Integro Organic cabbage seeds are?CERTIFIED ORGANIC. The shape of the heads is upright, with a high dome, and the core is short. The thick, tightly packed interior leaves have a vivid, attractive contrast and sweet cabbage flavour. Integro Organic cabbage seeds produced heads that held well in our field trials, and were very uniform. This is a superior cabbage for summer or fall harvests that works well for miniature heads if grown at 20cm (8″) spacing. It’s the earliest maturing red hybrid cabbage that we’re aware of, with full size heads weighing 1.3-1.8kg (3-4 lbs). Although the tight, interior leaves are thick, they are sweet and crisp, and never fibrous.