Radish gardening is simple. They are among the fastest growing vegetables in the garden. These roots have a spicy, peppery flavor and the greens are super nutritious and delicious. Planting can be as easy as dropping seeds among slower growing vegetables like carrots or broccoli or cabbage – the radishes germinate and identify the row before the slower growing plants emerge.
The crunchy spring variety includes:
Cherry Bomb – maturity in 22 days
Crimson Giant – maturity in 30 days
Burpee White – maturity in 25 days
French Breakfast – maturity in 26 days
Early Scarlet Globe – maturity in 26 days
Organic Sparkler – maturity in 26 days
Where to Plant
Choose a site that gets at least six hours of sun a day. Spring radishes are not a finicky root vegetable. They do like full sun when the weather is cool yet will handle some shade when it’s warmer.
Because they are quick to sprout, simply sow them in any empty spaces in a bed.
Since radishes like it cool and they grow fast, they are not candidates for starting in flats and transplanting. As soon as the garden’s soil is workable in the spring, you can plant a first sowing. Plant additional rows through early May for your spring crop. Autumn planting can begin again August 1 through September 1 for harvests into October and November.
Till the soil to a depth of at least eight inches, then make furrows about six inches apart and plant the seeds at a depth of about 1/2 inch and cover loosely with soil or peat moss (anything that will not clump up and make it difficult for the seeds to sprout). Allow about one inch between seeds in the row then thin to 2 inches as they mature.
Do not cultivate too deeply or you may damage the roots. Use a hand tool or a hoe and cultivate just deeply enough to cut the weeds off below the surface.
Sunlight and Soil Requirements
As previously stated, choose a site that gets at least six hours of sun a day. For the best radishes, plant them in a friable soil when the weather is cool and provide constant moisture. Any well-drained, slightly acidic to neutral soil with pH 6 to 7 will do for radishes. An overly rich soil will encourage lush foliage at the expense of crisp, tasty roots. If the soil is too dry, radishes may bolt and become pithy and too pungent to eat. If too wet, the roots will split and rot.
Make small weekly sowings, trying different varieties to obtain a wide mix of radishes. Because most spring varieties mature in less than a month, succession plantings ensure a steady supply of radishes. When warm weather (65 degrees or higher) arrives, stop sowing as radishes will not tolerate heat and will rapidly go to seed. However, in late summer, you can start planting again for an Autumn harvest.
Although radishes are easy to grow, when radish gardening knowing to harvest is the key to perfect radishes with crisp roots and mild flavor instead of hot as fire and as pithy as corks. Garden radishes are usually ready for harvest three to five weeks after planting. You can pull them any time they reach a usable size. They will get fibrous and develop a strong taste if left in the ground too long. Remove greens and wash roots well.
The worst invader of the radish patch is the root maggot. Luckily, this pest is easily avoided with a proper crop rotation. Never plant radishes in a bed that contained a cole crop in the last three years. If you incorporate some wood ashes in the soil, the maggots shouldn’t present a problem.
Flea beetles make tiny holes in the leaves, slugs and snails chew grooves in perfect roots, and a sudden deluge can cause radishes to split and start rotting.