I have just germinated 4 cucumber seeds (Suttons Byblos) in individual pots on a heated seed propagator. As soon as the seedlings appeared I took the plants off the heat and put them on the window cill. in a bedroom.
The stems are now between 4 and 5 inches long (i.e. before the seedling leaves) and will soon need support I feel. Why does this happen as, when one sees small cucumber plants in garden centres over the next few weeks, their stems below the leaves are minimal?
I presume when I plant them into grow bags I can bury the plants up to the first seedling leaves.