To control any nut sedge, and Yellow Nutsedge is the most common of the sedges found in our yards, you need to know something about how it grows. I have said before that sedges prefer growing in wet soils, and seem to grow most frequently in yards that have inground dprinkling systems where the soil is often kepp quite moist. This from Ohio State University, "Yellow nutsedge thrives under warm, wet conditions and can often be found in low, damp areas of lawns.", may help quell those that do not believe it, though I do doubt that.
Spraying with all of the plant poisons that you can get, unless you are a licensed pesticde applicator, will not harm this stuff, unless the favorable conditions that promote the growth are corrected and then you will not need to spend your money on those controls because if the conditions that favor the growth of Yellow Nutsedge are eliminated it will stop growing.

kimmsr, thanks for taking the time to reply.

The soil is very compacted but honestly not wet. There's no water source (lake, creek, pond, etc..) nearby, and as far as I'm aware hasn't been watered regularly in 3 or more years. I planted a few trees in the area and have kept them watered, but not the whole area because I was planning on re-seeding later anyway. It is on a slight slope and since the water seems to run off fairly easily I put them on a drip hose and watered deeply for several hours a couple of times a week. After watering, the ground around the trees did not appear to be wet; on the contrary it was so hard and compacted I had a difficult time in places even getting a shovel in it to dig up the weeds.

I would love to be able to identify and stop the conditions which favor the growth of this stuff. Not sure if it matters, but the variety of nutsedge growing is purple. It's very warm in the summers here in north Texas... I can't do much about that unfortunately. The soil is compacted (not sure if that's a contributing factor or not), but I do plan on areating to give the grass roots a better chance of grabbing hold of something. And as I said, the soil is not wet. Is there anything else I need to be aware of?

Thanks again!

Have you talked with the people at your local office of the Texas A & M USDA Cooperative Extension Service? They will have much more information about sedges in Texas than I do, but all sedges are bog plants so your soil may be wetter than it appears to you.

Have you tried asking in the Lawn Care forum? Might help with the solarization and bermuda topics.

Get a soil test done - the co-op extension kimmsr mentioned should have kits available.

Post the soil test results in the lawn care forum to get suggestions on how to alter the soil so that it is favorable for bermuda and unfavorable for nutsedge.

If you aren't willing or able to dig up the actual nut, buy sedgehammer online or at a Lesco store (www.lesco.com) if one is close to you. I've heard this is the best product for nutsedge, but I am not sure if it would hinder your plans to hydroseed - at this point it might be better to just nuke the sedge with sedgehammer ... if the bermuda won't grow in the area this year, it will next year.

I would be very careful with the hydroseeding. If you are hiring a company to do it, you better make sure that they are spreading JUST bermuda seed, and don't have any "filler" seed in the mix.

fw-I am helping a friend with her zeroscaped-ish yard and have run into this awful nutgrass. It is growing up through the weed block and recycled glass sand in half of the yard. Our plan was to just dig up 3 inches of dirt all over (a ridiculously daunting task) in hopes to rid it all, but after starting decided to do some more research.

Your plan sounds pretty good, although is all that newspaper and cardboard really more cost/time effective than plastic? From what I've read, after your soil solarization you have to hand weed VERY carefully to make sure you get all the nuts...OR ELSE! Not sure if it's all worth the risk.

I have no idea what we are going to do with friend's yard. We discussed salinating it, or simply including rock salt in the glass sand. I know this can ruin the soil from anything growing in the future, and there are yuccas there now so we would want those to live. I can't believe how awful this stuff is, and we just don't know what to do with it.