Riverstone | MONT Standard 4' x 8' Greenhouse Extension Kit GREENHOUSE The Whitney Greenhouse is named

The Whitney Greenhouse is named after the inventor of the cotton gin

George Washington Carver

We offer our customers the ability to choose from 10 sizes and designs for your specific needs

Integrated gutter controls rain drainage

this design allows for deep rooted plants and perennials

Riverstone | MONT Standard 4' x 8' Greenhouse Extension Kit GREENHOUSE The Whitney Greenhouse is namedThe MONT 4 foot extension kit is specifically designed for the MONT line of greenhouses. The idea is simple, as your gardening greenhouse needs grow so can your greenhouse. The 4 ft extension kit allows for the expansion of your greenhouse. Each 4ft extension kit includes a 2ft x 2ft roof vent with automatic opener and gutters. When ordering your extension kit make sure that the color matches your existing greenhouse. It will work with the MONT