Cosmo Savoy

Lettuce

50d to harvest

Sink your fork into Cosmo Savoy’s crisp, cool crunch—its leaves are richly textured with a Savoyed, ruffled surface and a bright, fresh green that feels as alive as it looks. At maturity in about 50 days, this Romaine forms a tight, upright head with a tender, succulent bite and a pleasantly mild, clean flavor. Ideal for garden-fresh salads and elegant garnishes, Cosmo Savoy brings a refined, leafy presence to every plate with its sturdy structure and beautiful, crinkled leaves.

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	Nov 20th
Harvest Ends	Feb 28th

Crop Details

Trait	Value
Days to Maturity	50
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)	5

Frequently Asked Questions

What pest or disease is most likely on Lactuca sativa (Cosmo Savoy), and how can I control it?

On leafy Lactuca sativa, watch for aphids and powdery mildew, especially in warm, humid conditions. Spray affected plants with a strong jet of water to knock off aphids, then use insecticidal soap if they persist, and improve airflow by spacing heads/rows so leaves dry quickly. If powdery mildew appears, remove the most infected leaves and avoid overhead watering to slow spread.

How often should I water Cosmo Savoy during its main growing phase?

Keep the soil consistently moist during the 35–50 day growth window, aiming for evenly damp (not soggy) conditions. Water when the top 1 inch of soil feels dry; in hot part-sun spots this often means about 1–2 times per week, but increase frequency if leaves wilt in the afternoon. Because Lactuca sativa is shallow-rooted, avoid long dry spells followed by heavy watering.

How do I tell when Cosmo Savoy is ready to harvest?

Harvest when the rosette is fully sized and the outer leaves are crisp and well-colored, typically around 50 days from sowing. For leaf harvest, pick outer leaves anytime once they’re large enough to eat, but for best texture wait until plants are near full size so the heart is formed. If plants start to bolt (flower stalk), harvest promptly for best flavor.