T-Zone SE

A four-way broadleaf herbicide built for the tough weeds a standard three-way misses — wild violet, ground ivy (creeping charlie), oxalis, spurge — with a fast visible burn. The extra active, sulfentrazone, is what gives it the speed and the reach into wild violet and sedge that plain 2,4-D/dicamba can't manage.

Maker: PBI/Gordon Corporation
Active: Triclopyr (2-butoxyethyl ester) 7.72% + Sulfentrazone 0.64% + 2,4-D (2-ethylhexyl ester) 29.32% + Dicamba acid 2.22%
MoA group: WSSA Group 4 (2,4-D / triclopyr / dicamba, synthetic auxins) + Group 14 (sulfentrazone, PPO inhibitor)
EPA reg: 2217-1006
Net contents: 2.5 gallons
Coverage: broadleaf turf herbicide
Signal: caution

T-Zone SE label — The shed bottle — T-Zone SE, read straight off the label.

01Usage

What it's for and where it goes.

Targets (label): Wild violet, ground ivy, oxalis, thistles, dandelion, spurge, clover, plantain and many other listed broadleaf weeds. Some nutsedge suppression from the sulfentrazone.
Where: Established cool- and warm-season turf. Post-emergent, on actively-growing weeds.
Speed: Sulfentrazone gives a fast contact "flash" within days; the auxins (2,4-D + triclopyr + dicamba) finish the systemic kill.

02Efficacy

How well it actually works.

The go-to when a three-way stalls on wild violet and ground ivy — the four-active mix is markedly stronger on those.
Fast, satisfying visible response, then full kill over 1–2 weeks. Often a single application on weeds that normally need repeats.

03Best at killing

What it's genuinely strongest on in real use.

The weeds a three-way misses — T-Zone's reason to exist is wild violet, ground ivy (creeping charlie), oxalis and spurge, with fast visible burn. Sulfentrazone (the fourth active) delivers the speed and the reach into wild violet and sedge that plain 2,4-D/dicamba/triclopyr cannot (Purdue Turf, ground ivy control; UMN, creeping charlie management). Often a single app where those weeds normally need repeats.
Overkill for easy dandelion-and-clover jobs — it is the escalation product.

04Dangers

What it can hurt — read this before you reach for it.

Signal word CAUTION.
Ester actives (triclopyr + 2,4-D 2-EH ester) = volatility/drift — vapour can move to nearby trees and gardens in heat; spray cool and calm.
Dicamba is soil-mobile — avoid tree/shrub root zones. Sulfentrazone can injure turf if over-applied, on newly-seeded areas, or on sensitive grasses — follow the rate and seeding intervals exactly.
Toxic to aquatic life; keep from water. Off-target drift kills desirable broadleaves.

05🐾 Dogs & re-entry

Pet safety — toxicity and how long until a dog can be back on it.

🐾 Pet safety — read before you let the dog out

Toxicity: the auxin mix is slightly-to-moderately toxic (2,4-D — dogs more sensitive; dicamba — salivation/muscle spasms; triclopyr — dogs excrete slowly) (NPIC 2,4-D, NPIC Dicamba, NPIC Triclopyr). Sulfentrazone is low oral/dermal toxicity (EPA sulfentrazone fact sheet).
When safe again — sourced: sulfentrazone turf products carry a 12-hour Restricted-Entry Interval and direct that children and pets be kept off until dry (EPA sulfentrazone turf label). With the ester actives and dicamba in the mix, default to fully dry plus 24–48h for dogs.

General guidance. Confirm the label's re-entry interval and ask your vet; when unsure keep dogs off until fully dry.

06Storage

How to keep it, and keep it separate.

Original container, tightly closed, cool/dry, away from children, food, feed.
Keep from freezing. Long shelf life sealed. Verify the EPA reg number and exact percentages against the booklet — read here off the label face.

landscape.gf.cx · chemicals · t-zone-se · filed 2026-07-23 · read off the label — verify every rate against the booklet