| Recent Answers from David |
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2008-09-29 Victoria plum tree deficiences: The pH should be a little higher than 5.5. Somewhere around 6.0 is good. I would buy some agricultural limestone (calcium carbonate) and apply about one lb around the drip line of the tree. The product...
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2008-09-29 Ponderosa pine needles are turning brown: Pines will drop needles twice per year. once in spring and once in the fall. If it has been extremely dry and hot the past couple of months, it may be that the tree is getting ready to drop those needles...
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2008-09-29 variegated pittosporum (pittosporum tobira 'Variegata): There could be several reasons for this symptom. If the plants were transplanted this year, I would say they are experiencing transplanting shock and probably will drop some of the leaves. As long as...
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2008-09-28 Spider plant disease: Sounds like there is an insect involved. The symptom is called "skeletonized tissue" where the bug feeds on the epidermis of the leaf and leaves only the inner leaf tissue giving it a netted or thin papery...
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2008-09-28 black spots on leaves of autumn maple: There are insects that cause small galls on the leaves. I believe this is what is wrong with your tree. They will not kill the tree, but will make it look bad. If you want to treat the tree, I would...
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