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bonsaiTALK Master
Join Date: Mar-2005
Location: Georgia
Country: USA
Posts: 326
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Joanie may be right. But an ounce of prevention, well you know the rest. If you can't have someone specifically identify the stuff and tell you for certain it's friend or foe, I would remove it entirely, and would consider repotting. If it's some kind of critter or fungus it would be better off with removing ALL of the old soil and repotting with new mixture. If it's critters there may be eggs in the old soil, and if it's bad fungus there will be microscopic spores. Completely washing the roots of all soil before repotting is safer.
Then again, if it's fertilizer......... You will have to decide. Sometimes the pellets of Osmocote will have been mixed into the soil as well and if you dig in a little you may find some similar residue.
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Over 25 years experience - good and bad, and still learning!
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