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My back yard is full of weeds (fresh and green). I wanted to till the yard, my question is: Do I have to get rid of the weeds before I till? Or would it be ok to till the ground with the weeds knowing that the weeds will grow back of course.
 

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Are you looking to seed the yard with grass?

I can tell you what my landscaper did when I had a lawn seeded. They tilled and graded the soil with weeds and all. Then sprayed RoundUp on the tilled soil, layed down a layer of topsoil and seeded. My lawn turned out beautiful.

I've been told RoundUp goes inert after 24 hours. So, if you're not going to put topsoil down: till the soil, RoundUp, wait a day or two, then seed.
 

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Remodeling Contractor
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Till the soil with the weeds. Use a pre-emergent crab grass and weed killer to prevent the weeds from returning. I use 12-24-11 w/ Tupersan. It is specifcally a pre-emergent crab grass preventor when also planting new grass seeds.
 

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We tilled with the weeds, and mixed in a weed and seed fertilizer into the topsoil/compost that we put down. A week later we planted grass.
 

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Don't know it all, yet!
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Why the tilling? Are you going to re-seed or sod? If so, what lawn?
Where are you?
 

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I sprayed my entire yard with roundup, when the grass turned yellow, had the whole thing raked out and immediately seeded, grass came right in and no crab grass/weeds (yet)
 

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Mowing my life away.
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Are you looking to seed the yard with grass?

I can tell you what my landscaper did when I had a lawn seeded. They tilled and graded the soil with weeds and all. Then sprayed RoundUp on the tilled soil, layed down a layer of topsoil and seeded. My lawn turned out beautiful.

I've been told RoundUp goes inert after 24 hours. So, if you're not going to put topsoil down: till the soil, RoundUp, wait a day or two, then seed.
Spraying roundup on soil is a waste of roundup. Roundup works through uptake from the leaves. You're better off spraying first, waiting a few days and then tilling.

And roundup=inert after 24-48 hours.

But if you must spray Roundup on your soil, buy Kleenup pro or Honcho. It's the exact smae thing at half the price.
 

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Spraying roundup on soil is a waste of roundup. Roundup works through uptake from the leaves. You're better off spraying first, waiting a few days and then tilling.

And roundup=inert after 24-48 hours.

But if you must spray Roundup on your soil, buy Kleenup pro or Honcho. It's the exact smae thing at half the price.
I agree, spraying roundup AFTER you tilled is pointless.
 

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I agree, spraying roundup AFTER you tilled is pointless.
Just a point to ponder. IF the soil is completely raked clean, this is correct. Some people go ahead and spray just as a precaution in case there are small bits of weed that will sprout back up, or even pieces of bermuda roots.
So I wouldn't say carte blanche that it is pointless.
 
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