How long does it take before the butterfly plant in virtual villagers 4 is fully recovered?

i play virtual villagers 4, and for puzzle 5 i need a fully recovered butterfly plant.

but i have waited for 20 minutes and it isn't still fully recovered.

someone help me please?How long does it take before the butterfly plant in virtual villagers 4 is fully recovered?
It takes patience and a few real-time hours. Hint: When you get the butterflies, *don't lose them* when you drag your villager to the tree - drag very, very slowly. If you lose the butterflies, you have to start over at the plant again.