The real answer is?

WaltH – posted 02 April 2010 08:20

I live in Central Florida (Brevard) and have a Seville lawn. I know that Seville is a cultivar of St Augustine.As I look for fertilizer / herbicides, the labels will indicate “Safe for St Augustine lawns”.

Is this the same a saying “Safe for “cultivars” of St Augustine”? Or does the vendor really mean “Do NOT use this on anthing but St. Augustine…which means don’t use this on Seville”??

turfgrass – posted 02 April 2010 18:59

As far as straight fertilizer is concerned…it’s just fertilizer. Fertilize accordingly.

Some chemical labels will actually read, “not for use on improved cultivars of St. Augustine”. If it’s pre-emergent activity you’re looking for…atrazine, pendimethalin, prodiamine, dithiopyr should all be safe to use.

Post-emergence is a different story…fairly limited to what you can use. Atrazine and metsulfuron are safe on St. Augustine, and control a wide range of weeds. I’ve never dealt with “Seville” though, but I spray a lot of “Mercedes” and “Palmetto”.