All these plants and flowerpots are not just 3D models, but 3D models for which there are
real life counterparts and can be purchased for landscaping your projects from Treez Collection.

Plants:
Grass Sedge bush with green sultans (20.1040N, height 900mm): https://treez.ru/cat/good/20.1040N.html 
Grass Sedge bush without sultans (20.1040X, height 600mm): https://treez.ru/cat/good/20.1040X.html 
Weeping willow (10.56208N, height 2400mm): https://treez.ru/cat/good/10.56208N.html 
Moss ball (Art object) (10.0313050, 400mm and 10.0313051, 550mm): https://treez.ru/cat/good/10.0313050.html 

Flowerpot:
TREEZ Effectory Flowerpot - Concrete - High Cone - White Sand (height 610mm and 900mm): https://treez.ru/cat/good/41.3319-02-020-BE.html 
TREEZ Effectory Flowerpot - Beton - Design-Bowl - White Sand (height 500mm): https://treez.ru/cat/good/41.33-02-24-119-BE.html?SECTION_ID=4037 
TREEZ Effectory Flowerpot - Concrete - Low spherical bowl - White sand (height 200mm and 260mm): https://treez.ru/cat/good/41.3317-02-006-BE.html 

Those who work in V-Ray version lower than 3.1, be careful, in the materials in the BRDF section there is Microfaset GTR (GGX), if your version is older than 3.1, the BRDF field will be empty. Select Blinn, Phong or Ward - what is preferable for you.

For Corona render, it is recommended to install version no lower than 1.5, since the glossiness of materials is configured taking into account PBR.