Ruby Red

Lettuce

55d to harvest

Ruby Red brings a jewel-bright splash to the garden—crisp leaves edged in deep ruby and blushed with warm garnet over a cool green base. At maturity (about 55 days), the Batavian heads form sturdy, upright rosettes with a satisfyingly crunchy bite and tender, sweet-green flavor. Ideal for fresh salads and vibrant garnishes, Ruby Red also shines when you want color-forward greens for quick tosses and bold, leafy bowls.

Crop Dates

Milestone	Date
Start Indoors	Mar 23rd
Last Frost	Apr 20th
Transplant / Sow Outdoors	Apr 20th
Harvest Begins	Jun 14th
Harvest Ends	Oct 20th

Crop Details

Trait	Value
Days to Maturity	55
Sun Requirements	Part Sun
Growth Habit	Rosette
Support Needed	None
Planting Depth	Surface
Germination Temp (°F)	70
Min Soil Temp (°F)	40
Min Night Temp (°F)	35
Harden Off (days)	6

Frequently Asked Questions

What pests or diseases commonly affect Swiss chard (Beta vulgaris var. cicla) and how can I control them?

Swiss chard is especially prone to leaf spot and downy mildew in cool, humid weather; remove any infected leaves immediately and avoid wetting foliage when you water. Aphids and leaf miner flies are also frequent—blast aphids off with a strong stream of water and use insecticidal soap if they persist, and remove heavily mined leaves to slow the leaf miner’s spread.

How often should I water Swiss chard during the main growing phase?

During active leaf production, keep soil consistently evenly moist but not waterlogged—aim for about 1 inch (2.5 cm) of water per week, adjusted for rainfall and heat. In part-sun beds, check the top 1–2 inches of soil; water when that layer feels dry to the touch to prevent tough, bitter leaves and bolting.

How do I know when Ruby Red Swiss chard is ready to harvest?

Harvest when leaves are large enough for your use, typically around 50–60 days after sowing, with individual outer leaves about 6–10 inches long. Pick outer leaves first and leave the center growing point intact; regular harvesting keeps plants producing tender leaves and reduces the chance of bolting.