What is the best way to make a windowsill wide enough to hold potted plants?

For a wider windowsill, set a 6-inch board on top of or level with the sill and support it on large angle-irons or wood cleats fastened to the apron under the sill.

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Previous How can I grow houseplants in sunny windows over radiators?
Next Do I have to use glass for plant shelves built across a window at several levels?


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