Soil test

Did you do your own or did you send it off to an Ag. Center to have it done?

If to an Ag. Center, they could tell you what you'd need for what you're trying to do, as in lawn, vegetables, fruiting vines and trees, etc.

They'd tell you what you need to do to get your numbers in line with the intended use.

quote:

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Yes, lsu ag. Report suggests aluminum sulfate. Not sure how much, when to add and if necessary if adding a fertilizer in mid April.

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The AgCenter reports on amending soil and fertilizing lawns are not user friendly - geared more to farmers and not homeowners.

Recommending aluminum sulfate to lower soil pH to a optimal level, prob near pH 6.5, for St Augustine, but St Augustine will do fine at your current soil pH - it does for me and I have a similar soil pH as you.

If you want to lower the soil pH it I’d suggest elemental sulfur which acts more slowly, and probably 2 lbs of elemental sulfur per 100 sq ft, spread through the year with, no single application exceeding 1/2 pound of sulfur per 100 sq ft. Read this publication, pay attention to Table 1 and the top footnote below Table 1. Adjusting Soil pH in MS Landscapes .

If you do this, have your soil re-tested next spring.