Diagrams depicting Precision-drilled shape of plug effects of humidity and air.Advice on this seed holes The automatic sorting and transplanting of aspect is available from Grodan. plants requires plugs that are fixed and precise in shape.The refined drilling technique in Grodan plugs with their homogeneity, the Grodan production line generates plugs, shape and strength provides the perfect which meet these requirements. Each plug, basis for optimum germination and uni- therefore, has the same volume and the same form seedling results. amount of available water. Loose fibres that are released during production are almost completely removed.This eliminates residue • A clean, hygienic and inert substrate in the plugs and produces a seed hole free of • Up-to-date advice for users loose fibres. In this way, surface sealing cannot Figure 1: Conical shape. What can Grodan offer you • Supply of plugs in new trays disturb germination. Product specifications Root growth throughout the entire plug • Suitable for germinating vegetable and ornamental crops The homogeneous Grodan plugs have a pre- • Available in various types of trays dominantly vertical fibre structure providing • Seed hole available in 2 variants equal resistance to each root.As a result, the • Pores are evenly distributed, meaning that root grows throughout the entire plug. Please note that the type of tray, and whether or not • Predominantly vertical fibre structure the plug is directly in contact with the lower • Suitable for manual and automatic surface of the tray, is also influential. For All our information and advice is compiled with the greatest possible care and in accordance with the state of the art; however we are unable to assume any liability for the content. May 2003. Figure 2: Deeper seed hole. example, with regard to root growth and the More information Grodan A/S Denmark Tel.: +45 4656 0400 Fax: +45 4656 1211 E-mail: [email protected] Grodan BV The Netherlands Grodan® Plugs Uniformity for optimum germination

Uniformity for optimum germination throughout the entire plug and good airflow is guaranteed due to the large pores. Consistent shape of the seed hole The seeding process can be done in a variety of systems. Grodan has developed the optimum seed holes to match these Grodan provides cultivation solutions that yields a maximum number of the seed cannot roll over the edge and out of the plug.The holes are uniform in depth The shape and strength of the plug is to ensure there is always sufficient and equal seed depth. In addition, there is fies both manual and automatic enough space for the roots...