Grodan Round Macro Plugs w/Slit, case of 2000

Pre-Slit Round Stone Wool Propagation Plugs, Case of 2000

A propagation plug without a pre-cut slit or opening for a cutting or seed adds an extra prep step at a stage where consistency across hundreds or thousands of plugs really matters. Grodan Round Macro Plugs ship with a slit already cut, so cuttings or seeds go straight into the plug without an on-site cutting or drilling step.

This case of 2000 plugs suits commercial propagation operations running high plug counts through a single order, cutting per-plug handling time across the whole batch.

Key Features & Benefits

• Pre-slit design — cuttings or seeds go directly into the plug without an on-site cutting step.
• Round stone wool format — a consistent, engineered fiber structure across every plug in the case.
• Chemically inert media — doesn't alter the pH or nutrient balance of the feed solution.
• Case of 2000 — sized for high-volume commercial propagation runs.

Who Should Use Round Macro Plugs

Commercial propagation operations running high plug counts through a single order, where per-plug prep time adds up across the batch, are the best fit for the pre-slit format and case quantity.

About Grodan

Grodan pioneered engineered stone wool growing media in 1969 and operates today as part of ROCKWOOL Group, supplying propagation plugs alongside its block, slab, and cube product lines to professional growers.

Frequently Asked Questions

What does 'pre-slit' mean for these plugs?

Each plug ships with a slit already cut, so a cutting or seed goes directly into the plug without needing to cut or drill an opening on site. This saves a prep step that would otherwise be repeated across every plug in a batch.

How do I use a Round Macro Plug for propagation?

Insert a cutting or seed directly into the pre-slit opening, then place the plug in a tray sized to hold it upright, such as Grodan's Gro-Smart Tray. Keep the plug consistently moist rather than saturated while roots establish.

Is this plug chemically inert like Grodan's other stone wool products?

Yes, it uses the same chemically inert stone wool fiber as Grodan's blocks and slabs, so it won't alter the pH or nutrient balance of the feed solution. Growers control the root zone through their nutrient program.

Why order in a case of 2000?

A case of 2000 is sized for commercial propagation operations running high plug counts through a single order, reducing per-order handling and reorder frequency compared to smaller case sizes. Smaller-volume growers may find that quantity is best split or shared across multiple grow cycles.

Can Round Macro Plugs be transplanted into a larger Grodan block or slab later?

Yes, a rooted plug is meant to be transplanted into a larger block or slab, such as a Gro-Block or Gro-Slab, once roots have established in the plug. This is the same plug-to-block transition used across Grodan's stone wool propagation system.