HortGrow SmartEra™ Grow Cube 6in x 6in x 4in — Mesh Wrap — Coco Pith, Chips & Fiber

HortGrow SmartEra™ Grow Cube 6in x 6in x 4in — Mesh Wrap

HortGrow SmartEra™ Grow Cubes are precision-formed coco coir growing blocks that bring the advantages of a multi-component coco blend to an individual cube format — delivering the same high-performance coco pith, chips, and fiber blend found in HortGrow's SmartEra® Grow Bags, shaped into a rigid, mesh-wrapped block sized for hydroponic drip systems and standalone soilless production. The 6in x 6in x 4in cube provides a defined, structurally stable growing volume that supports roots through establishment and into full production, with the air-pruning benefit of the breathable mesh exterior driving dense lateral root development within the cube.

The mesh wrapping keeps the coco blend contained and structurally intact while allowing roots to air-prune at the cube's perimeter — the same beneficial process that drives vigorous root development in mesh pots and fabric containers. Roots that reach the air at the mesh wall are naturally pruned, stimulating the production of multiple new lateral root tips within the growing medium for a denser, more efficient root system overall.

Key Features & Benefits

• Precision Coco Pith, Chips & Fiber Blend: Each cube contains the same three-component coco blend used in SmartEra® Grow Bags — pith for moisture retention, chips for aeration and drainage channels, and fiber for structural stability and capillary water distribution. Together they create an optimized air-to-water ratio for vigorous root development in drip and soilless growing systems.
• Mesh-Wrap Air Pruning: The breathable mesh enclosure allows roots to reach the cube exterior and air-prune naturally at the mesh wall. Air pruning stops outward root elongation and triggers the development of multiple new lateral roots within the growing medium — creating a denser, more branched root system with more active root tips for improved nutrient uptake efficiency.
• Defined 6in x 6in x 4in Block Format: The precise cube dimensions provide a consistent, predictable growing volume for every plant in your system — simplifying plant spacing calculations, drip emitter placement, and bench layout in commercial growing operations.
• Ready-to-Use Pre-Filled: Arrives pre-filled and ready to use after pre-wetting with pH-adjusted water — no measuring, mixing, or preparation required. Consistent from cube to cube for uniform growing results across all plants in a batch.
• Triple-Washed & Buffered Coco: HortGrow coco is processed through a multi-stage washing and calcium-magnesium buffering protocol to deliver a clean, consistent starting EC and pH right out of the package.

Who Should Use This

HortGrow SmartEra™ Grow Cubes are ideal for commercial hydroponic growers who want the performance of a precision coco growing medium in an individual block format compatible with drip-to-waste and top-feed growing systems. They are also a natural choice for growers transitioning from stonewool blocks to coco-based media who want similar handling convenience with the added biological benefits of coco coir. Available in four sizes (6in x 6in x 4in being one option) to suit different plant sizes and production formats.

Compatibility

Compatible with all hydroponic nutrient programs. Pre-wet with pH-adjusted water (pH 5.8–6.2) before planting. Compatible with standard drip and top-feed hydroponic systems. Can be placed directly on growing slabs, trays, or in channel systems. Pairs naturally with HortGrow SmartEra® Grow Bag Slabs for a complete coco-based drip production system from starter cube to production slab.

Frequently Asked Questions

How do SmartEra™ Grow Cubes compare to stonewool blocks?

SmartEra™ Grow Cubes offer a coco-based alternative to stonewool blocks with similar handling convenience and defined block dimensions. Coco offers biological activity and natural buffering that stonewool lacks, while stonewool provides a completely inert, sterile growing environment. The choice depends on your growing philosophy and system design preferences.

Do I need to pre-wet the cube before planting?

Yes. Pre-wet the cube with pH-adjusted water (target pH 5.8–6.2) before inserting your transplant or starter plug. Ensure the cube is fully saturated and allow excess water to drain before planting. Check runoff EC to confirm the coco is properly primed for your nutrient program.

How does the mesh wrapping affect root development?

The mesh enclosure allows roots to reach the cube's exterior surface and air-prune at the mesh wall. When a root tip contacts air at the mesh, it stops elongating and the plant responds by producing multiple new lateral root branches within the growing medium — resulting in a denser, more efficient root system overall compared to growing in a solid-walled container.

What size cube should I choose for my plants?

Smaller cubes (4x4x2in) are suited for propagation, seedlings, and plants with lower root volume requirements. Medium cubes (4x4x4in, 6x6x4in) work well for mid-size plants in drip production systems. Larger cubes (6x6x6in) provide more root volume for vigorous, fast-growing plants that benefit from greater growing medium depth. Choose based on your target plant size and production cycle length.

Can SmartEra™ Grow Cubes be used with starter plugs or Gro-Plugs?

Yes. SmartEra™ Grow Cubes are compatible with standard starter plugs and Gro-Plugs. Cut or form a planting hole in the top of the cube sized to receive your starter plug, insert the rooted plug, and begin your drip irrigation program. The coco blend will support root transfer from the starter plug into the cube volume as the plant establishes.