Espoma Organic Soil Acidifier 6 lb Bag (2-Pack) — Elemental Sulfur & Gypsum for Acid-Loving Plants

Espoma Organic Soil Acidifier is a granular, elemental sulfur-based amendment designed to lower soil pH for acid-loving plants and help turn hydrangea blooms blue.

Gardeners who need to make alkaline or neutral soils more suitable for acid-preferring plants will find this product useful. Formulated with elemental sulfur and gypsum, this Espoma-approved organic input helps reduce soil pH gradually and safely when applied according to instructions. It’s produced in the USA and approved for organic gardening, making it a practical choice for home beds, containers, and landscape plantings that favor acidic conditions.

How does Espoma Soil Acidifier change soil pH?

The elemental sulfur in this blend oxidizes in the soil, creating mild acidity over time that gradually lowers pH. Gypsum in the formula helps with soil structure and calcium without raising pH, so the product adjusts acidity without stressing plants when used correctly.

• Contains elemental sulfur—the active agent that converts to acidity through microbial action.
• Includes gypsum to improve soil texture and calcium availability.
• Works over weeks to months—best for steady, controlled pH shift.

Can I use it to turn hydrangeas blue?

Yes—reducing soil pH can encourage Mophead and Lacecap hydrangeas to produce bluer flower pigments. Success depends on initial soil pH, aluminum availability, and consistent application; extremely alkaline soils may require repeated treatments or additional measures.

• Targets hydrangea color change by lowering soil pH around the root zone.
• Most effective when combined with soil testing to monitor pH progress.
• Apply according to label rates to avoid over-acidifying or stressing plants.

Which plants benefit from this acidifier?

Use it for acid-loving ornamentals and edibles such as azaleas, rhododendrons, blueberries, camellias, evergreens, strawberries, and other acid-preferring species. It’s suitable for garden beds and container plantings when you need consistent acidic conditions over the growing season.

• Recommended for azaleas, rhododendrons and camellias for improved nutrient uptake.
• Supports blueberries and strawberries that prefer lower pH soils.
• Works with evergreens and other acidophilic landscape plants.

Is this product appropriate for organic gardens?

Espoma Soil Acidifier is registered as an Organic Input Material and meets organic production standards, making it acceptable for certified organic operations when used per guidelines. It’s made by Espoma, a long-standing producer of natural organic gardening products in the USA.

• Registered for organic production—meets organic input requirements.
• Made in the USA by Espoma, established in organic organics manufacturing since 1929.
• Granular form is easy to apply to beds and containers following instructions.

Who is this for: Home gardeners, organic growers, and landscapers seeking a reliable way to lower soil pH for acid-loving plants and to influence hydrangea flower color. Ideal for people who prefer organic-approved amendments and want gradual, manageable changes to soil acidity rather than quick chemical shifts.

Ingredients

all-natural ingredients