60 to 80 days — 'Black Spanish Round' radishes develop into large, turnip-shaped globes that reach up to three inches in diameter with tall tops. The skin is blackish colored and its flesh is solid, crisp, and typically pungent (hot). As they are generally used for winter storage, sow in July or August, and store in moist sand after harvested.
This very old variety dates back prior to 1824 and has likely been in cultivation for hundreds of years. Each packet contains three grams, which is approximately 250 seeds.