Surface sow seeds on fresh seed starting mix three to four weeks before transplanting into the garden. Time your sowing so that you can get the seedlings planted early (a few weeks before your last spring frost) as leeks require a very long season.
Seedlings are transplanted into trenches and require that you continue to mulch or hill soil up around the plants as they grow. You can begin to harvest as soon as they are ready in the early fall and into the winter. However, you should complete harvesting before hard freezes occur.
Each packet contains one gram, which is approximately 150 to 200 seeds.