User blog comment:Trainlover123123/2018 Spook & Sinister Hunting Thread/@comment-33355880-20180901135733/@comment-31045658-20180901151003

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We're almost positive spook growth started before that since spook trees can take days to grow to full size, and this tree was well past full size.

I would begin hunting around September 15 if you're trying to get one of the ultra rare September spook trees.