I am still missing something!

Let me see if I have this correct.

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Complete Puzzles 1, 3, 7, and 8. Attain Level 3 Dendrology. Make a stew with fresh water, 3 yellow flowers, and 1 bowl of food. Place at least 20 villagers at the pot. They will take the bowl to the tree and then contemlate.

I have done this twice and it hasn't worked! What am I doing wrong??