As the title suggests, it would be nice. Alternative to Chests.

All ItemHandlers should already be supported.

Did you actually try to use ducts and they didn't work? This sounds like a feature suggestion and not like a bug report and I'm confused.

As my title said, it is a feature suggestion. :)

Yes, I have already tried it, unfortunately without success.
Will make it available as a PR during the day.

Ah I see. It should be a bug report though, since it should not matter what kind of inventory is placed below. ;)

Regarding the issue itself: Hmm. Weird. Did you already figure out why it doesn't output into the ducts ItemHandler? Curious what this is caused by.

The problem is, that ItemDucts only connect and do there thing, if the TileEntity (Bonsai Pot) has the capability ITEM_HANDLER_CAPABILITY too.
Of course, this does not work because the bonsai pot doesn't have this capability.

EnderIO Conducts would also work with the PR.