Anyone got some aspirin ? I feel dizzy after all this headbangin '<| sep |> You can fertilize once per growth stage or per soil change . Harvesting changes the soil , that ' s why you can fertilize right after harvesting . Plowing or cultivating is a change of soil , so you can fertilize after plowingcultivating . Sowing is not a change of soil , so you can ' t fertilize before and after sowing and have 2 fertilization stages . When I say fertilize , you can use any method of fertilization you want . Solid , liquid , manure , slurry , digestate and weeder . The weeder cannot be used after stage 2 of growing , but can be used anytime before that . Even right after harvesting . that makes no sense , but you can in the game . So Harvest change fertilize 1 plowcultivate change fertilize 2 seed no change growth 1 change fertilize 3 growth is a change but you don ' t need it anymore growth same harvest . Rinse and repeat . If you want to go green , and not pay for fertilizer , you can do it like this Harvest manure or slurry plowcultivate seed oil radish cultivate seed crop wait growth weeder wait growth wait growth harvest . This way you only pay for seed , fuel and time .