Spreader Settings Subtleties
Here are the basic rules of fertilizer spreader settings -- The GardenLine Way!

First, I don't really have a preference on what spreader you choose. Just make sure it is a "broadcast" spreader rather than a "drop" spreader. Yankee-transplants accustomed to growing Kentucky bluegrass and fescues may still have a drop spreader. You might as well get rid of it, because in Houston you'll need a broadcast spreader. The reason is pretty simple: since St. Augustine is the predominant grass here, you'll only "streak" it green with a "drop" spreader. Plus, using a broadcast spreader will save you gobs of time, cutting your passes by more than half.

If you have you ever read a bag of fertilizer, especially the ones we recommend per my fertilization schedule, you'll discover that most of the spreaders listed don't even exist anymore. Spreader manufacturers keep advancing their products, but fertilizer manufacturers never seem to update their information, much less do new research to verify dosages. So, with the help of various fertilizer experts, I've come up with some practical rules that seem to work very well. There are a couple of exceptions (which I'll get to), but here are the basics:

For fertilizers, put the setting a notch or two above "half way." For example, if there are 20 settings on the spreader 11-12 would be the spot to select.

For pre-emergent herbicides, put the setting on or one notch above "one-quarter." If there are 20 settings on the spreader, 5-6 would work.

Don't over-think the math. I've seen spreaders with as few as 10 settings and as many as 30. The rules apply to all. Don't worry ... you can be off by a notch or two without fear of over-fertilizing.

Some Exceptions to the Rules:

With pre-emergent herbicides, if you think the dosage is too low, then up it a notch or two.

With fertilizers, you don't have to cover every square inch to get good results. So, if you think half open is too much, set to a notch below half.

With advancements in "spreadable composts," it is okay to mete them out using a broadcast spreader open fully.

On hand-held spreaders, if there are 5 or fewer settings, fertilize with a full opening. But LOWER the setting for pre-emergent herbicides ... at least down to 3 — maybe even 2. (If a hand-held spreader has 10 or more settings, apply the general rules above.)

If you have questions, call the GardenLine weekend mornings at 713-212-KTRH (5874) for clarification.



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