- 1). Broadcast turnip seeds in rows. Plant three to 30 seeds in each row and space the rows 12 to 24 inches apart from each other. Cover the seeds with 1/2 inch of dirt. Water the area until the soil is moist.
- 2). Dig up turnip seedlings when they grow to 4 inches in height. Space the seedlings 4 to 6 inches apart from each other. Create small trenches in between rows that are 2 to 3 inches in depth.
- 3). Spread a 2- to 3-inch layer of mulch around the rows of turnips to help keep the soil moist and reduce your weed population. Hand pull any weeds that pop up in the turnip bed.
- 4). Fertilize your turnip plants when they are one-third of the way grown with 3 1/3 tsp. of ammonium nitrate per 100 feet of row space. Apply the fertilizer on the sides of the plants and water the nutrients into the soil.
- 5). Dig up a turnip to see if they are ready to harvest by pressing a garden fork underneath the turnip and lifting it through the soil. Harvest your turnips when they are 2 to 3 inches in diameter.
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