How long does it take to lower soil pH?

It is a slow-release sulfur product, so expect weeks to a season for a measurable drop. Reapply per the label and retest soil before adding more.

Will it turn my hydrangeas blue?

Only if your soil is acidic enough. It lowers pH toward the acid range mophead and lacecap hydrangeas need for blue flowers; pink varieties in alkaline soil may stay pink.

Is it safe around pets and children?

Espoma markets it as safe for kids and pets and registered for organic gardening. Keep the granules out of reach and water them in after spreading.

Can I use it on vegetables?

It is intended for acid-loving ornamentals and berries such as blueberries, strawberries, azaleas and camellias. Follow the label rates for edible crops.

Rates depend on current soil pH and plant type; the bag lists amounts per plant and per area. Test your soil first so you do not overshoot the target pH.

Does it replace fertilizer?

No. It adjusts pH; it is not a complete fertilizer. Pair it with a fertilizer suited to acid-loving plants.

Where is the Espoma 6 lb. Soil Acidifier cheapest?

At Blain's Farm & Fleet, for $12.99, 23% under what the other stores charge, as of our latest check.

What do buyers say about the Espoma 6 lb. Soil Acidifier?

Buyers like: Corrected yellowing plants caused by alkaline water quickly; Works well mixed into various plant soils for blueberries and strawberries; Helps acid-loving plants like blueberries and hydrangeas grow well. Common complaints: Overcharged on the order.

Where can I buy the Espoma 6 lb. Soil Acidifier?

7 stores we checked sell it, including Tractor Supply Co, Blain's Farm & Fleet, Walmart, GARDEN GOODS, Plants by Mail.

Espoma 6 lb. Soil Acidifier

Best price now

$12.99at Blain's Farm & FleetChecked 11 h ago

23% under what the other stores charge

Compared across 7 stores. Prices are checked against each store and labelled with when. Store links may earn us a commission. Price via Klarna.

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What reviewers say

Buyers report it corrected yellowing from alkaline water and helped blueberries, strawberries and hydrangeas thrive. Several say plants looked alive again after one use, and directions are easy to follow.

What people mention

PH correctionPraisedBuyers say it fixed yellowing plants caused by alkaline water.
Hydrangea colorPraisedReviewers report mophead and lacecap hydrangeas turning blue once soil is acidic.
Berry plantsPraisedGrowers say blueberries and strawberries grew well when it was mixed into their soil.
Ease of usePraisedDirections are described as easy to follow.
SpeedMixedIt is a slow-release product, so pH shifts over weeks rather than immediately.

About the Espoma 6 lb. Soil Acidifier

Espoma Soil Acidifier is a soil amendment that lowers soil pH. It is made with elemental sulfur and gypsum. Lowering the pH turns mophead and lacecap hydrangeas blue.

The formula is water-soluble and slow-release. It can be used on acid-loving plants, including azaleas, blueberries, rhododendrons, evergreens, strawberries and camellias. It is safe for kids and pets, and it is approved for organic gardening as a registered Organic Input Material.

Materials

Elemental sulfur and gypsum

Size

6 lb bag

Formula

Water-soluble, slow-release

Use on

Hydrangeas (mophead and lacecap), azaleas, blueberries, rhododendrons, evergreens, strawberries, camellias

Organic

Registered Organic Input Material, approved for organic gardening

Safety

Safe for kids and pets