Squash is a warm-season crop. Sow directly in the garden in late spring or early summer when night temps stay above 10C. Before planting, amend soil with compost and fertilizer. Sow in groups of 2-3 seeds every 2 feet. Thin to 1 strong seedling per group. For best flavor pick when 6-8″ long. Harvest often to keep plants producing through the season.