Down To Earth Acid Mix 4-3-6 | 15lb - 3pk of 5lb

Organic Formula Calibrated for Rhododendrons, Azaleas, and Blueberries, 15lb-3pk

Acid-loving plants such as rhododendrons, azaleas, and blueberries struggle to take up nutrients properly when soil pH runs higher than they prefer, and a standard all-purpose fertilizer isn't calibrated for that low-pH environment. Down To Earth Acid Mix 4-3-6 blends cottonseed meal, langbeinite, fish bone meal, rock phosphate, humates, and kelp meal into a formula built specifically for plants that thrive in acidic soil conditions.

Sold as three individual 5lb bags totaling 15lb, this format gives gardeners a convenient multi-bag supply for larger gardens or multi-site plantings of acid-loving shrubs and trees.

Key Features & Benefits

• 4-3-6 NPK formula — delivers balanced nitrogen, phosphorus, and potassium suited to acid-preferring plant species.
• Six-ingredient organic blend — combines cottonseed meal, langbeinite, fish bone meal, rock phosphate, humates, and kelp meal.
• Spring and fall application — spring feeding supports vegetative growth and blooms, fall feeding supports root development and cold hardiness.
• Broad coverage for acid-soil plants — suited to rhododendrons, azaleas, hydrangeas, blueberries, raspberries, and evergreens.

Who Should Use Down To Earth Acid Mix 4-3-6

This fits gardeners growing acid-loving ornamentals like rhododendrons and azaleas, fruit-bearing shrubs like blueberries and raspberries, or evergreen trees and shrubs, particularly where soil naturally runs acidic or plants show poor nutrient uptake.

About Down To Earth Acid Mix 4-3-6

Acid Mix is one of the plant-group-specific organic blends Down To Earth Distributors has formulated at its Eugene, Oregon facility since 1977, built around the particular needs of acid-preferring species.

Frequently Asked Questions

What plants is Acid Mix 4-3-6 designed for?

It's designed for acid-loving plants including rhododendrons, azaleas, hydrangeas, blueberries, raspberries, and evergreen trees and shrubs — species that prefer lower-pH soil conditions than most garden plants. Plants outside this group generally do better on a standard all-purpose formula instead.

What ingredients make up Acid Mix 4-3-6?

The blend includes cottonseed meal, langbeinite, fish bone meal, rock phosphate, humates, and kelp meal, six organic ingredients selected for nutrition in acidic soil conditions. Cottonseed meal in particular has a naturally acidifying effect that suits this plant group.

When should Acid Mix 4-3-6 be applied?

Apply in early spring to support vegetative growth and again when blooms appear. A fall application can support root development and help acid-loving plants build resistance to cold heading into winter.

Can Acid Mix be used on blueberries?

Yes, blueberries are acid-preferring plants that respond well to the 4-3-6 formula, and raspberries are also a good fit for the same reason. Both crops tend to struggle when grown in soil that hasn't been adjusted toward a lower pH.

Is Acid Mix 4-3-6 certified organic?

It's made from organic ingredients, though certification status varies by pack size in the Down To Earth lineup. Check the current product label for the specific size you're using rather than assuming certification across the whole line.