Why growers worldwide choose Baltic peat moss for their mixes

Baltic peat moss is useful to growers for a practical reason: it can be selected by peat type, particle size and the amount of processing needed before use. A fine unlimed grade for blending into seed media is a different purchase from a coarse grade for an acid-loving crop.

For an international buyer, the growing properties are only part of the decision. The specification must also be clear enough to repeat, and the packaging must suit the journey from Lithuania or Latvia to the growing site.

Baltic origin tells you where to start, not what to order

The peat used in professional Baltic growing media comes from high-moor peat deposits associated with raised bogs. Sphagnum is the material growers are usually seeking, but its properties depend on how far it has decomposed and how it has been screened. “Baltic peat moss” is therefore a useful description of origin, not a complete substrate specification.

SOLVIKA works with peat from Lithuania and Latvia. Its slightly decomposed white Sphagnum peat is distinct from the more decomposed Lithuanian dark-brown Sphagnum peat. Both are available unlimed, with a published pH in water of 3.5 to 4.5, but they do not behave identically in a mix.

White peat generally helps a grower keep more air space in the root zone. Dark peat holds more water and is heavier, which also matters when freight is being planned. Neither characteristic is automatically better: the choice depends on the container, crop, irrigation method and other ingredients in the recipe.

Ask first whether you need an ingredient to blend yourself or a prepared growing medium. SOLVIKA supplies unlimed peat moss, pH-adjusted peat without fertiliser, and ready-to-use seeding and potting substrates. Ordering by the intended use alone can miss an important distinction, particularly where the crop needs either acidity or a starter fertiliser.

Sphagnum structure matters at the roots

A good peat specification describes structure as well as origin. Fine particles can give close contact around small seeds and increase the water-holding capacity of a blend. Coarser particles are often chosen where a grower needs more air space or wants a container medium to retain structure over a longer crop cycle.

That is why one screening cannot cover every stage of production. SOLVIKA lists fine white peat at 0-10 mm, medium white peat at 0-20 mm and medium-coarse white peat at 0-40 mm. These are screened fractions, not instructions to use the same irrigation schedule with every grade.

Unlimed peat also gives the formulator room to set the chemistry of a mix. SOLVIKA publishes an electrical conductivity in water below 0.3 mS/cm for its peat moss, indicating low initial salt content. The acidity and low starting nutrient content mean most crops will need a deliberate pH and feeding plan rather than an assumption that raw peat is ready for planting.

Blueberries illustrate the exception on pH. They are commonly grown in an acidic root environment, so unlimed white peat can be a useful base. SOLVIKA identifies code 141, a 0-40 mm white peat, as its usual base substrate for planting two-year-old blueberries. The final planting mix and irrigation water still need to be assessed together.

A consistent grade begins with a precise specification

Professional buyers need the next delivery to fit the same process as the first. The useful questions are concrete: white or dark peat, unlimed or pH-adjusted, which screening, and which packaging? If you manufacture substrates, also state the pH and fertiliser charge you intend to add yourself.

SOLVIKA's published figures give a basis for that conversation. Its peat moss pH is measured to EN 13037, electrical conductivity to EN 13038, moisture to EN 13040 and packaged volume to EN 12580. Figures on product pages are typical values for a grade rather than a guarantee for an individual batch, so ask for a batch analysis if your purchasing specification requires one.

For white peat, the choice of screening helps make an order repeatable. Latvian Sphagnum peat moss is listed in fractions including 0-5 mm, 0-10 mm, 0-20 mm and 0-40 mm, as well as selected fractions that exclude fines. Stating the exact fraction is more useful than asking for “fine peat”, which different buyers may interpret differently.

A prepared substrate needs a different check. SOLVIKA's pH-adjusted base peat contains a wetting agent but no fertiliser, leaving the grower to dose a recipe. Its listed seeding and propagation mixes carry a starter charge of 1.0 kg/m3 NPK 14:16:18, while the listed professional potting mixes carry 1.5 kg/m3. Confirm which approach matches your feeding programme before ordering.

Choose the peat around the crop and the way you grow it

Start with the crop, then work backwards to the physical and chemical requirements of the medium. A plug tray has little room for large particles, while a larger container may benefit from a more open structure. Watering frequency, crop duration and the ingredients already in your mix can change the best choice.

• Seed trays and plugs. Look at a fine fraction that fills small cells evenly. Decide whether you want unlimed peat for your own recipe or a seeding mix with its starter charge already included.
• Potting on. Compare medium and medium-coarse structures against your container size and irrigation practice. If you need a ready-to-use mix, check the fertiliser level rather than selecting on particle size alone.
• Acid-loving crops. Consider unlimed white peat where a low-pH base is required. Check the crop specification and irrigation water before deciding how to build the complete medium.
• Your own blending line. Specify peat type, fraction and whether pH adjustment has already been done. That prevents an unintended limestone or fertiliser addition from changing your recipe.

Trial a proposed change under your own growing conditions, especially when moving between fine and coarse fractions or between white and dark peat. Compare how the medium wets, drains and settles in the actual container, not just how it looks in the bag. The appropriate grade is the one that works with your crop management.

Port access makes the export specification practical

International supply depends on more than having the right peat. Containers load through Klaipeda Port in Lithuania or Riga Port in Latvia, while European road deliveries go by full truck load direct from production sites. That gives buyers two clear routes to discuss, depending on their destination and delivery requirements.

Packaging affects handling and the amount that can be loaded. SOLVIKA offers different bag and big-bale formats according to product, so do not assume that every grade comes in every size. A buyer filling a substrate line from big bales has different unloading needs from a distributor taking pallets of bags.

For planning, a 40 ft high-cube container takes up to 24 big bales of 5500 L or 6000 L, or up to 30 pallets of 250 L bags. A full truck takes up to 26 big bales or up to 32 pallets of 250 L bags. These are approximate, format-dependent figures, and SOLVIKA confirms the load for the chosen product and shipment. More formats are set out on the logistics page.

For a cross-border enquiry, give the destination country, port of discharge or full delivery address, and preferred delivery term. Containers ship FCA, FOB, CFR or CIF from Klaipeda or Riga. Trucks go EXW or DAP, and DAP is only for delivery within the EU. Shipment paperwork can include a commercial invoice, packing list, certificate of origin, phytosanitary certificate, an EUR.1 movement certificate where it applies, and a bill of lading. Confirm import and customs requirements for your destination with your customs broker or the relevant authority.

Frequently asked questions

Send your crop, required peat type and fraction, packaging, volume, destination and preferred delivery term through the contact form. Include your current specification if you want a grade recommendation or a delivered quotation.