(60 days) Has become the classic summer romaine for warm regions. If the walls are tumbling down on your summer lettuce, try Jericho, bred in Israel’s hot dry climate to stand high temperatures. An imposing romaine, under fertile conditions it can grow dense hefty 2' tall heads of light green sword - shaped upright leaves. Yet it remains crisp, juicy and unusually sweet, slow to bolt. Remains attractive even in bad years and tolerates Bottom Rot.