Gen 2:4-6 NKJV – This [is] the history of the heavens and the earth when they were created, in the day that the LORD God made the earth and the heavens, before any plant of the field was in the earth and before any herb of the field had grown.
For the LORD God had not caused it to rain on the earth, and [there was] no man to till the ground; but a mist went up from the earth and watered the whole face of the ground.
The chapter from this point to verse 15 is like a retelling with more details in some cases, and less in others. Simply at face value this is describing a state of existence of the creation with some interesting points that might bring clarity to the previous chapter.
The main description here is that the waters on the earth did not come from precipitation. Water came from under the earth, connecting back to the idea of the separation of the waters, above and below. Water was under the surface of the earth, and came up from under. Rain is something God would cause, not incidental. This is the initial method of hydration of the earth, as well as how things grow.
There is an implication here of the role of man. Mankind was the key part of the creation that coordinates plants, herbs growing things etc…