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Eight weeks ago new rye-blue grass was professionally installed. The workers followed all the directions re: soil amendments, rototill, leveling, etc. It looked fine until after mowing >6 weeks after install. The sod was authentic and came directly and freshly from a well-known sod grower.

• 1. Large geographic patches of lighter green grass. See picture
• 2. Those lighter areas have grass which looks abnormal. It often has a vertical blade with horizontal off shoot blades. See picture.

Why is this happening with new sod?

Are these normal grass blades?

What would you do now to correct his situation and get uniform color?

Could this be under or over-watering?

Soil test is a must. You don't just drop sod and expect an instant yard.

Root system looks fabulous at 6+ weeks. People like me with hard clay are envious.

slomo said:

Soil test is a must. You don't just drop sod and expect an instant yard.

Root system looks fabulous at 6+ weeks. People like me with hard clay are envious.

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Soil test normal / good. Are these specimens normal grass?

They don't look like rye to me. Maybe they are.

Did you smoke off the old lawn prior to laying the sod?

Yes, RoundUp®.

How does the KEY installed??? Does the curved part go in the shaft or into the collar?

Depending on the grass type, might take 2-3 sprays to eliminate your old grass type. Bermuda is one. This could be your old grass coming up you are seeing??? What flavor of grass did you kill off?

MowerMark said:

How does the KEY installed??? Does the curved part go in the shaft or into the collar?

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What are you talking about?

slomo said:

What are you talking about?

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Oooops! Wrong thread. This was a meant for. engine repair. The KEY is a small piece of metal which fits in slots (shaft and blade holder)

MowerMark said:

Eight weeks ago new rye-blue grass was professionally installed. The workers followed all the directions re: soil amendments, rototill, leveling, etc. It looked fine until after mowing >6 weeks after install. The sod was authentic and came directly and freshly from a well-known sod grower.

• 1. Large geographic patches of lighter green grass. See picture
• 2. Those lighter areas have grass which looks abnormal. It often has a vertical blade with horizontal off shoot blades. See picture.

Click to expand...

ANALYSIS / ANSWER =. https://golfcourselawn.store/blogs/...id-of-poa-annua-annual-bluegrass-in-your-lawn

POA is lovely..... LOL Not. Bout like Goosegrass and yellow sedge to name 2.

I can kill the sedge in my yard. It will come right back. Guessing the rootball is not getting any herbicide.

A Professor of Agriculture/Grasses/Weeds said the new sod must be removed immediately and new sod laid. I will not need to pay anything. He also said RoundUp not needed since spores have not yet formed, Wonder how the sod company will make certain this will not happen again.

Off topic: This is the key I don't know which direction it gets inserted: https://www.amazon.com/dp/B008I6Y414?ref=ppx_yo2ov_dt_b_fed_asin_title

It looks like nut grass and common Bermuda.

Final determination =. Annual Bluegrass growing in bluegrass- rye sod.

MowerMark said:

A Professor of Agriculture/Grasses/Weeds said the new sod must be removed immediately and new sod laid. I will not need to pay anything. He also said RoundUp not needed since spores have not yet formed, Wonder how the sod company will make certain this will not happen again.

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New blue-rye sod was installed yesterday, OMG-- it has many clumps as in the photo. Anyone know what it is? Blades go in all directions. Will it overtake the lawn?

do you have two threads on this going?