K Mag Organic (Trio Brand) 50 lb
K-Mag or Langbeinite helps acidify soils and adds potassium. Perfect for all acid lovers, especially rhododendrons, azaleas, and berries. Contains 22% potassium, 22% sulfur and 18% magnesium to encourage flowering. Apply 1 to 2 lbs. per 100 sq. ft.
Most Willamette Valley soils are naturally acidic and have adequate potassium and magnesium; a soil test is recommended before applying this product to a large area.