Buttercrunch Butterhead Lettuce Seed
Buttercrunch is a Butterhead Lettuce that is open pollinated seed (50 days) This has been called “the cucumber of lettuce, smooth and soothing with a green refreshing flavor.” A 1963 AAS developed by Dr. G.L. Raleigh at Cornell. Soft, buttery-textured leaves enclose a crisp, juicy, loose inner head of blanched, sweet-tasting leaves. Very heat-tolerant and slow to bolt, Buttercrunch stays mild long after others have turned bitter. Always our best-selling lettuce. Some ability to germinate in warm temps. About 300+ seed per pack. 97% germination.
Lettuce Culture: May be started indoors in March and at regular intervals thereafter, or sowed outdoors as soon as 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 continuous supply. Lettuce will not head unless thinned frequently and ruthlessly to 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.