Prepare the planting site 30 days before the last frost date. Remove the weeds and loosen the soil with a shovel.
Insert the seeds into the soil 1/2 inch deep, 1 inch apart. Space rows 12 to 18 inches apart. Water until the soil settles. When the seedlings sprout, thin them so there is just one plant every 3 inches.
Place a piece of cardboard over the soil until the seedlings sprout. This will protect the soil from crusting during rains.
Continue watering frequently enough to keep the soil moist. Stress due to improper watering is the leading cause of bitterness in beets. Remove the weeds by hand-pulling them as they appear.
Pull up the beets after 60 days, when they are between 1 1/2 inches and 3 inches in diameter. If you wait longer, they will not be sweet and tender.