Forest23.05.2011

Bark mulch tops off the green area

Koskisen's bark for mulch

Koskisen's bark for mulch

Around 150,000 loose cubic metres of spruce and pine bark is generated annually at Koskisen’s production facilities. Until now, the bark has been incinerated in the company’s bio boilers, but due to the high demand, some of it will be sold as bark mulch for landscaping purposes.

Selling bark for mulch is a new business for Koskisen. It is a natural extension to existing operations, as Koskisen already utilises softwood logs from top to bottom either in production or as bioenergy.

Spruce and pine bark can be used as is around the base of any plant, and their use has rapidly increased in recent years. In areas of active construction, the demand for bark mulch is also high.

Koskisen is ideally located just a stone’s throw from the growth centres of Southern Finland.

- Bark reduces evaporation and prevents weed growth. In addition to the practical benefits, it also gives green areas a finishing touch, says Koskitukki’s Bioenergy Manager Juha Hyvärinen.

Check every two years

The bark mulch layer should initially be about 7–10 centimetres thick. You should then check the situation every two years and, as the mulch decays, add 3–5 centimetres of new mulch. The soil underneath the mulch must be weed-free in order to stay that way. A sufficiently thick layer of mulch also prevents weed seeds blown by the wind from taking root.

According to Hyvärinen, Koskisen delivers spruce and pine bark mulch mostly to landscaping contractors, city landscaping departments and garden centres. The first deliveries were made in the beginning of May.

Consumer clients can buy mulch at garden centres, among other places.

- The high season is likely to last until the end of June, Hyvärinen reckons, and asks all those interested in bark mulch to contact him.