Leek Oslo 50 is a premium organic hybrid variety engineered for extended harvest seasons, thriving well into late fall and winter months when most leek varieties have finished production. This robust cultivar features distinctive broad, dark blue-green foliage paired with thick, stocky shanks that develop without bulbing, streamlining preparation and minimizing waste during cleaning and processing. The substantial shank development delivers impressive yields of usable white sections ideal for soups, stocks, and braised preparations. The architectural structure of Oslo 50 leeks—with their characteristic stocky form and minimal bulbing—makes them exceptionally practical for both home and commercial kitchen applications. The broad leaves indicate vigorous photosynthetic capacity, supporting rapid nutrient accumulation and flavor development throughout the growing season. This hybrid vigor translates to consistent performance across varying soil conditions and climatic zones. Cold hardiness represents a defining strength of this variety. Oslo 50 tolerates medium-heavy frosts between 32°F and 20°F without compromising appearance or quality, and can be successfully overwintered in temperate climates where soil doesn't freeze solid. This exceptional frost tolerance allows gardeners to harvest fresh leeks during winter months when fresh vegetables are scarce, extending the productive season by several months. Expect mature, harvestable leeks in approximately 90 days from transplanting. The high yield potential combined with excellent storage capacity makes Oslo 50 ideal for preserving abundance through winter months. Each packet contains 50 organically grown, non-GMO hybrid seeds with an 80% or better germination rate. David's Garden Seeds® packages these premium seeds in sustainable, environmentally responsible materials that reflect our commitment to ecological stewardship.