• The Silva Tarouca Institute for Landscape and Ornamental Gardening, Publ.Res.Inst. (VUKOZ,v.v.i.) 

www.vukoz.cz

• Union of Botanical Gardens in the CzechRepublic

www.ubzcr.cz

• Průhonický park

www.pruhonickypark.cz 

• Institute of Botany, Academy of Sciences of the CzechRepublic

 www.ibot.cas.cz

•  Czech Landscape and Garden Society, Civic Association 

www.szkt.cz

• Union of Landscape Contractors, Professional Association

www.szuz.cz

•  Czech Group of Perennial Growers

 www.pereny.info

• Plants with a story – photo competition of the Institute for Experimental Botany, Academy of Sciences of the Czech Republic

http://fotopribeh.avcr.cz/

• About roses

www.ruze.wi.cz 

• A Pan-European seed-list search system

www.plantnetwork.org/ebg/