- Iris CENTRAL ASSOCIATION
- Dágla – Dahlia growers' association, gladiolus, A bulbous tuber
- SKALNIČKÁŘI
- UNION Florists
- SOCIETY FOR Landscape and Garden
- Gardening Exhibition Association
- CZECH gardening union
- HORTIFLORA – REGISTER horticultural companies - An online database searches, including specialized producers perennials, skalniček, medicinal plants, tuberous, water, etc., databases interest organizations, Unions and Schools, contacts
- Silva Tarouca Research Institute for Landscape and Horticulture (VUKOZ)
- Arboriculture Union CZECH REPUBLIC
2024
Helleborus