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US customers

Why container-grown plug seedlingsMany foresters and nurseries refer to container-grown seedlings as “plug” seedlings. These seedlings are grown in cells in blocks or trays made from expanded polystyrene or polythene. PRT seedlings are grown in expanded polystyrene (dense white Styrofoam). The growing medium contains a high component of peat moss in most cases. By the time of harvesting, the roots bind the medium into a cohesive “plug” that keeps the shape of the cell.?

If you’re looking for faster growth and higher survival – and a way to meet evolving environmental regulations for barerootShort form: BR
Seedling crops grown in field beds and harvested without soil or “bareroot”.
 nurseries – then container-grown plug seedlings are the answer. The reliability and versatility of these seedlings reduces establishment costs and increases crop rotations in numerous ways:

  • Lower handing costs. Plug seedlings have a more compact root structure. So planters can carry more seedlings, which means fewer trips to reload planting bags. Better still, plug seedlings are easier and quicker to plant than bareroot seedlings. 
  • Higher survival rates. With a built-in protection system (the root plug) and little or no over-winter loss or seedling damage, plug seedlings enjoy high survival rates – usually over 90% after the first year, over 85% after the second.
  • Better seed usage. We grow container seedlingsContainer seedlings are grown as “plugs” in containers. The important aspect is that their roots are not damaged during the harvesting process and, as a result, they generally perform better than bareroot products. See Plug Seedlings. in carefully controlled and monitored environments. So you get better germination, use less seed and reduce seed-collection costs.
  • Shorter planning horizons. The majority of our container crops are produced in a single year, compared to two- and three-year rotations for bareroot seedlings. Consequently, planning and production cycles are shorter and simpler.
  • Hardier seedlings. Plug seedlings are more tolerant to drought conditions, better suited to remote locations and grow faster than bareroot seedlings.

We custom-grow plug seedlings to suite site characteristics and customer requirements.

In the Pacific Northwest, our Bareroot Replacement Program is helping timberland owners realize the benefits of large, robust seedlings to achieve faster crop rotations.

In the US Midwest, foresters are using a combination of 1+0 and 2+0 container-grown plug seedlings to establish plantations with lower site preparationAny of a number of methods used to modify planting sites to improve the ability of seedlings to establish and grow. Common methods include burning, mounding, disc trenching and piling. In the US, herbicides are commonly used for site preparation., tending and refill-planting costs

To learn more about our container-grown plug seedlings, please contact a PRT representative in your area.