Grass seed mix volume versus weight

Old 05-20-16, 12:47 PM
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Grass seed mix volume versus weight

I'm starting to prepare to replace a sizable lawn, primarily with bluegrass. Looking at sun/shade grass seed mixes for the northeast, I came across a product with 40% fine fescue, 34% perennial ryegrass, and 26% bluegrass - all calculated by weight.

I want 50% or more bluegrass and only a small amount of ryegrass. I know, however, that bluegrass is 2 million seeds per pound, fescue is 500,000 seeds per pound, and ryegrass is 200,000 seeds per pound. Thus, the mix I'm considering will give me 50% bluegrass seeds and fewer ryegrass seeds by volume.

Is this the correct way to figure out the mix I want to get a primarily bluegrass lawn or is 50% bluegrass considered to be 50% by weight?
Old 05-20-16, 12:54 PM
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I think you're overthinking this in the fact that 50% of a seed in the mix does not mean 50% of the lawn will be that grass. I'd say you're in the ballpark but keep in mind the rye seeds can germinate in as few as 3 days whereas the bluegrass seeds can take 3 weeks or more.

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