cause of the yellowing - IF that's really a problem. How was the soil prepared: how big a hole was this planted into, did the backfill contain amendments, or was it "native soil"? There could be drainage issues. You can check the drainage by digging a hole near the tree, a foot or so from to the root ball, filling it with water, seeing how long it takes to drain. Explicit information is available on line, just google "drainage test" or something similar. Also, why have you watered every week? Haven't you had rain in many of those weeks? Did you check to see that the soil was dry a couple of inches below the surface? Overwatering new stock is as bad as underwatering, and overall yellow leaves could be the result; underwatering tends to cause the lower leaves to drop, so the pattern can sometimes help you assess the situation. Last, some trees DO start to change color as days get shorter - this can vary by species, variety or individual. You're smart to notice it, but you may not need, or want, or be able, to do anything about it....See Morep. violacea yellowing leaves, needs help
Comments (2)try re-potting it into a slightly larger pot and mix in a bit of acidic compost tha should help the leaves....See MoreAnother Yellow leaf lemon question w/ many Pics - Need help!
Comments (7)Water, right now. There is a slight nitrogen deficiency, but right now your plants are very water stressed. When they are just starting to need water the leaves will cup upward a bit, but when they're really thirsty they will droop downwards, still cupped. Your trees need deep watering quickly. Also, just for your future information, never fertilizer a dry plant. Luckily you put it all in a hole away from most of the roots, which isn't the best way to fertilizer in general, but in this case it may have saved your plants, because the fertilizer wasn't dissolved into the dry soil. So when you do water, add a lot to the area you added the plant food. If you're ever unsure if they need water or if they're still damp, take a wooden dowel or a take-out chopstick and push it down into the soil and pull it out again and check the dampness of the wood. It's a quick and easy way to check. Sometimes the soil can look dry on top but still be wet further down. And on the other hand, it's hard to tell if a soil is dry when it's covered with bark and plastic. Bark is good, plastic is not so much. I'd take it up and just leave the bark. Weeds won't grow too much in the shade of the trees, and if they do, just pull them out....See MoreNeed Help : Yellow spots and leaves falling of my Lemon tree
Comments (10)It is normal for citrus to drop older leaves, especially on established trees like this one. And it's always a good idea to fertilize regularly. But on the third leaf from the right, I think I see Whitefly larvae and their white stuff they leave around them. And I think the first two leaves may have a little bit of sooty mold, which would come from the Whitefly larvae droppings, a sweet sticky substance. It looks like a pretty mild case. On a tree that size they won't really damage it, it's more of a nuisance then. But if I were you I'd take the hose with a spray end and give it a good hard wash with water, especially on the under sides of the leaves. That will get rid of a large percent of them, then I'd do that every week for a while, say a month or so. That will help get rid of new ones as eggs left behind, hatch out. Overall though, johnmerr and pip are right, it's in pretty good shape, just need some food....See Morejanet_la
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