Work organic material into the soil, if necessary. Apply a 1/2-inch layer of composted manure or a 1- to 2-inch layer of compost or leaf mold. Scallions grow best in soil that is rich in organic matter.
Smooth the soil with a garden rake.
Plant the seeds 1/4 inch deep and 1/2 inch apart in blocks or rows in the spring when the soil temperature reaches 50 degrees Fahrenheit.
Moisten the soil gently so as not to disturb the seeds. Use a watering can or drip irrigation hose if feasible.
When seedlings emerge, thin them to 1 inch apart. It takes approximately four to five days for seedlings to emerge.