Down to Earth Acid Mix 4-3-6 | 5lb - For Acid Soil Loving Plants - (Case of 6)

Three-Season Fertilizer for Rhododendrons, Azaleas, and Blueberries, 5lb Case of 6

Rhododendrons, azaleas, blueberries, and hydrangeas all struggle in the same way when planted in soil that isn't acidic enough, regardless of how much of a general fertilizer gets applied. Down to Earth Acid Mix 4-3-6 is formulated for that specific group of acid-loving plants, with a feeding schedule built around spring vegetative growth, bloom time, and fall root and cold-hardiness support.

This 5lb bag, sold in a case of 6, suits gardeners with a smaller planting of acid-loving shrubs and perennials.

Key Features & Benefits

• 4-3-6 ratio for acid-loving plants — matches the nutrient needs of rhododendrons, azaleas, blueberries, and hydrangeas specifically.
• Three-season timing — supports spring vegetative growth, bloom-time feeding, and fall root development and cold resistance.
• Formulated for acid soil preference — targets plants that specifically need a lower soil pH to thrive, rather than a general garden bed.
• Organic ingredient base — draws on organic inputs suited to acid-loving ornamentals and berries.

Who Should Use This

Gardeners growing rhododendrons, azaleas, blueberries, or hydrangeas, where a standard all-purpose fertilizer doesn't address the acid soil preference of these plants, are the right fit for Acid Mix.

About Down To Earth

Down To Earth formulates specialty blends like Acid Mix for specific plant groups alongside its broader organic fertilizer lineup, a catalog built on natural ingredient sourcing since the company's 1977 start in Eugene, Oregon.

Frequently Asked Questions

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

It's built specifically for acid-loving plants including rhododendrons, azaleas, blueberries, and hydrangeas, rather than as a general garden fertilizer. These plants struggle in typical garden soil pH regardless of how much of a standard fertilizer gets applied.

When during the year should Acid Mix be applied?

Apply in spring to support vegetative growth, again at bloom time, and optionally in fall to support root development and cold resistance heading into winter. That three-season rhythm matches how acid-loving shrubs and perennials cycle through the year.

Why do these particular plants need an acid-specific fertilizer?

Rhododendrons, azaleas, blueberries, and hydrangeas are naturally adapted to more acidic soil than most garden plants, and a standard fertilizer applied to neutral or alkaline soil won't correct that underlying pH mismatch. Acid Mix is formulated around their specific soil chemistry needs rather than general nutrition alone.

Can Acid Mix be used on other ornamentals besides the plants it's named for?

It's specifically formulated around the needs of acid-loving species, so it's best reserved for rhododendrons, azaleas, blueberries, hydrangeas, and similar acid-preferring plants rather than a general ornamental bed. Mixing it into neutral-pH beds with other plant types isn't the intended use.