re: Post weed cocktail question

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Chastant’s in Lafayette didn’t have 0-45-0 so this is what I got. I’m assuming I can still follow Craw’s instructions, and a little extra nitrogen won’t hurt?

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Also, how do you measure weight of fertilizer? Is there a volume conversion? I mean I have a little food scale that I can maybe use. ETA: just measured front lawn and it’s about 1,150 sq. Ft.

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Last question first. 2 cups of a granular fertilizer will usually weighs 1 pound. Just use your food scale to verify, and if it checks out, then use a volume container to measure out what you need. It’s what I do.

On the 18-46-0 that is fine but this is what I’d do. The 1 pound of that fertilizer will provide the recommended P specified from the soil test recommendation (1/3 of it) but also 0.18 lbs of Nitrogen, so rather than applying 3 lbs per 1000 sq ft of Scotts 32-0-10, I’d reduce that application to 2.5 lbs per 1000 sq ft and that’s going to provide you the 1 lb of N per 1000 sq ft (very close to it) recommended for St Aug.

Spreader settings, every one seems to manufacturer fertilizer in different granule sizes. Whatever setting is recommended on the Scotts spreader I’d consider using a lower setting (accept for the Scotts fertilizer) and make as many passes it takes to dispense it, and then in the future adjust it upward accordingly if needed. You have a small lawn so it won’t take to much additional time if you have to make more passes. Main thing is you don’t want to run out of fertilizer in the spreader before you’ve dispensed it over the entire lawn.

BTW, I just wanted to clarify the splitting the of the P and K into 3 top dressings instead of a single application. That is a recommendation provided by the LSU AgCenter turf extension specialists and I’ll quote verbatim from my own lawn soil test analysis: “If values of P or K read low or very low, split the application into two or three topdressings adding these nutrients in April, June and/or August.” I provided a suggestion of splitting 3 ways to coincide with 3 application of regular lawn fertilizer so your fertilizer applications would all conincide.

One last tip, you’ll have open bags of fertilizer for your future applications. Seal the open fertilizer bags good after you finish and I like to store them in a plastic garbage can with a good lid that seals tight - keeps the moisture out and prevents the fertilizer from clumping while in storage. A lesson from the school of hard knocks.