The Mammoth Red Rock variation of Cabbage seed packets
90 days till maturity. The Mammoth Red Rock cabbage has a beautiful reddish-purple tone to its heads, which have a subtle, delicate, and sweet flavor. It is a hardy crop and it does well when growing in climate zones one through ten. The plant produces large heads after around ninety days. This is an excellent choice for gardeners looking for a classic red cabbage to add to salads, slaws, and other dishes.