• Grodan A-OK Starter Plugs - 1.5 Inch No Wrap (98 Plugs)
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Product benefits

  • Propagation Support
  • Consistent Performance
  • Watering Balance
  • Efficient Nutrient Use
  • Air-Water Balance
  • Root Development
  • Easy Setup
  • Transplant Support

This product may offer additional benefits beyond those listed.

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Grodan A-OK Starter Plugs - 1.5 Inch No Wrap (98 Plugs)

Indoor Outdoor
$20.88
$20.88
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OTHER AVAILABLE SIZES / MODELS:

1.5 Inch (98 Plugs) 1.5 Inch No Wrap (98 Plugs)
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Product benefits

  • Propagation Support
  • Consistent Performance
  • Watering Balance
  • Efficient Nutrient Use
  • Air-Water Balance
  • Root Development
  • Easy Setup
  • Transplant Support

This product may offer additional benefits beyond those listed.

Description
Grodan A-OK Starter Plugs - 1.5 Inch are stone wool starter plugs for starting seedlings and rooting stem cuttings, built for uniform propagation. This is clean propagation media that supports consistent early rooting and even starts across a batch.

These starter plugs are built around homogeneity and reliability, so each plug behaves predictably during the most sensitive stage of growth. The finely woven stone wool creates a perfect environment for young roots, helping roots develop evenly through the plug. With uniform germination as the goal, the material structure is designed to support uniform seedling results and stronger early plant consistency.

Each plug is made with uniform density, firmness and fibrous structure to help keep conditions consistent from plug to plug. That uniform density, firmness and fibrous structure supports even distribution of water, nutrients and pH-value through the plug, which can have a beneficial effect on germination results and initial crop development. When you want fewer weak starters and less variability, this level of consistency is the point.

Grodan A-OK Starter Plugs are also designed for smooth handling in real propagation workflows. The shape and firmness support automatic or manual processing, which makes large batches easier to manage with less disruption. A tapered bottom for improved transplanting helps the plug move forward cleanly into the next stage without losing its structure.

These starter plugs are suited to hydroponic systems where uniform starts and clean handling matter most. They’re a good fit for growers who want reliable propagation, strong early rooting, and more consistent seedlings or cuttings without changing their overall propagation approach.

Product benefits: Propagation Support; Consistent Performance; Watering Balance; Efficient Nutrient Use; Air-Water Balance; Root Development; Easy Setup; Transplant Support; Indoor; Outdoor.

Derived from: Basalt; Chalk Rock; Hydrophilic Binder.

Derived From
Basalt
Chalk Rock
Hydrophilic Binder

Frequently Asked Questions
Does basalt help plants directly, or is it mostly for soil structure?

Basalt mostly helps plants indirectly by improving the root-zone environment through better drainage, oxygen flow, and long-term soil stability, while only slowly contributing minerals as it weathers over time. It’s unique because its biggest benefits come from physical soil performance and consistency rather than quick nutrient release like fast-acting amendments.

Read the full guide

Why is chalk rock added to rockwool media?

Chalk rock helps stabilize the root-zone by buffering against sudden pH drops while slowly contributing calcium, which supports strong roots and healthy new growth. It’s unique because it actively resists rapid acidity shifts instead of behaving like a purely inert media ingredient.

Read the full guide

What does a hydrophilic binder actually do in the root zone?

A hydrophilic binder acts like a water-loving glue that helps tiny particles stay evenly placed while also helping water spread and re-wet more uniformly, which supports steadier root function. It’s unique because it improves both physical cohesion and water behavior at the same time, unlike simple adhesives or simple wetting ingredients that only do one job.

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