On Day 1, I transplanted the seedling from the 2 inch APS-24 cell to the 4 inch APS-6 cell. By Day 4, the 1st true leaf emerged and by Day 6, the seedling was almost touching the grow light.
I had too stop using the grow light and take the seedling outside. Fortunately the weather in Los
Angeles this week was warm (70 to 75 degrees F in during the day). By Day 8, the seedling had outgrown the APS-6 and I had to transplant it into a 6-inch diameter round container.
This is the fastest I have ever had a Winter Melon seedling grow. At this rate, I will have to transplant the seedling into the ground by February 1 (about 1 month earlier than I planned).
One of the other winter melon seedlings is growing at a much more typical rate. The picture on the right shows the seedling 6 days after germination. The height is about 1/3 of the height of the fast growing seedling.