Unrooted Cuttings – often abbreviated to URC – are harvested from a mother plant, which is normally produced from high health status stock to ensure optimum quality and health.

This is where high tech meets horticulture. Plants are grown on a jelly-like substance called agar in sterile laboratory conditions.

A Plug is a rooted young plant in a 3.5cm cell, supplied in trays of 104 cells. We offer well-established Plugs for all our URCs varieties plus many more.

As the name suggests, Jumbo Plugs are larger versions of regular Plugs. Available in 7cm or 9cm size cells, Jumbo Plugs are a convenient way to obtain young growing plants with better developed root systems.

Herbaceous perennials are defined by the fact that they die back to an underground root system to overwinter. These root systems bulk up over the years, and as they get bigger can be divided to produce new plants, which in turn can be grown on to increase their size.

Walter Blom Plants is committed to improving the Health Status of all the stock we have been selling since 2010. All varieties we introduce are tested for all viruses relevant to that Genus. We work with the NAKT in Holland to identify all viruses known to affect each Genus and test for those prior to build up our mother stock.

A virus indexed variety VIP in the catalogue is a variety that has been tested and deemed free of the viruses it was tested for up to the point of testing. We do not claim varieties are free of viruses we use the best knowledge available to identify all viruses that have been found to cause a problem in any genus and use PCI testing of our mother material before initiation into tissue culture for all those pathogens. That means we are certain that every plant that originates from this material is of the highest possible health status. Every aphid brings with it the risk of re-infection but we make every effort to ensure you receive the very highest quality material.

Protected plants

What does EU APP or PPAF mean?

This stands for either European Plant Breeders rights or US Plant Patent Applied For. Once the EU plant breeders rights or US patent has been granted it is assigned a EU# or PP#. Propagation without a license and export outside of either the Europe or North America is prohibited for all EU applied and protected plants and all US patent-pending and patented plants respectively.All advertisements (including electronic) for patent-pending and patented plants must list the appropriate European PBR or US patent information. In addition to listing the patent information, labels for all varieties that are either EU applied or granted and US patent-pending and patented plants must also state that propagation is prohibited.