Kalura Cos

Lettuce

60d to harvest

Crisp as fresh-cut glass, Kalura Cos forms tall, elegant heads with a tender, sweet snap and a clean, lightly buttery flavor. The leaves are deep green and beautifully elongated, with a sturdy midrib that holds its shape for satisfying bite and effortless serving. Ideal for gardeners who want a reliable Romaine—excellent for fresh salads and also for grilling, braising, and vibrant sauces where its texture stays pleasantly crisp.

Crop Dates

Milestone	Date
Start Indoors	Apr 17th
Last Frost	May 15th
Transplant / Sow Outdoors	May 8th
Harvest Begins	Jul 7th
Harvest Ends	Sep 24th

Crop Details

Trait	Value
Days to Maturity	60
Sun Requirements	Full Sun
Growth Habit	Rosette
Support Needed	None
Planting Depth	Surface
Germination Temp (°F)	70
Min Soil Temp (°F)	40
Min Night Temp (°F)	32
Harden Off (days)	6

Recommended Companions

Frequently Asked Questions

What pest or disease most often affects Lactuca sativa (kalura cos), and how do I manage it?

Look for aphids and slugs on young leaves; aphids cluster on tender growth and slugs chew holes, especially in humid weather. Spray an insecticidal soap for aphids and hand-remove slugs at dusk, then reduce hiding spots by keeping the bed weed-free and lightly mulched but not soggy. Also watch for downy mildew/botrytis (gray mold): avoid wetting the leaves, water at the soil line, and space plants to improve airflow.

How can I tell when Lactuca sativa (kalura cos) is ready to harvest?

Harvest at around 60 days when the plant forms a firm, upright cos head with crisp, well-developed outer leaves and the core feels solid when gently pressed. If it bolts (stems elongate and leaves become bitter), harvest immediately before quality drops. For best flavor, cut early in the morning and cool promptly.