GrowCNanswered grow question 3 years ago You need to go by how much fertilizer the plants need. Then you can decide how to spread that out over time. I feed my plants a low dose every day instead of hitting them with a higher amount once or twice a week. I provide the same nutrition but I break the amount into very small daily feedings so the plants get more consistent nutrition. If I were to feed every 4th day I would give them 4x as much so they get the same nutrients for the same time period.