Answer: In my experience this is a plant that really does best in a well drained soil and prefers full sun and hot summer weather -- especially when it is planted in northern climates such as yours. If you have heavy soil, or it is planted in a spot that is not terribly well drained, it seems to be slower to start in the spring because the soil there is naturally colder longer. Do not be tempted to overfertilize it to try to make it grow faster, this is a plant that does well in a relatively lean soil. Spring was such an odd one, this year, too. I think patience is probably the best thing to do, hard as it is.
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