Since Halloween is coming up soon, I am asking when and if the Halloween plants will be dropping and breedable? I was hoping to get more of the Snappy Trees, the Audrey's, and the Jack O'Lanterns, because I am missing some of the new ones released last year.

Jack o lantern When will they start dropping?
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They're dropping.
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But when and where do riddles appear ?
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Until when they are dropping?
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It seems they stopped dropping today. That's a shame! That means I only managed to grab 4 plants total, because I got mine on the 28th and they just grew today.
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Same here
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I managed to get 8 plants. I took first 26 Oct. So sad they are gone.