Igloo

Lettuce

70d to harvest

Cool, crisp crunch begins the moment you lift Igloo’s tight heads—lush, dense leaves unfurl in a pale green rosette with a clean, refreshing bite. The texture is notably sturdy and glassy, holding its snap through harvest and keeping, while the flavor stays sweet and mild. Ideal for crisphead gardeners who want dependable, uniform heads at about 70 days, Igloo shines in fresh salads and bright, chilled presentations.

Crop Dates

Milestone	Date
Start Indoors	Mar 13th
Last Frost	Apr 10th
Transplant / Sow Outdoors	Apr 10th
Harvest Begins	Jun 19th
Harvest Ends	Oct 28th

Crop Details

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

Recommended Companions

Nantes Half Long Carrot

Calypso Onion Onion

Icicle Radish

Des Vertus Savoy Cabbage

Kyoto Red Carrot

Cortland Onion

Frequently Asked Questions

How often should I water Lactuca sativa during peak growth, and what soil moisture level should I keep?

During the main growing phase, keep the top 1–2 inches of soil consistently moist but not soggy to prevent bitterness and poor head development. In typical home gardens, this often means watering about 1–2 times per week, increasing to more frequent watering during dry spells or heat. Aim for deep, slow watering so moisture reaches the root zone, and stop short of waterlogging (which can trigger rot and mildew).

How can I tell when my Lactuca sativa (Iceberg-type) is ready to harvest?

Harvest when heads feel firm and compact and the inner leaves don’t easily spring loose when you gently squeeze the head. For most iceberg-type lettuces, this is around 70 days from sowing/transplanting, but use firmness as the final trigger rather than the calendar alone. Cut the head at the base early in the day for best crispness.