What's the right setting for a Scott's "SpeedyGreen" rotary spreader for spreading 24 Hour grubkillerplus(I)? I'm killing white grubs.

16-4-8 plus Iron 6 lbs./1,000 sq.ft. Setting 18
Same type spreader

https://blog.supersod.com/yellow-spreader

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You can safely use the recommened settings for the SpeedyGreen in your Scotts Basic Spreader.
Hilary @Scotts

If the product you are planning to apply has a spreader setting for a Scotts SpeedyGreen, or specifially for the SpeedyGreen 3000; you can use that recommendation in your Scotts EdgeGuard DLX . If they do not have a suggested spreader setting for the SpeedyGreen or SpeedyGreen 3000, then this question would best be answered by calling Scotts directly at 1-800-543-8873. One of our associates would be happy to assist you further.

I was just told by Scott's phone customer service (800-543-8873) that their TurfBuilder EdgeGuard mini can use the same settings as their "SpeedyGreen" broadcast spreader, if your fertilizer lists that one.

If the product you are planning on applying has a spreader setting for a Scotts SpeedyGreen, or specifically for the SpeedyGreen 3000; you can that recommendation in your Edgeguard Deluxe Spreader. If they do not have a suggested spreader setting for the SpeedyGreen, or SpeedyGreen 3000 settings then this question would best be answered by calling Scotts directly @ 1-800-543-8873. One of our associates would be happy to assist you further.

If the product you are planning on applying has a spreader setting for a Scotts SpeedyGreen, or specifically for the SpeedyGreen 3000; you can that recommendation in your Edgeguard Deluxe Spreader. If they do not have a suggested spreader setting for the SpeedyGreen, or SpeedyGreen 3000 settings then this question would best be answered by calling Scotts directly @ 1-800-543-8873. One of our associates would be happy to assist you further.

We do have a general rule, called the 50 by 20 rule which will allow you to use any product in any spreader, but there is some work that will need to be done.

* Weigh out and Place enough material in the hopper to cover 1,000 sq. ft. (In your case 2.3 pounds)

* Place the spreader setting on a low setting (Usually one-fourth of the spreader setting range or less. In your case i would suggest about 2.75 or 3)

* Spread the material over a 50 x 20 ft. area (This is 1,000 sq. ft.).

* If material is left over, you will need to increase the setting accordingly

* If they you up short, you will need to decrease the setting.

Your SpeedyGreen 2000 Rotary Spreader spreader was calibrated at the factory. However, a spreader's calibration may change or slip during periods of frequent or heavy use.
You may check the calibration by using the following directions. First, adjust your micrometer setting to 2. Squeeze the trigger against the handle. The calibration line is a small, raised line embossed on the top of the spreader's shut-off plate. With the micrometer set at 2 and the trigger squeezed against the handle, the calibration line should be aligned with the back edge of the hopper opening.
To adjust the alignment, use a small wrench to turn the black calibration screw at the lower end of the control wire leading from the micrometer rate setting barrel. Adjust the screw until the calibration line and back edge of the hopper meet. If you have any difficulty checking the calibration, contact us and we will be happy to help walk you through the adjustment.
When you are not pulling on the trigger handle, the cable should be loose. When you pull on the handle, the cable becomes taut and the shutoff plate slides open.
If you have any additional questions feel free to contact Scotts directly @ 1-800-543-8873

I have the same question, but have not found a direct answer. I have calculated an estimate setting of 4 or 5 for the speedygreen 2000. The Milky Spore is very simular to the fertilizer that I use. Milky spore says that 1lb covers a little over 300 square feet. My fertilizer says that at a setting of 4 it is spreading 2.6 lb per 1000 square feet (almost 3 lb per 1000 sq ft or 1 lb per 333 sq ft).
Now I may be totally off, but just bought the Milky Spore today and will apply tomorrow. I may look some more tonight to see if I can find an answer. I felt it was kind of bad that the back of the Milky Spore suggested only using a drop spreader!?

CYCLONE ROTARY
2.0
EARTHWAY ROTARY
6.0
EV-N-SPREAD
6.0
K-GRO ROTARY
.75
ORTHO ROTARY
.75
PRECISION ROTARY SB50
1.50
RED DEVIL ROTARY
1.50
REPUBLIC EZ ROATRY
.75
SCOTTS SPEEDYGREEN 1000,2000,3000
2.12
SCOTTS BASIC BROADCAST
2.12
SCOTTS EDGEGUARD BROADCAST
2.12
SEARS ROTARY
.75
TRUE TEMPER ROTARY
1.5
VIGORO ROTARY
1.50
SCOTTS STANDARD ROTARY
2.12
CRAFTSMAN
6.0
SCOTT’S EASY GREEN
25
SCOTT’S HANDYGREEN
3
__________________________________________

Drop Spreaders:

K-GRO DROP
2.25
ORTHO DROP
2.25
REPUBLIC EZ DROP
2.25
SCOTTS ACCUGREEN 1000
3.0
SCOTTS ACCUGREEN 2000
3.0
SCOTTS ACCUGREEN 3000
3.0
SCOTTS DROP PF1, PF2, PF3, PF4
3.0
SEARS DROP 2.25

If the wheels turn( that is you can push the spreader easily) but the vertical shaft that spins the broadcasting plate doesn't, seems like the gears connecting the axle to that vertical shaft are worn; but if the wheels just slide along the gropund without turning then it would seem something right under the bin is keeping the verical shaft from turning. But I'm NOT an expert; I'm looking for an answer myself,