Question
QUESTION: How do I kill the grass seeds in my garden to keep them from sprout this Spring and what should I use to do that?

ANSWER: Hi, If this is a vegetable garden, I'd use Treflan.  Read the label carefully.  It's applied pre-planting on many things, post-planting on some.  Around ornamentals or in the lawn, I'd use Dimension.  Again, read the label carefully.  Pre-emerges form a barrier at the soil surface that kills many seed as they germinate. Any cultivation will destroy the barrier, so do any tilling or weed removal prior to application.  Jim

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QUESTION: Would Roundup act as a Pre-emergents or not? I'm planting my Devil Claw seeds this Spring. Will that disappear before planting time?

Answer
Round-Up (glyphosate) is a post-emerge non-selective herbicide.  It kills plants, but does nothing to seeds or to the ground.  You can spray existing plants and replant almost immediately.  It will not stop desirable or undesirable seed from coming up.  You need one of the pre-emerges I mentioned earlier.  I'd treat the garden, start your seed inside and then transplant to the garden.  Jim