Heirloom 1906. According to F.B. Mills 1936 catalog: The Mammoth Red rock Cabbage is The largest of the Red Cabbages and the most sure heading, also the best for pickling. Those good storing cabbages produce 5-8 pound flattened round heads. The color of the leaves is a reddish purple on the outside and right to the core.

100 seeds

PLANTING

Brassica oleracea

Germination:7-12 days

Germination Temperature:Optimum soil temperatures 65-85F.

Seed Sowing Depth:1/4 deep

Starting Indoors:4-6 weeks before last frostor 4-6.Sow 2-3 seeds per cell/pot. Fertilize the seedlings every 7-10 days with a liquid or water soluble fertilizer, diluted to of suggested measurement. Transplant a week or two before last frost.Sowin late spring totransplantout for fall crops.

SowingOutdoors:In spring when soil temperature reaches at least 60F. Sow 2-3 seeds every 15-18 apart for small headed varieties, 24-36 for large headed varieties. Thin to the strongest seedling per space. Sowin early summer for fall crops. Germination is slower at lower soil temperatures.

How much does a packet plant:15-20foot single row

Harvest:If the heads feel solid by pushing on them lightly they are ready to harvest. Harvest as soon as possible for early varieties to prevent splitting. Later maturing storage varieties will hold longer.

Tips: A heavy feeder. The Mammoth Red Rock Cabbage needs togrow in fertile soil,rich in organic matter. Amend with compost if soil is not fertile.Provide adequate, even moisture for theoptimum growth.Mulching helps retain moisture.