I have been reading info from other folks and also working trial and error with my greenhouses in Zoo World and have come up with the following to maximize profits from greenhouses. You may or may not know this info, but feel free to pass it on to your Zoo World friends.
Gold greenhouses hold 155 items.
Silver greenhouses hold 50 items.
Bronze greenhouses hold 15 items.
1 - Bronze greenhouse - each item in the bronze greenhouse is worth their single value.
2 - Silver greenhouse - each item in the silver greenhouse is worth double its value.
3 - Gold greenhouse - each item in the gold greenhouse is worth triple its value.
The following items can be put into greenhouses, plus I have included the different values in each greenhouse:
Willow Tree - bronze $1000...silver $2000...gold $3000
Earth Tree - bronze $500...silver$1000...gold $1500
Easter Tree - bronze $100...silver $200...gold $300
Heart Tree, Big Tree, Big Orange Tree, Big Apple Tree and Quava Tree - bronze $25...silver $50...gold $75
All Small Trees - bronze $10...silver $20...gold $30
Bee Flowers:
Zinnia, Pansy, Peony, Daisy & Wildflower - bronze $50...silver $100...Gold $150
Poppy & Heliconia plants - bronze $25...silver $50...gold $75
I hope some of this information is helpful to you."