Martha Stewart shares the surprising essential tool everyone should have in their garden bag – and it's on sale for under $30 at QVC

Martha Stewart.

Personally, I've never thought of a knife as one of the most essential garden tools, but Martha Stewart does.

In a recent interview with QVC, the doyenne of homes shared that her most-used pruning tool is a tomato knife (available at QVC). She stated: 'In my garden bag, my essential tools include, well, the tomato knife, which is great for pruning.'