Hermilio from Illinois writes
We do not recommend applying herbcides at the same time as a turf growth regulator such as T-Nex because this may put too much stress on the turfgrass at one time. Per the product label: "Because some herbicides can injure turf, test tank mixes with Quali-Pro T-Nex on a small scale before widespread use. See the directions for testing in the TANK MIX COMPATIBILITY TEST section."
TZone Herbicide, in particular, already has multiple active ingredients that can be pretty harsh on the turfgrass, so we would not apply these products together unless you have first tested a small area for compatibility and turf tolerance.
Answer last updated on: 05/12/2021