How is hops grown on trellis and how are the cones dried after harvest?

Hops grows from rhizomes and the bines climb a tall trellis, often several metres high on poles and wire, so the structure is a real cost and the bines are trained up strings by hand each season. It is a perennial that takes a couple of years to come into full production, with the female plants producing the cones used in brewing. Cones are harvested when they feel papery and aromatic, then they must be dried quickly and gently in a kiln or air dryer to low moisture, because over heating drives off the aroma compounds and resins that brewers want, while under drying leads to spoilage. After drying, cones are often pressed or pelletised and kept cool to preserve quality. Since the value is entirely in the aroma and acids, careful low temperature drying and cool storage are critical. Confirm methods with a research station if you trial it.