I have a few cabbage plants that are about 5 inches tall from the dirt to the top of the leaves. How long would it generally take for them to grow to their max size?
What Is the Growing Time for Cabbage?
I've only tried it once, since I have to grow in containers, but it was ready in late September. (I'm in zone 6b.) You're in for a treat. Those suckers get massive as they grow. I couldn't believe the size of the outside leave. Enjoy the process. Time will take care of itself.