New! Versatile, tall Bulgarian-style leek. 70 days. Variety can be harvested early for use as a bunching leek, or left to mature for a thicker shank. Definitely a summer type leek, Alto thrives in a wide range of summer conditions but should be harvested before really cold weather arrives as it isn’t a winter-hardy type. 10,000 seeds/oz. Pkt(~250 seeds) plants 25′.