Blueberries, coffee, gardenias, and other ericaceous plants cannot be planted in just any substrate: beyond acidity, they need a coarse, highly aerated structure, because their roots suffocate as soon as the medium becomes waterlogged. This acidophilic substrate—also called substrate for ericaceous plants or natural acid peat—solves exactly that: it is Baltic sphagnum peat in a coarse 6-20 mm fraction, a growing medium in which these plants root and produce directly. It arrives with its native acid pH uncorrected, ready to receive each grower's fertilization program.

Key benefits

Coarse structure that aerates the root: the 6-20 mm fraction, with no fines, creates the macropores that blueberry, rhododendron, or coffee roots need to breathe and not rot—this is what distinguishes this substrate from a general-use peat.
Natural acid pH below 4.5: maintains the native acidity of sphagnum without limestone, the condition that ericaceous plants demand to assimilate iron and manganese.
Growing medium ready to plant: used directly as the substrate for the acidophilic crop; the grower simply incorporates their own fertilization—a common reference is 100-150 g of NPK per 100 L—and adjusts irrigation.
Premium raw material: sphagnum peat moss with organic matter above 95%, free of weed seeds, pathogens, and impurities.
Very low electrical conductivity: EC below 0.3 mS/cm ensures that the grower's fertilization reaches the crop cleanly, with no residual salts to interfere.

Typical applications and uses

Planting and cultivation of blueberries in raised beds, rows, or large pots.
Growing substrate for nursery ericaceous plants: azaleas, rhododendrons, gardenias, heathers, camellias.
Production of specialty coffee, where pH control in the root zone defines the cup profile.
Pots and containers for anthuriums, blue hydrangeas, sensitive hibiscus, and terrestrial orchids.
Renewal of the acidic substrate in established crops that have gradually lost acidity.

Do you need a raw material to compose your own blends or to amend soil in general? For that use, blond peat—with a medium fraction and more versatile—is the right product.

Quality and durability

Home acidification with elemental sulfur, vinegar, or aluminum sulfate works on small plots but disqualifies the professional grower: pH oscillates unpredictably between batches, salinity rises, and micronutrients become immobilized. Baltic sphagnum peat moss with a controlled H3-H6 humification grade, organic matter above 95%, and native pH below 4.5 delivers a stable, predictable acidic medium, verified in the laboratory before pressing. That traceability is what sets a commercial-grade acidophilic substrate apart from any improvised solution.

Also known as: Technical: natural acid peat, sphagnum peat moss, ericaceous substrate, acid peat substrate, peat for acidification. In DR and Caribbean: turba para arándanos, tierra ácida, sustrato para café, turba para gardenias. In other countries: acid peat moss (USA), sphagnum peat moss (USA/UK), ericaceous compost (UK), terriccio acido (IT), sustrato para acidófilas (ES/LATAM).

Raw material	Natural acidic sphagnum peat
Particle size	Coarse [6 - 20 mm (0.24 - 0.79 in)]
pH	< 4.5 (natural, no added lime)
Fertilization	Unfertilized — the grower controls the recipe
Usage recommendation	Add 100 - 150 g of NPK per 100 L when mixing
Recommended use	Blueberries, coffee, gardenias, ericaceous plants, alkaline soil acidification
Country of origin	Lithuania

GARDESE® Acidophilic substrate

Coarse [6 - 20 mm (0.24 - 0.79 in)] / 250 L (66 gal) bale

Features

GARDESE^® Acidophilic substrate