Pro-Gro 5-3-4 is North Country Organics’ premium general-purpose fertilizer that excels in every application. Pro-Gro 5-3-4 is a high nutrient blend of natural ingredients that plants and trees respond to with rapid and sustained growth, making it the most popular blend of nurserymen, landscapers, fruit and vegetable growers, and farmers.
Its a blend of: Natural Sulfate of Potash, Phosphate Rock, Vegetable Protein Meals, Animal Protein Meals, and Natural Nitrate of Soda.
We have used it with great results for many years on both our nursery beds and display garden. We find a general application rate of 1-2 cups per established peony to be sufficient. Younger plants need less. See our page on spring fertilization here.