Answer: Yarrow is one of the easiest plants to grow in a sunny garden. It is an outstanding plant for that hot, dry, sunny spot where few other plants will thrive. It gets floppy if you try to grow it in a shaded location and if you overfeed this plant, it will flop. It needs well draining soils - if the soil holds too much water, the plant will flop. So, it sounds as though you are giving your yarrow too much TLC!
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