Irish peat

Why does Vigorplant use Irish peat?

It is a well-known fact that professional substrates must possess the following characteristics:

Level of aeration

Important for ensuring the proper amount of oxygen for root development, thus guaranteeing optimal nutrient absorption.

Irish peat is harvested using special mechanical systems that coarsely crumble the material, thus only resulting in small quantities of fine particles, or dust.

Structural and mechanical stability

Structural stability: this characteristic of the peat protects it against microbial breakdown, or SLUMPING.

SLUMPING is intended as the peat’s actual collapse, decline or contraction within the pot due to the particularly pronounced microbial degradation that takes place when using white peat, or rather particularly young varieties.


  • Irish peat = Extremely low levels of Slumping.
  • White peat = Extremely high levels of Slumping.

Mechanical stability: this term is used to indicate the peat’s propensity to break during mechanical processing..

Peat of low mechanical stability forms extremely fine particles, which reduce its air capacity.

Irish peat = high mechanical resistance.

Irish peat has a high lignin content, which renders it "harder" than white Baltic peats, and therefore more resistant to mechanical stress.

Buffering capacity

The ability to counteract variations in pH and salinity.

Irish peat has a rather high buffering capacity thanks to its particular degree of humification and the type of sphagnum of which is mainly comprised.

Irish peat = sphagnum imbricatum = a wider-branching moss with broader leaves that increase its exchange surface.

White Peat = another species of moss that’s less well-structured and thus has a lower buffering capacity (sphagnum balticum, sphagnum cuspidatum etc.).