1 Your age: POAG becomes much more common as we get older. It is uncommon below the age of 40 but this type of glaucoma affects one per cent of people aged over 40. About five per cent of people over the age of 65 have primary open angle glaucoma.  Your race: if you are of African origin you are more at risk of POAG.
Harvest. Cabbage will be ready for harvest in 80 to 180 days from seed depending on the variety or in 60 to 105 days from transplants. Cut cabbage when heads are firm and the base of the head is 4 to 10 inches across.
As the head matures, it will get larger, and become firm to feel. Cut cabbage heads when they are full and firm. Cabbage heads are actually the bud of the bloom stem, and if you left them to go to seed, the stem can be as tall as 6 feet high. Harvesting cabbage is a simple thing.Use a sharp knife to cut the leaves off below the head to help expose the stem, then cut the head away from the stem flush with the base. Once you cut the heads, pull up the plants. They won't produce anything meaningful after that.s the head matures, it will get larger, and become firm to feel. Cut cabbage heads when they are full and firm. Cabbage heads are actually the bud of the bloom stem, and if you left them to go to seed, the stem can be as tall as 6 feet high. Harvesting cabbage is a simple thing.