Instructions
Head over to Draynor Village to talk to Oliva. She runs the Draynor Seed Market and can provide you with the seeds you need to start increasing your farming levels. Start off with planting potatoes.
Plant your seeds in all four allotments spread around the realm of "RuneScape." The allotments are located north of Catherby, at the farm just west of Draynor Village, north of Ardougne and northwest of Port Phasmatys. You will earn experience in farming for each seed you plant.
Cycle through all four of the allotments to harvest the seeds you have planted. They should all have germinated into plants by now. If not, wait until the plants grow before harvesting. You will earn experience for each plant you harvest.
Repeat the process until you reach level 30 farming. Use the highest-level plants that you can plant and harvest. You can plant potatoes at level 1, onions at level 5, cabbage at level 7, tomatoes at level 12 and sweet corn at level 20.