The Gemma red storage onion bulb produces onions with a dark red color and a slightly flattened shape. They have a white interior with red streaks and a strong aroma, and keep for a long time in storage.

Plant the bulbs at a depth of 3–4 cm, spacing them 10–15 cm apart within rows and 20–30 cm between rows. Water sparingly. For spring onions, harvest as...