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Tips:5¢ Advice:Free
Join Date: Aug-2001
Location: Silicon Valley
Country: USA
Posts: 9,745
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Re: Yellow leaves on several trees
One thing about iron and many other trace elements is that if the soil pH gets just a bit alkaline, the free iron gets all bound up chemically. So adding a chelating agent (iron treatment) can be a help, but sometimes it's the pH that's at fault.
One of the growers in the area started using a little industrial vinegar (his wife was in the sanitation business) mixed in when he watered, and I have never seen Cryptomeria that green outside of Japan!
Regards,
Matt
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