Bred for harvest at baby-leaf size or as micro-greens, Rioja leaf radish has extremely tender leaves with masses of flavour. The large cotyledons (first leaf pair) are succulent and lovely. Most are rich purple-red, with some bright green in the mix. Add flavour and colour to salad mixes with this remarkable leaf radish, long popular in the UK and finally available in North America. This is a great option for container growing, and really fast to produce. Sow densely and often for a constant supply of fresh and spicy radish leaves.
Matures in 20 days.(Open-pollinated seeds)
How to Grow Radishes
Time your radish plantings a week apart for a longer harvest period. The secret to growing a great radish is to plant when the weather is cool, to not plant too close together and to harvest promptly before the roots get woody and bitter. Every part of the radish is edible. If you leave some of your radishes to go to seed you’ll find the pods before seed set are tender and juicy with a wonderfully sharp flavour that is excellent in stir-fries and soups. If you harvest the seeds before they dry they have a taste and texture reminiscent of caviar. Imagine the fresh seeds lightly sautéed with garlic and thyme on a bed of radish leaves. A gourmet delight! Follow along with this handy How to Grow Radishes from seed Guide and crunchy salad delights.
Latin Raphanus sativus
We Recommend: If you don’t already have a favourite, go for variety! The certified organic Easter Egg Mix (RD676) can’t be surpassed for showing everything a radish can be. Not only do you get a mix of colours, but you’ll come to appreciate subtle flavour differences, and differences in piquancy, or “hotness.”
Season & Zone Season: Cool season Exposure: Full sun Zone: All
Radishes can be grown all season but they’re easiest when sown March/April and again August through October. Optimal soil temperature: 18-24°C (65-75°F). Seeds should sprout in 5-7 days.
Sow seeds 5mm (¼”) deep, 25 seeds per 30cm (12″) in rows spaced 30-45cm (12-18″) apart, and thin to 6-12 plants per 30cm (12″).
Ideal pH: 6.0-6.8. Radishes are moderate to heavy feeders. Best in rich, loamy soil amended with composted manure. add 1 cup of complete organic fertilizer for every 3m (10′) of row for background fertility. Lime beds the previous fall. The real secret to growing this little vegetable is speed. Sow a short row frequently, thin them quickly, keep them watered, eat them quickly, and sow some more.
Harvest promptly when radishes are the size of large marbles. Leaves and developing seedpods are also tasty.
In optimal conditions at least 80% of seeds will germinate. Usual seed life: 4 years. Per 100′ row: 1.2M seeds, per acre: 522M seeds.
Diseases & Pests
Root maggots and flea beetles can be a problem. Expect to lose 20-30% of your crop to maggots if you don’t use a floating row cover.
Plant radishes near beans, beets, celeriac, chervil, cucumber, lettuce, mint, parsnip, peas, spinach, squash, and tomatoes. Avoid planting near agastache or potatoes. It is said that planting 3 or 4 icicle radishes around the mound where you plant squash, and allowing them to grow and bloom, will prevent most pests of squash and cucumber.