4. The rootstock is perennial, frost hardy, partly woody and has strong roots, which serve as nutrient reserves. Local varieties in the Tettnang growing region can reach ages of 40 years and older.
5. Hops require a framework up which to climb. In nature, they are primarily found at the edges of woodlands and water meadows where they climb up trees and bushes. In cultivation, black annealed wire (1.1 to 1.3 mm diameter) is usually used in Germany; in other countries, coir and paper string is also used.
6. On warm nights and under good growing conditions, hops can grow up to 30 cm in 24 hours and 8 m in approx. 2 months. For this reason it is also sometimes called the “world climbing champion”. Only giant bamboo grows faster.