Grodan A-OK Starter Plugs - 1.5-Inch - Pre-Cut - Loose (Case of 2310) (8/Plt)

Grodan A-OK Starter Plugs – 1.5" Pre-Cut, Loose (Case of 2,310)

Grodan A-OK 1.5" Starter Plugs are the professional choice for fast, uniform propagation of seedlings and stem cuttings in hydroponic systems. Made from premium, finely woven stone wool (rockwool), these plugs deliver the ideal air-to-water ratio and structural stability that young roots need to explode with growth from day one.

Key Features & Benefits

• Perfect 1.5" × 1.5" square size with pre-drilled planting hole and tapered bottom for effortless transplanting into Grodan Gro-Blocks™ or any standard 1.5" block system.
• Delivered loose in cases of 2,310 – ideal for large-scale nurseries and commercial propagators who need maximum flexibility and easy automation.
• Outstanding uniformity in density, firmness, and fibrous structure ensures even water and nutrient distribution, consistent pH, and predictable germination/rooting results batch after batch.
• Plugs fit perfectly into the Grodan Gro-Smart® Tray and standard 10/20 propagation domes during the rooting phase, then drop straight into Gro-Blocks™ without disturbance.
• Proven to produce strong, healthy white roots quickly; roots fully colonize the plug and emerge vigorously from all sides, signaling perfect transplant timing.
• Inert, sterile, and pathogen-free – eliminates disease carry-over and gives you a clean start every time.

Recommended Use

1. Saturate with 1.5 EC nutrient solution (pH 5.5–6.5).
2. Insert fresh cuttings (dip only the cut end in rooting hormone) ½" deep or place one seed in the pre-made hole.
3. Root under dome until strong white roots show on all sides.
4. Transplant directly – plug and plant – into soaked Grodan Gro-Blocks™ (perfect fit, no guesswork).

Whether you’re running a commercial cloning operation or producing thousands of seedlings, Grodan A-OK 1.5" Loose Starter Plugs remove the variables and give you vigorous, uniform young plants that transplant seamlessly into the next stage of your growing system.

For detailed protocols and research-backed best practices, download the official Grodan Propagation Technical Bulletin.

Case contains 2,310 loose 1.5" A-OK Starter Plugs – the gold standard in professional hydroponic propagation.