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bonsaiTALK Adept
Join Date: Mar-2007
Location: Greater Toronto Area
Country: Canada
Posts: 213
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when the stems start to take on a purplish/reddish tinge, 2-3 weeks after sprouting, or when the seedling is on its second set of true leaves. Any one or a combination of these three should work out fine. They are so vigorous at this point in their life it is hard to fail.
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