Winter Density Bibb/Romaine Lettuce Seed
Another gardener popular lettuce this Winter Density Bibb/Romaine Lettuce Seed is an open pollinated favorite. (60 days) Also known as Craquerelle du Midi, a French heirloom from the 19th century. Is it a bibb or romaine? Any way you look at it, its thick tender dark green leaves make superb eating.
Starts out looking like a bibb then wrapper leaves fold tightly, forming a head like a romaine when mature. Combines the substance of romaine with the tender succulence of a bibb. No warm-temperature germination tolerance. Cold-hardy through at least part of the Maine winter.
About 300+ seeds per pack. 94% 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.