Before the Flood a midst rose from the ground and watered the plants as in Genesis 2:
5 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. 6 But there went up a mist from the earth, and watered the whole face of the ground. 7 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. 8 and the Lord God planted a garden eastward in Eden; and there he put the man whom he had formed. 9 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. 10 And a river went out of Eden to water the garden; and from thence it was parted, and became into four heads.
(pix SW US by JGL)