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Chiko Burdock (Arctium lappa) — known as gobo in Japan — is a hardy biennial herb originating from Europe and Asia with a history spanning continents and millennia. Used in Ancient Chinese medicine for maintaining overall health, aiding fevers, colds, and chronic illness, and a culinary staple across Asian cuisines. A uniform variety producing long, slender, light-brown roots averaging 1–2 feet long and 1 inch thick — easier to grow than both carrots and parsnips, with faster germination and excellent weed competition. Plants grow upright 2–9 feet tall. Earthy, sweet, tender flavor similar to carrots and parsnips. Edible leaves, stalks, and roots. Overwinters in deeply-worked soil. Violet-colored flowers with bristles appear in year 2. 63+ days (leaves) / 100+ days (root).
Sow ¾ inch deep, 2–3 inches apart in rows 2 inches apart in deeply-worked, loamy, well-drained soil — deep soil preparation is essential for long, straight root development. Full sun to partial shade. Warm temperature preference (65–80°F). Germination 7–14 days. Harvest leaves at 63+ days. Roots fully mature at 100+ days — can be left in soil through winter and harvested the following spring or fall, much like parsnips. In year 2, plants develop striking violet-colored flowers with bristles before going to seed.
Watch for: Slugs, snails, and aphids.
| Botanical Name | Arctium lappa |
| Root Size | Avg. 1–2 feet long x 1 inch thick |
| Root Color | Light-brown to bark-colored, slim |
| Flavor | Earthy, sweet, tender — similar to carrots and parsnips |
| Days to Maturity | 63+ days (leaves); 100+ days (root) |
| Days to Germination | 7–14 days |
| Plant Height | 2–9 feet |
| Planting Depth | ¾ inch |
| Plant Spacing | 2–3 inches (9 plants per sq ft) |
| Row Spacing | 2 inches |
| Soil | Deeply-worked, loamy, well-drained |
| Temperature | 65–80°F (roots unharmed by freezing temps) |
| Light | Full sun to partial shade |
| Year 2 Flowers | Violet with bristles (before going to seed) |
| Pests | Slugs, snails, aphids |
| Type | Heirloom, Open-Pollinated, Non-GMO, Biennial |
| USDA Zones | 3–10 |
Packed and shipped by Box Garden Seeds LLC — heirloom seeds grown without GMOs, selected for flavor, resilience, and your garden’s success.