Spinach: Gangbusters: Organic by Renee's Garden
Longstanding Spinach: Gangbusters
START SEEDS OUTDOORS
In early spring when danger of hard frost is over, sow seeds in well-worked fertile soil in full sun. Sow seeds 1 inch apart and 1/2 inch deep in rows 10 inches apart, or broadcast thinly for bed planting. Be sure to firm soil well over seeds to ensure good germination. If first sowing germinates unevenly, plant more seeds as they will catch up fast.
Spinach is most productive grown in cool spring conditions and sown again in late summer for a fall crop. After seedlings reach 2 to 3 inches tall, thin out every other plant (and enjoy in early salads) and keep thinning in this fashion until plants are spaced 5 or 6 inches apart. Keep the shallow-rooted plants well weeded and watered. Spinach is a heavy feeder so fertilize several times with fish emulsion solution for best harvests.