Limestone - Powder (-100 mesh)
type: Product
description: Limestone (Fine Powder) is a finely ground calcitic limestone that reacts quickly in the soil to raise pH and supply plant-available calcium. Ground to pass 100 mesh, it carries far more surface area than coarse or granular grades, so it breaks down and neutralizes soil acidity within the current growing season instead of over several years. This grade is built for growers who need a response now: correcting acidic potting mixes and living soils, setting pH before a planting, or topping up calcium in containers and raised beds. It is the same high-purity Canadian limestone as our coarse grade, ground fine for speed and even blending. Calcium plays a critical role in plant development, supporting strong cell walls, healthy root growth, and overall plant resilience. Benefits Fast-acting: the fine grind reacts within the current growing season Adds calcium for strong, healthy plant growth Raises and stabilizes soil pH quickly Improves the availability of phosphorus Low in magnesium compared to dolomitic lime, ideal where magnesium is already adequate Blends evenly into potting soils, living soils, and container media Supports beneficial soil microbial activity Fine Powder vs. Coarse Limestone Particle size controls how fast limestone works. This fine powder grade has a very high surface area, so it reacts quickly and is best suited to fast pH correction, blending into soil mixes, and container growing. Our coarse grade breaks down slowly and is better for long-term, slow-release conditioning in the field. Choose fine for speed and uniform blending. Choose coarse for long-term soil maintenance. Best Uses Potting Mixes & Living Soils Fine limestone blends evenly through peat, coir, and compost-based mixes. It corrects the natural acidity of peat and coir and sets a stable pH before planting, which makes it a standard component in living soil builds. Containers & Raised Beds In smaller soil volumes, even distribution matters. The fine grind spreads uniformly through the m…
brand: Optimize Organics Inc
additional property: Size
  type: PropertyValue
  value: 1KG, 2KG, 10KG, 20KG, 22.7KG PAIL
offers: AggregateOffer
  low price: 11.00
  high price: 89.00
  price currency: CAD
  offer count: 5
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    price currency: CAD
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    price: 14.00
    price currency: CAD
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    price: 39.00
    price currency: CAD
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  offers: Offer
    price: 59.00
    price currency: CAD
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  offers: Offer
    price: 89.00
    price currency: CAD
    availability: https://schema.org/InStock
    item condition: https://schema.org/NewCondition
    shipping details: OfferShippingDetails

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