lawn problem

hi, i had a concrete base for a shed that i removed in july and to
soiled over.I then seeded the topsoil with "tuffgrass" as i have little ones, initially it took very well and i had lush green stron grass but now after its last cut the rest of the lawn is long and lus and the square patch of approximately 12ft by 5ft has turned a yellow colour and is growing far slower than the rest of the garden..any idea guys?
-- jellyfish
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jellyfish said:

LOL lemme get this straight...
You just threw some dirt over the top of a big concrete pad, and planted grass on it? My first question has got to be, "WHY?".
My next question would have to be, "Is this a troll?". Because, if it is, you got me good.
IF you're serious...
How deep is the soil? What kind of soil? What kind of setup did you allow for drainage?
Don't you now have a big, square/rectangular "hump" of lawn now? That's GOTTA look more strange than a concrete pad. I have a 16x20' concrete pad in my back yard, that used to have a basketball goal at one end. The goal's been removed, and the pad now holds my shed, and any piles of garden mix and mulch that I buy, until it's ready to be dispersed, a garden trailer, and any limbs that fall from my trees, until they can be disposed of. Sure beats the hell out of having all that stuff sit on my lawn, killing areas. ;)
A concrete pad in your yard can be quite useful. I doubt seriously that you will be able to get lawn to grow there, to your liking. Either remove the pad, and THEN put in a lawn, or learn to live with the pad, and utilize it.
--

Eggs

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lol eggs,,, of course i removed the concrete and removed as much of th
bigger stones as i could and dug down probably 8 inches or so..the used topsoil to level it then seeded and lightly covered wit topsoil..as i said, initially it grew amazing only the last month i seems to be struggling unlike the rest of the lawn Eggs Zachtly Wrote:

-- jellyfish
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jellyfish said:

Ok. *whew* glad it was me. I kinda figured I read it wrong, but I couldn't stop laughing, to read it again. =)
I agree with the Sarge and Jim. Take samples from that area, and test the pH.
--

Eggs

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It needs fertilizer.
Eggs Zachtly wrote:

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kevin crowl wrote:

no. fertilizer without first knowing the pH is not a prudent thing to do under any circumstance.
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I think he meant he "removed" the concrete and then filled in with "top soil".
The concrete probably had been like adding lime to the soil for years.

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Srgnt Billko wrote:

[....]
pH testing.
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I had to chime in on this......
You can do a PH test, but the patch in question is already telling you that something is wrong. Added fertilizer will probably do nothing more, and maybe even kill the young grass.
I had a similar problem - removed a tree, had the stump ground down, and the stump wood chips hauled away. Filled in the depressed area with top soil and seeded with tall fescue. Man! The seed came in beautifully, but 3 weeks later the newly seeded area is looking yellow and discolored. I do not know the chemistry behind this is, but I recognized what was happening - the soil was low in IRON which inhibits the grass plant from taking up nutrients. I went to the local big box hardware store and bought an iron supplement that is applied via hose end sprayer. Made two applications 3 weeks apart and the area greened up REAL NICE! The patch is practically filled in after 2.5 months. Only used 1/3 of the 16oz bottle of liquid iron supplement.
Lou Reyna Virginia Beach, VA
jellyfish wrote:

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