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  #1  
Old 05-07-2011, 12:39 AM
smokeyjoe14 smokeyjoe14 is offline
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Join Date: May 2011
Location: Blaine, MN
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Looking for any and all advice on my overseeding plan

Hi all-

I'm planning on overseeding this coming fall and I am looking for any and all thoughts/advice/comments regarding my plan for the best possible results with an overseeding project.

Right now, I've pulled soil samples and am waiting to see the results and make necessary amendments.

Come the end of August/early September:
1. Mow grass short and collect clippings
2. Dethatch
3. Aerate
4. Spread some starter fertilizer
5. Spread seed with a broadcast spreader
6. WATER!

I live in MN and have mostly sandy soil.

Thanks in advance for your help!
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  #2  
Old 05-07-2011, 07:50 AM
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Hineline Hineline is offline
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All sounds good but I would spread "some" seed after you aerate then seed with a slit seeder instead of using a thatcher (it will do the same thing) and cut in seed in two directions. If the lawn is thin to start I would leave enough of the thatch debris to mulch the seed and don't use starter until you see grass germinating and an inch high at least. You don't want to encourage the existing grass to out compete the new seedlings. Don't mow until you see plenty of seed germinate either. The mower might displace the seed from the seedbed.
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Old 05-07-2011, 07:58 AM
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Hineline Hineline is offline
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Just to add, make sure if the soil audit says to lime do it so that it's available to plant. Grass seedlings need plenty of calcium to grow up big and strong!
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  #4  
Old 05-07-2011, 11:20 AM
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lilmarvin4064 lilmarvin4064 is offline
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I agree with Hineline. But don't overthink it too much, it's not that complicated. No need to collect clippings as long as your are mowing when you should and using a mulching blade.

Aerate
overseed
slice-seed or dethatch
overseed
starter

If you really wanted to go crazy, you could apply a growth regulator to the existing grass before seeding.
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  #5  
Old 05-07-2011, 03:28 PM
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Patriot Services Patriot Services is offline
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Slice seeding will give much better results. The seeding much more uniform with less ending up where you don't want it.
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  #6  
Old 05-07-2011, 03:36 PM
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RigglePLC RigglePLC is offline
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I have a different opinion, sorry. Start earlier in Minnesota. Say mid-August. You want soil temperature to be high--as that results in fast germination. Sow seed when temps come down below 85 is ideal. Six weeks before frost for sure. You probably do not need aeration--it does not prepare a seed bed and with sandy soil you have plenty of air. Mow very short. Slit seed. Use top quality seed. If you cannot slit seed --broadcast the seed and power rake to work it into the soil.
However remember that the sod-quality dark green type seeds my leave you with dark green spots.
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  #7  
Old 05-08-2011, 09:35 AM
Smallaxe Smallaxe is online now
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Riggle is correct, in that the seed should be in the ground when its plenty warm... Remember, it is the seedlings that will do better in the cooler evenings, and rainier season...

The other point to address is the "Real Thatch" issue... Planting seed 1/4" deep in 3/4" of real thatch will not do much for you... It is best to learn about Real Thatch and soil contact, before going through with any plan...

Aerating and one size fits all, is for people who can't understand how plants grow... So we overfertilize and overwater and choke out the surface of the soil with real thatch...
Find someone who can identify what your turf is really like and have it corrected by fall.
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Now that I know that clay's texture(platelets) has nothing to do with water infiltration, percolation, or drainage
,,, I wonder what does...
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  #8  
Old 05-14-2011, 09:32 PM
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nightshutter nightshutter is offline
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Quote:
Originally Posted by Hineline View Post
All sounds good but I would spread "some" seed after you aerate then seed with a slit seeder instead of using a thatcher (it will do the same thing) and cut in seed in two directions. If the lawn is thin to start I would leave enough of the thatch debris to mulch the seed and don't use starter until you see grass germinating and an inch high at least. You don't want to encourage the existing grass to out compete the new seedlings. Don't mow until you see plenty of seed germinate either. The mower might displace the seed from the seedbed.

The only access I have to a slit seeder around here is if I pay 6k for one. I have a thatcher. If the lawn has a lot of thatch I would assume thatch first, rake up thatch, top dress, Then over seed/thatch again? I can understand if there little thatch but some places ive been pulling up a lot. Just wondering.
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