This is a custom-made watering can rose diffuser for a particular watering can.  If you have one like what's in the pictures, it should fit perfectly.

This took me a few tries to get the holes, pattern, and threaded neck right, but it was worth it.

You may want to print just the face first and ensure your settings are dialed in because the required holes are really small.  Regardless, be prepared to clean them out with a stick pin.

If you need to tweak the design or settings, you can find my OnShape document at the following link:

https://cad.onshape.com/documents/0512e746b2b1e2a6f319093f/w/d96ae55c5e960d71621608a4/e/8ebfed4c4951d31ce650ef9d

The rose is fully parametric to give you a head-start on creating your own version.
 

Cheers!

&

Always Be Printing