You must talk to each of four dwarves in RuneScape, who will each give you one Kelda seed for a price, usually a drink or a random item. Once you have all of these seeds, you must then go to the farming patch to the west of the Consortium. Plant them to get the hops, which then must be brewed by the local brewer. Once you have planted the seeds, just wait until 'Harvest Hops' appears. You do not need to tend to the hops for the 20 minutes it takes to grow. Harvesting Kelda hops yields 10 experience.