NPK can restore these three nutrients when they become depleted, helping your plants survive and thrive. NPK contains a balanced blend of nitrogen, phosphorous, and potassium. Some varieties are ...

Shares of National Presto Industries, Inc. NPK have declined 8.2% since the company reported its earnings for the quarter ended March 30, 2025. This compares to the S&P 500 index’s 0.3% decline ...