3. Spacing
When you are planting your cabbage seeds or seedlings spacing is very important. You should sow your cabbage seeds about a half-inch deep in the ground and they should be spaced about an inch apart.
Once the plants begin to grow you are going to want to thin the plants out. You should thin the plants so that they end up about 18 inches up to two feet apart. If you are growing the plants from seeds you should transplant the seeds when they are about a month old and have four or five true leaves.
Make sure that you set the crooked or leggy stemmed plants more deeply, all the way up to their first leaves. Seedlings should be planted about a foot and a half to two feet apart in rows that are two or three feet apart. This provides your cabbage plants with enough room to fully grow.