Trees, flowers and aloes that give flower pots

Flower pots can now be found by shaking trees, aloes  and flowers.
One should pop up for every 20 that you shake.
and it appears to be one per zoo that you visit.
Shaking greenhouses will not bring up flowers
nor will using Shakey.
You need to claim flower pots from your wall,

You can then send a flower pot back to that friend.
If you have like and comments switched off on your page
you will not be able to receive any of these.
and the person who finds it will be told they can not send it.

If you click on a flower pot that is sent to some one else you will get a sculpture.