"Chapter 6—Other Lessons from Seed-Sowing From the work of seed sowing and the growth of the plant from the seed, precious lessons may be taught in the family and the school. Let the children and youth learn to recognize in natural things the working of divine agencies, and they will be enabled to grasp by faith unseen benefits. As they come to understand the wonderful work of God in supplying the wants of His great family, and how we are to co-operate with Him, they will have more faith in God, and will realize more of His power in their own daily life. COL 80"
"For the invisible things of him from the creation of the world are clearly seen, being understood by the things that are made, even his eternal power and Godhead; so that they are without excuse:"
Both passages emphasize learning about God through the natural world. EGW directly applies this principle to seed sowing and plant growth, while Romans 1:20 states the general principle.
"God created the seed, as He created the earth, by His word. By His word He gave it power to grow and multiply. He 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 God saw that it was good.” Genesis 1:11, 12 . It is that word which still causes the seed to grow. Every seed that sends up its green blade to the sunlight declares the wonder-working power of that word uttered by Him who “spake, and it was”; who “commanded, and it stood fast.” Psalm 33:9 . COL 80.2"
"For he spake, and it was done; he commanded, and it stood fast."
Ellen White directly references Psalms 33:9 in this passage.