iOS Flesh is green collection

[Airport city cheat]

I'm trying to complete the flesh is green collection, I've landed loads of falcon planes but nothing has dropped for a very long time.

I've tried dice, golden dice & spyglass & nothing will help with the drops.

What can I use/do to speed up the process?

 

[Bali Hi]

You should slow down a bit and not click on the falcon the moment they land.
Also try to land more than 2 or more falcons and clicking on them in succession.

 

[Kesh]

I think this one is pure luck. I almost got all 6 in little more then a week since update to WP arrived. (3 trees missing for full collections)

 

[Kesh]

Yesterday I finally got last 2 bonsai trees to complete 6th collection. What I noticed that drop rate significantly decreased after I reach L55. On the other hand I got last 2 in a space of few hours (landed maybe 8-10 falcons in between).