Verse 4: This is the account of the heavens and the earth when they were created, in the day that the Lord God made earth and heaven.
Verse 4 takes us back to creation when it says, “in the day” and adds who in that day, “the Lord God” did what, “made the heaven and earth”. A self-existent intelligent One with a word created. With a word, a finished creation. We are not talking about a blob of unorganized cells, then finding form. The word produced form.
Verse 5: Now no shrub of the field was yet in the earth, and no plant of the field had yet sprouted, for the Lord God had not sent rain upon the earth; and there was no man to cultivate the ground.
Verse 5 is probably a continuation of the latter part of verse 4. “At the time” no shrub of the field as of yet was in the field. God made all the plants on the third day. But man was not there to gather the seeds, organize the seeds, cultivate a field, plant the seeds, and care for them. This verse tells us that there was no rain that fell upon the earth.
Verse 6: But a mist used to rise from the earth and water the whole surface of the ground.
Verse 6 tells us how God watered the plants. The plants were watered by evaporation which caused condensation. This happened because of the change in temperature from day to night. It did not rain until the flood (Genesis 7).