Cardinale Batavian Lettuce Seed Organic
Our Cardinale Batavian Lettuce Seed is certified organic. Batavians have good hot weather germination, and excellent heat & cold tolerance.
This alluring wine-red European Batavian disappeared from commerce for a while before Frank Morton rescued it. And a worthy rescue it was, for Cardinale is a classic both for baby leaf and full head production. Looks a little like a butterhead romaine cross, as the open rosettes fold together like romaine in the center at full maturity. Shiny red leaves on the outside, green in the center, crisp and juicy with some heft. Survived temperatures in the teens under a white bed sheet.300 seed per pack. 89% germination.
Lettuce Culture: May be started indoors in March and at regular intervals thereafter, or sowed outdoors as soon as the ground can be worked. Many varieties won't germinate in soil temperatures above 75° and most shut down above 80°. Where available, we present data here from a California germination experiment at 84°.
Hardy. All lettuces except icebergs tolerate heavy frost. They grow best in cool weather with medium moisture. Use shade cloth to keep summer lettuce tender and sweet longer.
Sow every 2 weeks for a continuous supply. Lettuce will not head unless thinned frequently and ruthlessly to a final distance of 1'. Heavy nitrogen feeders.
Minimum germination soil temperature 35°, optimal range 40-80°, optimal temperatures 70-75°. Emergence takes 3 days at 68°soil temperature.
Days to maturity are from direct seeding.