"The pot is small."

Translation: La poto estas malgranda.

[zixster]

why does "la poto malgrandas" not work here?

[jxetkubo]

It should.

[VincentOostelbos]

Not all possibilities are encoded, so not all of them are allowed. I am constantly trying alternative word orders to see if they work (particularly SOV, thus far), which they usually don't, at which point I flag them for inclusion. You could do the same with the option you came up with :)

[Neotecha]

If a user runs into situations like this, they should Report it so it can be added.

[VincentOostelbos]

Right :) that's what I meant too, if it wasn't clear.

[Majklo_Blic]

It does now.