Do you know what the No. 1 cause of poor health or death of plants (especially new plantings) is? It's not disease. Not unexpected freezes. Not mistakes made during planting. Watering, you say??? Aww, you looked at the title of the post — yes, it's insufficient or incorrect watering. These living organisms you've just planted can be delicate and demanding, and neglecting their water needs, even briefly, can undo all your hard work getting them planted.