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:
Olive Topiary Natural (Prime series) (10.0624238N, height 1300mm): https://treez.ru/cat/good/10.0624238N.html 
Olive Topiary Ball (Prime series) (10.0624239N, height 1450mm):
https://treez.ru/cat/good/10.0624239N.html 

Flowerpot:
TREEZ Effectory Flowerpot - Savage Garden - Design Vase - Capri (height 430mm and 620mm): https://treez.ru/cat/good/41.33-25-24-125-YL.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 not lower than 1.5, since the glossiness of materials is configured taking into account PBR.