Acid Mix, 4-3-6 5lb Box

Volume *
Delivery Option *
Current stock: 0


Got plants that thrive in low pH?

Acid Mix 4-3-6 is a fertilizer blended for plants that thrive in a low pH soil like blueberries and raspberries, rhododendrons, azaleas, hydrangeas, evergreen trees and shrubs. 

Spring application encourages lush flowers and fruit; fall application promotes root growth and boost resistance to extreme winter temperatures.

Ingredients: Cottonseed Meal, Fish Bone Meal, Langbeinite, Rock Phosphate and Kelp Meal; also contains non-plant food ingredient of 2.5% Humic Acids derived from Leonardite.

Interested in reading more about organic soil amendments? We have additional information located on our Organic Soil Amendments page.

Conversions:   2.5 cups = 1 lb;   1/2 cup = 3.2 oz;   1 Tbsp = 0.4 oz

Suggested application rates:


¤ New: prepare transplant hole by mixing 1/2 cup with the back fill soil, using the amended soil to fill in around the new plant and water well.

¤ Established: apply 1 cup per plant in early spring, mixing into soil surface and watering well.

¤ Repeat application when blooms appear and again in fall at half the recommended amount.

Vegetable Gardens and Flower Beds

¤ New: apply 3-6 lbs per 100 square feet, thoroughly mixing into the top 3" of soil. 

¤ Transplants: add 1-2 Tbsp per hole, mixing into the soil and watering well.

¤ Established: side dress 2-4 oz, depending on plant size and desired growth rate, once each month during the growing season.

Containers and Houseplants

¤ New: add 2-4 Tbsp per gallon of soil, mixing thoroughly (or add 6-10 lbs per cubic yard).

¤ Established: lightly mix 1-2 Tbsp per gallon into soil surface once each month during the growing season.

Trees and Shrubs

¤ New: prepare transplant hole, mixing 1-2 cups with the back fill soil, using the amended soil to fill in around the new tree and water well.

¤ Established: spread 1 lb per 1" of trunk diameter around the base outwards to the drip line, mixing into soil surface and water well.



Reviews (0)

Be the first to review this product.
Additional Info

Additional Info

4-3-6. Total Nitrogen (N) 4.0%: 0.6% Water Soluble Nitrogen, 3.4% Water Insoluble Nitrogen. Available Phosphate (P2O5) 3.0%. Soluble Potash (K2O) 6.0%. Calcium (Ca) 3.0%. Magnesium (Mg) 2.0%. Sulfur (S) 2.0%. Non-Plant Food Ingredients: 2.5% Humic Acids derived from Leonardite.
25lb and 50lb Bags available as Shop Pick Up Only. Conversions: 2.5 cups = 1 lb; 1/2 cup = 3.2 oz; 1 Tbsp = 0.4 oz