Mammoth Red Rock is a popular variety of Cabbage, which belongs to the Mustard genus (Brassica oleracea (Capitata Group) 'Mammoth Red Rock'). Mammoth Red Rock is a heirloom variety. When ripe, fruit appear in these approximate colours: UA red and Debian red.
Red head heirloom from 1889, ready in 90 days.This variety is an Vegetable that typically grows as an Annual/Perennial, which is defined as a plant that can matures and completes its lifecycle over the course of one year or more. Mammoth Red Rock is known for growing to a height of approximately 30.0 cm (11.7 inches).
As Mammoth Red Rock Cabbage is a low maintanence plant, it is great for beginner gardeners and those that like gardens that don't need much overseeing.
This variety plant info is provided by the myfolia gardener's wiki. All details about Mammoth Red Rock have been kindly provided by our members.
By our calculations, you should look at sowing Mammoth Red Rock about 45 days before your last frost date.