Seeds per gram: 25
Average germination rate: 80%
Package sizes
- 20 seeds — 16 plants — covers about 144–256 sq. ft.
- 100 seeds — 80 plants — covers about 720–1,280 sq. ft.
Plant growth and coverage
- Statuesque, vase-shaped, upright clumping habit with prickly gray‑green arching leaves
- Height: 120–150 cm (4–5 ft)
- Spread: 90–120 cm (3–4 ft)
- Spacing: 90–120 cm (36–48 in) between plants; allow ample room for airflow
Choosing a packet size
- The 20-seed packet is ideal for home gardeners trialing cardoon or creating a bold focal planting in small to medium beds. It’s enough for a striking border drift or a few clumps in an edible landscape.
- The 100-seed packet suits large gardens, market growers, or landscapers planning mass plantings for architectural impact and steady harvests of leafstalks. Great for establishing long rows or multiple beds.