Ruby Perfection

Cabbage

85d to harvest

Sink your fork into Ruby Perfection’s jewel-toned heads—deep ruby-red to wine-purple with a crisp, tightly layered texture that holds its bite. At maturity (about 85 days), the foliage forms a dense, rounded cabbage with a cool, clean flavor profile that shines in bold, slow-cooked preparations and bright, tangy preserves. Grow this standout for striking color in the garden and a satisfying, crunchy presence in every red-cabbage favorite.

Crop Dates

Growing note: In frost-free Zone 10b, grow this cool-season crop during the cooler dry season (October–February).

Milestone	Date
Start Indoors	—
Climate	Frost-Free Climate
Transplant / Sow Outdoors	Oct 1st
Harvest Begins	Dec 25th
Harvest Ends	Feb 28th

Crop Details

Trait	Value
Days to Maturity	85
Sun Requirements	Full Sun
Growth Habit	Rosette
Support Needed	None
Planting Depth	Normal
Germination Temp (°F)	45
Min Soil Temp (°F)	40
Min Night Temp (°F)	32
Harden Off (days)	6

Frequently Asked Questions

How do I prevent and treat cabbage (Brassica oleracea var. capitata) problems with clubroot?

Clubroot (caused by soil fungus) shows up as wilting and yellowing plus swollen, distorted roots. Remove and discard the worst plants, and avoid replanting brassicas in the same bed for several years. Improve soil to be less consistently wet, lime to keep pH around neutral to reduce spread, and consider using fresh, amended planting mix if beds are repeatedly affected.

How often should I water cabbage during the main head-forming phase to avoid splitting or stunted heads?

During head formation, keep the soil evenly moist but not waterlogged—typically about 1 to 1.5 inches of water per week, adjusted for rain and heat. Aim for deep watering that moistens the root zone, and avoid letting beds swing from dry to soggy because that can trigger head splitting in Brassica oleracea var. capitata. Mulch around plants to reduce moisture fluctuations, especially once heads start to form.

How can I tell when Ruby Perfection cabbage is ready to harvest at about 85 days?

Harvest when heads feel firm and reach a good, dense size for your spacing, usually about 85 days after planting. If you can gently squeeze the head and it feels tight with minimal give, it’s ready; if it feels loose, wait a bit longer. Cut at the base with a sharp knife and leave the outer leaves to protect the head during cool storage.