Radish National 3 (half red/white) seeds, in the Radish seeds for sale category of Seeds4Garden, comes in a 700 size that you can plant in March to get it in April.
Radish seeds for sale
Half red, off-white round radishes for garden cultivation only. Fairly resistant to sponginess. Sow thinly in rows and thin out later if necessary. Grows quickly. Do not fertilise much, otherwise the risk of sponginess increases. Water sufficiently to avoid excessive sharpness. Contains various minerals such as potassium and phosphates. A tasty vegetable that is easy to grow. Fun, tasty, and educational for children!
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Radish National 3 (half red/white) Features
Seeds pack size: 700
Flowering Month: April
Planting Month: March