Here is an excerpt from Marianne Moore's "Poetry" in which Moore expresses her dislike for poorly written poems. What does Moore mean when she says "imaginary gardens with real toads in them" in this excerpt?

…same thing may be said for all of us—that we
do not admire what
we cannot understand. The bat,
holding on upside down or in quest of something to

eat, elephants pushing, a wild horse taking a roll … all these phenomena are important. One must
make a distinction
however: when dragged into prominence by half poets,
the result is not poetry,
nor till the autocrats among us can be
“literalists of
the imagination”—above
insolence and triviality and can present

for inspection, imaginary gardens with real toads in them,
shall we have
it. In the meantime, if you demand on the one hand, in defiance
of their opinion—
the raw material of poetry in
all its rawness, and
that which is on the other hand,
genuine, then you are interested in poetry.