Ruby Sky

Lettuce

50d to harvest

Ruby Sky unfolds in a lush, loose-leaf rosette where tender leaves blush from cool green to vivid ruby-red at the edges, like dawn light on velvet. Expect a crisp, juicy bite with a mild, refreshing flavor that stays pleasantly sweet—ideal for gardeners who love greens that look as good as they taste. Grow Ruby Sky for abundant harvests over a long season, perfect for fresh salads, bright wraps, and vibrant garnishes that lend color to every bowl.

Crop Dates

Milestone	Date
Start Indoors	Apr 17th
Last Frost	May 15th
Transplant / Sow Outdoors	May 8th
Harvest Begins	Jun 27th
Harvest Ends	Sep 1st

Crop Details

Trait	Value
Days to Maturity	50
Sun Requirements	Part Sun
Growth Habit	Rosette
Support Needed	None
Planting Depth	Surface
Germination Temp (°F)	65
Min Soil Temp (°F)	40
Min Night Temp (°F)	32
Harden Off (days)	6

Recommended Companions

Rat's Tail Radish

Summer Dance Cucumber

Kuroda Improved Carrot

Atlas Carrot

Long Black Radish

Japanese Climbing Cucumber

Frequently Asked Questions

What pest or disease most commonly affects Lactuca sativa (lettuce) and how can I manage it?

Lettuce is commonly hit by aphids and mildew, especially when plants stay damp. For aphids, spray plants with a strong jet of water and spot-treat heavily infested heads/leaves; for mildew, improve airflow by thinning to proper spacing and water at soil level instead of overhead.

How often should I water Lactuca sativa during the main growing phase, and what soil moisture level should I aim for?

During the main growth period (roughly weeks 2–6), keep the soil consistently evenly moist—about 1–1.5 inches (2.5–3.8 cm) of water per week in total, adjusted for rainfall and heat. Let the top 1 inch (2.5 cm) dry slightly between waterings, but don’t let the root zone dry out, since lettuce quickly turns bitter when it stresses.