Till 3 inches of well-rotted compost, 2 inches peat moss and 1 inch of perlite into the soil to a depth of 6 inches. Rake the amended soil to a smooth finish.
Scatter the hulled buckwheat seeds evenly over the surface of the prepared soil. Use approximately 3 oz. of hulled seeds per 100 square feet of garden space. Rake the garden bed to ensure that the seeds make good contact with the amended soil.
Irrigate the hulled buckwheat seeds with up to 3/4-inch of water after planting to encourage germination; tiny seedlings with two heart-shaped leaves emerge five to seven days later. Continue to irrigate the buckwheat regularly to ensure a hearty crop; provide up to 1 inch of water each time you irrigate.
Fertilize buckwheat with a half-strength solution of a balanced, water-soluble fertilizer once a month during its active growing season to ensure optimal performance. Mix and apply the fertilizer according to the directions on the product label.
Harvest buckwheat when three-quarters of the seeds have deepened to a rich, dark brown. Cut the stalks down to just 1 to 2 inches above the ground, using sharpened and sterilized pruning shears.