This Bible contradiction is from the Skeptic's Annotated Bible.
Plants were created before humans.
Genesis 1:11-13 View context
And God said, Let the earth bring forth grass, the herb yielding seed, [and] the fruit tree yielding fruit after his kind, whose seed [is] in itself, upon the earth: and it was so.
And the earth brought forth grass, [and] herb yielding seed after his kind, and the tree yielding fruit, whose seed [was] in itself, after his kind: and God saw that [it was] good.
And the evening and the morning were the third day.
Plants were created after humans.
Genesis 2:4-9 View context
These [are] the generations of the heavens and of the earth when they were created, in the day that the LORD God made the earth and the heavens,
And every plant of the field before it was in the earth, and every herb of the field before it grew: for the LORD God had not caused it to rain upon the earth, and [there was] not a man to till the ground.
But there went up a mist from the earth, and watered the whole face of the ground.
And the LORD God formed man [of] the dust of the ground, and breathed into his nostrils the breath of life; and man became a living soul.
And the LORD God planted a garden eastward in Eden; and there he put the man whom he had formed.
And out of the ground made the LORD God to grow every tree that is pleasant to the sight, and good for food; the tree of life also in the midst of the garden, and the tree of knowledge of good and evil.