Botanical Name: Petroselinum crispum
Native: Widely cultivated; origin unknown
Hardiness: Biennial grown as an annual because the best flavor comes from first year leaves. Leaves become bitter when flowers appear in the second year.
Plant Dimensions: 10"–12" tall and wide
Variety Information: Mounding plants with dark green, deeply cut, curled leaves with a milder flavor than flat-leaf types.
Exposure: Full sun to part shade
When to Sow Outside: RECOMMENDED. 4 to 6 weeks before your average last frost date, or as soon as the soil can be worked; when soil temperature is 50°–85°F.
When to Start Inside: 6 to 8 weeks before your average last frost date.
Days to Emerge: 14–28 days
Seed Depth: ¼"
Seed Spacing: A group of 3 seeds every 8"
Row Spacing: 16"
Thinning: When 1" tall, thin to 1 every 8"
Harvesting: Pick as needed, removing entire stalks to the ground, but not removing more than 1/3 of the plant.