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Hi-Yield Iron Sulfate is a granular soil supplement for correcting chlorosis, the yellowing of leaves caused by iron deficiency. It also acidifies soil, which suits acid-loving plants like azaleas, rhododendrons, blueberries and hydrangeas. One 4 lb bag covers up to 1,000 square feet, so it is a straightforward single-ingredient fix rather than a blended fertilizer. Rivals in this category are usually chelated iron products, which stay available in neutral to alkaline soil; plain iron sulfate is the cheaper, faster-acting choice but needs acidic conditions to work well.
In stockSold by Life and HomeReturns: Sold by a Walmart Marketplace seller; returns go to the seller under the seller's returns policy.
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Lowest price we've seen: $26.85 on Nov 11 at Amazon. Tracked across 1 store since Nov 11.
Owners rate it highly, with 4.6 out of 5 from 40 ratings. Most use it to green up acid-loving plants and lawns showing iron chlorosis, and report visible improvement within a few weeks. Complaints center on staining and on weak results in alkaline soil.
Hi-Yield Iron Sulfate is a granular plant supplement. It is used to prevent and correct chlorosis, which is the yellowing of plant leaves caused by an iron deficiency.
It also helps create an acid soil condition and gives plant leaves a rich green color. One 4 lb. bag treats up to 1,000 square feet.
