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I’ve already used the nutrient deficiency charts twice to save my yellowing ficus, and the quick-reference format makes it ridiculously easy to flip to exactly what I need mid-watering.

The leaflet format is perfect for keeping on a shelf near my watering can—I flip to the nutrient deficiency chart whenever a leaf starts yellowing. It’s saved my peace lily twice already, and it makes a thoughtful gift for any friend with a sad-looking monstera.

I killed every fern I owned until I grabbed this handbook, and the leaflet on nutrient deficiencies finally explained those pale leaves. The quick reference layout means I can check a symptom in seconds while my hands are still dirty.