Radishes are so easy to grow it is almost criminal to suggest that you read an entire page about them.
When to Plant Radish Seed
Sow radish seed in the spring as soon as you can work the ground. The seed will be up and out of the ground in about five days and don’t worry about frost or snow or cold (heavy freezing will hurt them but that’s about it) Sow a new crop every week until it starts to get too hot; they do not like hot weather.
Where to Plant
Full sun to part shade in almost any soil for spring crops but good, well-drained soils for main season and fall crops.
How to Plant
Sow the seed about .6 to .75 cm deep at one seed per centimetre of row. Thin the resulting seedlings so they are around 3 to 4 centimetres apart.
This means that the rows should be very short because (think about it) how many radishes can you really eat in salads or stir fries? 🙂
I should tell you that Mayo and I grow them for the seed pods rather than the roots. Just ignore the plants and roots – grow them as any other plant. They’ll send up flowering stems with pale white/cream flowers and then produce delicious peppery seedpods. Harvest them green and continuously.
Care & Maintenance
Harvest them regularly because they really are only in prime condition for a few days it seems. To keep them mild – not blazing hot and tough – you need to grow them quickly. Think lots of compost in the top few inches of soil (they are shallow rooted) and absolutely no moisture stress (keep them well watered). If you let them dry out or get too hot in July and August – they’ll quickly become woody and not nice to eat.
You may find when trying to grow them in the middle of the summer that the long days and high temperatures make them go to flower very quickly. This is to be expected. Just yank them out and compost them.
Because they are shallow rooted, cultivate as shallowly as you can. Use compost in the soil as this plant does not like over feeding. Overfeeding attracts root maggots (they like the extra nitrogen in the soil and root.)
Use as row markers for other plants such as carrots or tuck a few here and there between tomato plants. Use waste space in the garden to grow rather than give them their own row.
(all numbers rounded out)
1/4 inch = .6 cm
1/2 inch = 1.3 cm
1 inch = 2.5 cm
6 inch = 15 cm
12 inch = 30 cm
18 inch = 45 cm
36 inch = 91 cm
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