Longest root
- Who
- Secale cereale
- What
- 622.8 kilometre(s)
- When
- 01 January 0001
The longest root is that of a single winter rye plant (Secale cereale), which has been shown to produce 622.8 km (386.9 miles) of roots in 0.051 m³ (1.801 ft³) of earth.
See also http://www.smallgrains.org/springwh/June03/amaz/amaz.htm