Herb runs

Plant a herb seed in every herb patch, come back when they have grown, and sell the grimy herbs. There are ten herb patches. How many herbs a patch gives follows the game's own formula for your Farming level, compost and boosts such as magic secateurs, with the patches that die of disease counted; your own average can replace it. Herbs take 80 minutes to grow. Prices assume you buy and sell instantly, so these profits are the safe floor; with offers you earn more.