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Old 12-07-2013, 01:13 PM
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BrendonTW BrendonTW is offline
LawnSite Senior Member
Join Date: May 2009
Location: Oklahoma City
Posts: 525
Originally Posted by RigglePLC View Post
Major leaf fall is an indication of poor irrigation--transplant shock--or perhaps plants not suited to your climate.

I am not a soil expert. However I think the soil is fine--perhaps the CEC is a bit low.
However, I think that the pH is a bit too high. Perhaps this is resulting in poor solubility of the iron in the soil solution. Manganese and other metal nutrients, also. If soil moisture, drainage and temperature are might try to apply a chelated iron and micronutrients spray to some of the shrubbery. Follow the directions carefully. The new growth and some of the old growth should look better.

Alternatively, go to a major soil test lab and arrange a "tissue test". You send them the green part of the plant and they bake it to ash and analyze the mineral content in a spectrophotometer like in Abbey's lab on NCIS. Costs 5 times as much.

And finally--there is a potential for some kind of chemical herbicide in the soil itself. Plant some tomatoes in it--inside of course--and compare with a known good soil.
Thanks so much for the reply.

I didn't know much about soils and didn't know what the CEC was until I did a bit of research. It seemed to me like it was way too low, but this is the only soil analysis I've ever seen so I don't know. How can I bring the pH down, lime?

Temperature and irrigation is standard for the plant material.

Another odd thing is that there has been virtually no new growth on the boxwoods.
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