Grodan AO Plugs | 1.5in - 1.4in x 1.4in x 1.6in

V-Shape Stonewool Plugs for Leafy Green Propagation, 1.5in

Roots that tangle inside a propagation plug make for a rough transition when it's time to move into a larger block. Grodan AO Plugs use a V-shape design specifically to deter that tangling, on a stonewool substrate built for lettuce, leafy greens, and culinary herb propagation.

1.4in x 1.4in x 1.6in plugs, V-shape design, for hydroponic propagation.

Key Features & Benefits

• 1.4in x 1.4in x 1.6in stonewool plug — sized for lettuce, leafy greens, and culinary herb propagation.
• V-shape plug design — deters root tangling for a cleaner transition into larger growing blocks.
• Consistent, firm structure — holds shape reliably across a full tray of plugs.
• Balances nutrient absorption and oxygen levels — supports swift, even plant growth from the start.

Who Should Use Grodan AO Plugs (1.5in)

This fits growers propagating lettuce, leafy greens, or culinary herbs from seed or cutting who want a plug designed to transition cleanly into a larger growing block without tangled roots.

About Grodan AO Plugs

AO Plugs is manufactured using Grodan's stonewool process, in which molten rock is spun into fibers and compressed into a consistent, sterile growing medium, a method the brand applies across its full propagation and slab lineup.

Frequently Asked Questions

What crops are AO Plugs best suited for?

Grodan positions AO Plugs for cultivating lettuce, leafy greens, and culinary herbs specifically, rather than as a general-purpose propagation plug. The 1.4in x 1.4in x 1.6in size fits the smaller, faster-establishing root systems typical of those crops.

How does the V-shape design help propagation?

The V-shape is built to deter root tangling as roots develop inside the plug, which supports a cleaner transition when the plug is transplanted into a larger growing block. That reduces root disturbance during the move compared to a plug where roots have matted together.

How is the plug material made?

Like Grodan's other stonewool products, AO Plugs are crafted from molten rock spun into fibers resembling cotton candy and then compressed into cubes, blocks, or slabs. That process gives the plug a consistent, firm structure across a full batch.

How does this plug balance water and oxygen at the root zone?

The fiber structure absorbs nutrient solution efficiently while still maintaining oxygen levels around developing roots, rather than saturating and excluding air. That balance is what Grodan credits for supporting swift plant growth from seed or cutting stage.