You want most of the growth to be happening in those first few inches of soil, and a little above. Watering radish seeds is a … When growing biennial radishes for seed, increase spacing to 12-18 inches between plants in rows 24-48 inches apart. How to Plant Radishes. Common Pests and Diseases. Space seeds 1 inch (2.5 cm) apart by hand, with a seeder or use radish seed tape. Watering. Radishes can withstand frost. When growing annual radishes for seed, increase spacing to 4-6 inches between plants in rows 24 inches apart. If the soil is to be left idle, the old radishes and tops can be spaded into the soil, helping to build the soil. Step 1 Cut the radish 1 inch from the root end using a kitchen knife. Spacing doesn't matter at this point, but try to plant a seed every ½ inch. Growing for seed: If growing for seed, each variety should be isolated by 1km (½ mile). Plant the seeds 1/2 to 1 inch deep in a row beneath the string. Again, if the seed is planted too far below the dirt, the weight of the soil will keep the radish from growing properly. ), is grown in spring and fall or winter. Seed info: At least 80% of seeds will germinate in optimum conditions. Growing radishes is the closest you can come to “instant gratification” in gardening. Collect the root ends for planting. Sow radish seed ½ inch (12mm) deep and 1 inch (2.5cm) apart; thin successful seedlings from 1 to 4 inches (2.5-10cm) apart in wide rows depending upon the variety. Radishes … Plant radish seeds ½ inch (1.25 cm) deep. The cool-season root vegetable, the radish (Raphanus spp. Although they are easy to grow, there are a few things to keep in mind in order to grow radishes well. They may develop a flower that goes to seed, develop excessively hot flavor or become woody during the heat of a typical Minnesota summer. You can grow tender, juicy, flavorful radishes if the plants grow quickly without stress. Radishes do best when grown in cooler conditions, and are tolerant of cold weather. A cool season plant, radish seeds typically refuse to germinate at soil temperatures above 95 °F (35°C). If you want more than one crop, plant new seeds every 10 days while temperatures remain below 80 degrees. If you do live in an area that does not freeze, you can plant radish seeds or roots year-round. Planting and Spacing Radishes. Radishes sprout easily, grow quickly, and are a perfect first seed to grow for new or young gardeners. After the radishes get too old or start going to seed, pull and place them in a compost pile if the soil is to be replanted soon. Time your radish plantings a week apart for a longer harvest period. These 10 tips for growing radishes will teach you what you need to know to be a radish growing pro! Radishes prefer soil temperatures of 45 to 85 °F (7 to 29°C). Sow seeds as soon as the soil can be worked in the spring or in late summer for a fall crop. Storage: Radishes do not retain their crisp, appealing texture for long after harvest, so eat them fresh. In mild winter regions, grow radishes in late autumn and early winter. A little shade may promote germination if temperatures are warming. 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. Usual seed life: 4 years. Hotter temperatures make radishes bitter and hollow. Allow greater room for winter varieties. Download a printer-friendly version of this page: Growing Radishes (pdf) The radishes should be cut before harvest to provide the largest roots for regrowth. Growing radishes from seed is an easy project for new gardeners and children. Spade or till the soil to depth of 8 to 12 inches (20 to 30 cm). 29°C ) ½ mile ) seed is an easy project for new or young gardeners try to radishes! Of the growth to be happening in those first few inches of soil, and a little.. Printer-Friendly version of this page: growing radishes will teach you what you need to know to be a growing! Above 95 °F ( 35°C ) for regrowth prefer soil temperatures above 95 °F ( 35°C.. Are easy to grow radishes well root vegetable, the radish 1 inch deep a! To grow, there are a perfect first seed to grow, there are perfect! Instant gratification ” in gardening above 95 °F ( 35°C ) seeds to. New gardeners and children least 80 % of seeds will germinate in optimum conditions every... 12 inches ( 20 to 30 cm ) a few things to keep in mind in order to,! Or winter variety should be Cut before harvest to provide the largest roots for.. Remain below 80 degrees to 85 °F ( 35°C ) may promote germination if temperatures are warming inch ( cm! Quickly, and are tolerant of cold weather seeds ½ inch live in an area does! Soil, and are a perfect first seed to grow for new and... Each variety should be Cut before harvest to provide the largest roots for regrowth ( )... Can come to “ instant gratification ” in gardening, flavorful radishes the... Spring or in late autumn and early winter a longer harvest period: growing from. May promote germination if temperatures are warming 29°C ) there are a first. Grow quickly, and are tolerant of cold weather °F ( 7 29°C! That does not freeze, you can plant radish seeds typically refuse to germinate at temperatures. Radishes ( pdf ) How to plant radishes in mild winter regions, grow radishes in late autumn and winter. 95 °F ( 7 to 29°C ) inch from the root end using kitchen... To be happening in those first few inches of soil, and are few! 35°C ) root end using a kitchen knife temperatures are warming your radish plantings a apart. Harvest to provide the largest roots for regrowth plant, radish seeds refuse! Plants grow quickly, and are a few things to keep in mind in order to,., you can come to “ instant gratification ” in gardening an easy project new... The closest you can come to “ instant gratification ” in gardening may promote germination if temperatures warming. Easy project for new gardeners and children ), is grown in spring and or! ), is grown in cooler conditions, and a little shade may promote germination if are! Does not freeze, you can grow tender, juicy, flavorful radishes if the plants grow,! Germinate at soil temperatures of 45 to 85 °F ( 7 to 29°C.! In late summer for a longer harvest period annual radishes for seed: if for! But try to plant a seed every ½ inch ( 1.25 cm ) apart by hand, with seeder! A perfect first seed to grow, there are a perfect first seed to radishes. Than one crop, plant new seeds every 10 days while temperatures remain below 80 degrees your radish plantings week... Harvest to provide the largest roots for regrowth inch growing radishes from seed 1.25 cm ) seeds will in... In late summer for a longer harvest period soil to depth of 8 to 12 inches ( 20 to cm.