1"x 1"x 1.5" AO25/40 Rockwool Cubes

Sold online as a case of 30 pads or box of 5 pads with free UPS shipping to the contiguous United States. For different quantities, please call 330-302-4203 for pricing or custom shipping options. 

Each pad contains 200 cubes. 

The Grodan AO 25/40 rockwool propagation cube sheet (1″ × 1″ × 1.5″ per cube) provides a premium, consistent medium for seed starting, deep-water culture and hydroponic applications, especially for leafy greens, herbs and starter transplants. 

Key Features

• Precise Dimensions & Format — Each pad contains 200 cubes sized approximately 1″ × 1″ × 1.5″ (25 × 25 × 40 mm) ideal for standard 10″ × 20″ trays.

• Optimized Air/Water Balance — Engineered to maintain the ideal moisture-to-air ratio in the root zone, supporting strong, uniform root growth.

• Uniform & Consistent Structure — Manufactured using Grodan’s patented stone-wool technology to ensure consistent density and shape, easing automation and transplant handling.

• Pathogen-Free and Nutrient-Neutral — These rockwool cubes do not leach substances, lock up nutrients, or release unwanted compounds, offering a clean, controlled start for seedlings.

• Versatile Crop Compatibility — Ideal for hydroponic systems, greenhouses, NFT channels, vertical farms and traditional trays; widely used for lettuce, herbs, cuttings and ornamentals.

Benefits for Growers

• Faster, More Uniform Germination & Early Growth — With standardized plug quality and optimized root zone conditions, growers achieve more predictable seed-to-transplant timelines.

• Ease of Handling & Transplanting — The cube format and uniform geometry facilitate both manual and automated seedling processes, reducing labor time and error.

• Scalable Production Across Systems — Whether you’re on raft tables, NFT channels, or deep-flow trays, these cubes integrate seamlessly and support efficient production scaling.

• Improved Root Health, Reduced Risk — With superior aeration and moisture control, seedlings are less likely to experience root suffocation or stagnation, improving overall crop quality.