The seeds cost 135 coins to plant, and can be harvested every day for 315 coins. They also award 2 XP per plot.
Farm Trivia: Sunflower buds always turn to face the Sun, which is known as Heliotropism.
Harvesting Sunflowers has a 5% chance of yielding Perfect Bunches, which can be used as a decoration. Sunflowers live up to 14 days in a perfect bunch and cannot be sold.