Plant certification ensures freedom from black rot and keeps this problem in check. If you do have black rot in a field, remove the first infected plants, if practical, and wash equipment before moving to other fields. Also, do not enter field when plants are still wet. All this will help reduce black rot spread. For more complete information, obtain a copy of Commercial Cabbage, Broccoli and Greens Production in NC , AG-487.
Some varieties mature uniformly while others are variable.
For this reason some varieties can be harvested in 1 or 2 cuttings while others will require selective cuttings 3 or more times. Harvesting aids such as conveyors reduce labor cost, improve efficiency, and reduce bruising. Putting a shelter on these aids also allows harvest in inclement weather. Excessively large heads should be packed separately or discarded. Cabbages are also sold in bags or wire bound crates that hold 50 lb.