I am sorry for this delayed reply to your gardening question. The spring rush has brought a deluge of questions and we are working hard to catch up!
If it is not due to dry condition the most likely causes are soggy wet soil (poorly drained) or excessive fertilizer salts (not very likely). The rains you all have had this spring combined with an area that doesn't drain well can cause root loss and top burn symptoms.
Thanks for the question. Best wishes for a wonderful gardening season. Please stop in again soon!
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