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Peace lilies are forgiving houseplants until they're not. They tolerate neglect, bounce back from underwater watering, and look elegant in corners where other plants struggle.But they have one non-negotiable requirement: regular feeding. Without it, those glossy green leaves start losing their shine, blooms become sparse, and your plant quietly declines into a sad, pale version of itself.Get the timing and amount right, and your peace lily rewards you with vibrant foliage and those signature white flower spathes appearing constantly. Here's how to feed your plant so it actually thrives.

Feed during growth season

Peace lilies grow aggressively in spring and summer when days are longer and sunlight is abundant. This is when they need regular feeding, typically starting in late February or early March. During these months, your plant actively produces new leaves and flowers, a process that demands consistent nutrients.Conversely, you should stop fertilizing entirely in late fall and winter. Your plant receives less sunlight, grows slowly, and enters a natural dormancy where it needs far less nutrition. If you use grow lights year-round, you can fertilize continuously since artificial light mimics constant growing conditions. But for most indoor gardeners, seasonally adjusting fertilizer prevents accidentally overfeeding the root system.