Hi…..friends here i will show how create a stock vector illustration 3d plant images.
In this tutorial you will learn how to create a plant quick and easy.
[1]-Create NGon with the help of NGon tool
Place the object like me 
[2]-Apply the extrude modifier with the amount of 4.0 
[3]-Convert the NGon into the editable poly and select the polygons 
[4]-Now apply the insert and bevel polygons with good following amount as shown below 
[5]-Your object should like this 
[6]-Create cylinder with the following size and apply the taper modifier with the good following amount as shwon below 
[7]-Create foilage with the following size and place like me 
[8]-Make the materials like me 
[9]-Now you are done it enjoy the final output as shown below 