Hey Everyone. I’m still getting adjusted to the lingo for irrigation, but I’m trying to get there and want to be good at this eventually. I live in Houston where the summer months are ridiculously hot while also having some of the worst soil ever created. Establishing a good root system is already a uphill climb. I purchased a soil probe to determine root depth and have a look at the makeup of this soil. After checking a survey of my area the entire neighborhood is listed as “Urban Land” with no measured data available. The soil has some clay and what I believe to be sand. We have treated the ground countless times with Gypsum in order to break up that clay. I determined that my St Augustine roots were only reaching MAYBE 3 inches. Thats being generous. All the reading I’ve done has indicated that with the roots being so shallow and not penetrating deeper, I should be watering deeper less frequently to promote deeper roots. After doing the catch cup tests and adjusting the inputs for efficiency and root depth, I figured that would be the outcome. Instead my water time for each station went WAY down and set to water 6 days in a row. Not to mention that the soaking that used to take place before my adjustments is now gone. The ground is very hard here in my area. The clay is obvious in the soil by how hard the top layer is. Water tends to soak in slowly. I figured my settings would lead to that too.
This doesn’t make sense to me. The idea that the grass won’t burrow deeper for water if there is always water available at the surface does make sense to me. I think I would need a less frequent, longer watering.
Am I looking at this wrong?