GRODAN BOX 4″ CUBES (LARGE HOLE 36MM)

Description

GRODAN BOX 4″ CUBES (LARGE HOLE 36MM) is the bulk box of Grodan 4-inch stonewool propagation cubes with the large 36mm centre hole, providing commercial-scale propagation volume of Grodan’s industry-standard stonewool substrate at the most economical format for growers taking large numbers of cuttings or establishing seedlings regularly. We have been recommending Grodan propagation substrates to UK growers since 2017 as the professional standard in stonewool propagation media.

Why the Box Format Is the Professional Propagator’s Choice

For growers who propagate regularly and at scale — commercial operations taking hundreds of cuttings per cycle, breeding projects maintaining multiple mother plant lines, or continuous production operations that require a constant flow of rooted cuttings — buying propagation cubes in strip or individual formats quickly becomes impractical and expensive. The Grodan box format provides a consistent, properly packaged supply of 4-inch cubes that can be stored correctly between use and accessed in quantity without the per-unit cost premium of smaller pack sizes. Grodan’s manufacturing consistency ensures that every cube in the box behaves identically — the same air-to-water ratio, the same moisture distribution, the same structural integrity — which is essential for predictable, repeatable propagation results at scale. The 36mm large hole provides the aperture required for chunky, mature cuttings and pre-germinated seeds that need a generous hole to be inserted without compressing the stem or root.

Preparation, High-Volume Propagation Protocol, and System Integration

Prepare the full box of cubes for high-volume propagation by soaking in pH 5.5-adjusted water or dilute rooting nutrient solution in a propagation tray, then allowing to drain to natural moisture level before cutting insertion. For commercial-scale operations, a propagation tent or dedicated propagation chamber with T5 or LED propagation lighting and humidity management provides the environment needed to root large batches consistently. Grodan 4-inch cubes transplant directly into Grodan large blocks or coco/soil growing media. The box format integrates naturally into commercial propagation workflow without the per-strip packaging waste of smaller formats. Browse our full Grodan cube, block, and slab range and our complete propagation equipment and rooting media selection.

Browse the full range: Explore our Propagation Media range, part of the wider Propagation section at The Horticulture Company. Also in this range: EAZY PLUG TRAY OF 77 PLUGS, GRODAN SBS 36 TRAY OF 77, ROOT !T 60 PLUG PROPAGATOR, JIFFY 7 PEAT PLUG 38MM.