Can I ever this over Superthrive?

Shibui

Imperial Masterpiece
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Yackandandah, Australia
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9?
I also do hundreds of trees every year and cannot see any difference with or without kelp. The companies selling this have done a great job in marketing but I don't use it any more.
I have not seen any evidence of any harm, just no visible benefit so I am quite happy if others find it comforting to use.
 
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