When are you applying your pre emergent?

Barricade (prodiamine) when the soil temperature drops into the low 70's for a few days in a row. Houston area with Bermuda.

Used Barricade for the first time this spring and was very pleased. Only had one problem section with some spotted spurge that I knocked out quickly.

What chemical/product is recommended for St. Aug?

This week or next will be a good time to put it down in your area. I’ll be using prodiamine (spray) for the first time - been using Dimension granular heretofore (no issues), thought I’d save a few $$$. I’ll follow it up with a Simazine pre-emergent application in early/mid November.

For the spring application I’ll likely use Dimension granular in my front yard (prodiamine in back and side yards) where a few years ago I had a crabgrass problem but for all practical purposes eliminated it with Dimension. Not that prodiamine doesn’t control crabgrass, it does, but Dimension does have some post-emergent control on young crabgrass, if you miss a window of application, which prodiamine does not.

Put down prodiamine about a week ago. Neil Sperry says first week in Sept is the best time for DFW area.

Prodiamine... When the 5-day avg soil temp hits 70 deg, so probably early-mid Oct (for my area)

Soil Temp Map

For St Aug and centipede in the fall I like simazine. For bermuda I like Specticle. Follow the link that meeple posted with soil temperatures.

October. I put out Prodiamine last fall and Dimension in the spring. Dimension worked MUCH better than prodiamine for me. I'll be sticking with that based on my experiences and the fact that Ace hardware has it pretty cheap.

quote:

---

What chemical/product is recommended for St. Aug?

---

All the pre-emergents recommended on this board - prodiamine (Barricade), dithiopyr (Dimension), Specticle, Simazine and others - are suitable for use on St Augustine, Centipede, Bermudagrass and Zoysia, all have some + and -.

Prodiamine in spray form is the cheapest, but very effective, of your options. It’s available as granular also. For average residential lawn, Dimension in granular form is for all practical purposes your only option - spray version is available but only for larger areas and somewhat expensive. Specticle is expensive, as spray or granular, and maybe the most effective of them all as can control some weeds, Doveweed for example, that the other pre-emergent herbicides are largely ineffective against.

You have any particular winter weed(s) that is more problematic than others that you need/want to control?

quote:

---

I'm in Lafayette area as well and was using Sunniland Preemergent which had same active ingredient as Dimension. It worked great on my yard. It appears Lowe's no longer carries this so I am looking around as well for another granular option. I'm monitoring soil temps based on the link in one of the above posts.

---

You’ll probably be able to find this at retail plant nurseries, maybe feed and seed and hardware stores in the Lafayette area LINK. Don’t know how it will compare in cost to the Sunniland Dimension but I used it for a couple years with great success before I discovered the LESCO Dimension 0-0-7 at Site One Landscape Supply in Baton Rouge at a much cheaper price.

Im in Houston and have St Aug, had a little difficulty this year more so than normal with the little clover weed.

Curious what I should do to get rid of that as well as prevent it for next year?