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| I've got a young Cotinus coggygria (smoke-bush family) variety that is supposed to have a sort of golden/light-green leaf color. That's how it looked from the plant nursery, and that's how it looked just after transplanting. The people selling it said the light color is natural to this variety, so we bought it due to that, since we already have two of the more common dark type.
But at this point, about six weeks after transplanting, it's got many leaves that are going brownish around the main leaf veins. The brown is not similar to the deeper color of more typical smoke bush varieties (which are usually a very deep reddish-brown) - rather, this looks sickly, almost necrotic. Any idea as to what this may mean, in terms of a soil deficiency symptom? Or possibly the problems is with sun exposure or how much water it's been getting. ?? |
Follow-Up Postings:
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| Presumably you came home with an 'Ancot'. It might be burning a bit in the hot weather or it might have picked up a soil-borne pathogen like verticillium. If it goes on to blight off, with leaves and stems shriveling then the latter is implied. In the meantime, make some provision for a little shade to see if that helps. Yellow- and other pale-leaved forms of plants are often sensitive to hot sun that does not faze the typical plant (or purple-leaved forms of same) on the same site. |
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| Six weeks after transplanting means that the original; rootball is going -- or has gone -- dry. Make a 2-inch tall dike at the edge of the rootball, then fill with water once or twice daily as needed. |
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| Jean: thanks. I've got an arrangement similar to what you've described. It seems unlikely to me that the roots are drying out - my concern was that, possibly, it was getting over-watered. Or exposed to too much sunlight, since we've had bright sun during much of the mid summer. bboy: the shade of the brown around the leaf main veins is similar to the look of the tar&nicotinized fingernails one used to sometimes see on the first couple fingers of chain smokers. So far, no shrivelling of leaves or stems is present. |
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| Brown edges typically means too little water. Pale leaves, especially near the veins, often means too much water. So you have home work to do. Stick a finger or trowel into the original rootball to check. Is it dry, moist, or wet? And yes, very sunny and/or hot weather is rough on recently planted trees. You could rig temporary shade. |
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| When diking around plants the crown should have soil around it that keeps it out of the water. "Moating" would be a better term. |
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