I disagree with the others. IMO grass clippings are better than no mulch at all.
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I think it depends on how many plants are to be mulched and in my main field the dimentions were 250X 90 ft, and I had usually 10 rows 250 ft long and grew many hundredsof plants and varieties each summer. As well as long rows of melons and potatoes and all kinds of squash, I think you get the picture.
The side garden I referred to was where I grew many different varieties of radishes, carrots, beans, beets, peas, chinese greens, etc,
So there was No way I could mulch all of them.
Just trying to clarify what my circumstanes were when you said that grass clippings are better than no mulch at all.
Carolyn