Answer:Peonies are funny birds -- exasperatingly tempermental if given the wrong conditions or planted just a teeny bit improperly but extraordinarily vigorous, floriferous, durable, and long-lived in the right situation. Insufficient blooms or buds not opening can be caused by several factors: 1) Bud blast, a physiological disease caused by dry conditions during formation, a lack of potassium in the soil, root-knot nematodes, or plants being set in the ground a little too deeply ( eyes set no more than 1-2 inches below the surface). 2) Insufficiently cold winter. Peony lovers who live in the south or west almost always suffer this fate. 3) Or simply too much shade (less than 6 hours per day) or not enough water. Fertilizing every two weeks is much too much, by the way. Potted plants always have a hard time dealing with August. The pot gets too hot, the soil too dry, and the plants too large. Try larger pots smaller plant varieties, plants that like shade (where you can grow them out of the sun), or a richer, more moisture-retentive soil mix.
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