Free images results:
 

Horticulture pictures, stock photos and images

 
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Grass Royalty Free Stock Photo
Author: Dshawley
Flower Stock Image
Author: Ostenbaken
Garden Time Stock Photography
Author: Tonyd
Moss Stock Photography
Author: Chrisharvey
Hyacinth Royalty Free Stock Photos
Author: Rbouwman
 
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Also, here are some commercial RF-licensed images that match your search criteria:  
Horticulture Stock Photos
Author: Cycv