Name: 4 Inch Redrock Rockwool PRO Grow Block for Hydroponics | 6 Pack + Twin Canaries Chart
Brand: Twin Canaries Liquid Volume Conversion Chart
SKU: 159
Price: 16.990000000 USD
Availability: InStock
Rating: 4.32 (23 reviews)

4 Inch Redrock Rockwool PRO Grow Block for Hydroponics | 6 Pack + Twin Canaries Chart

$16.99

23 reviews

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                                        Rockwool Cube for Hydroponics & Propagation – This 4” x 4” stone wool cube is engineered for early-stage growth and propagation in hydroponic systems, perfect for leafy greens, herbs, and fruiting crops.
Pre-Formed 42/40 Planting Hole – Each block includes a standard 42/40 mm hole designed for clean and easy transplanting of starter plugs or cuttings.
Inert Stone Wool Composition – Manufactured from dense, U.S.-sourced rock wool for a sterile, soil-free environment that supports consistent moisture and air balance.
Efficient Moisture Retention – These rock wool planting cubes retain water evenly while allowing proper dry-back and air exchange, helping maintain healthy root zone conditions.
Compatible with All Major Systems – Ideal for use in ebb & flow, drip irrigation, and other hydroponic setups—trusted by greenhouse operators, indoor growers, and commercial cultivators.

                                    