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Trimtect is an innovative formulation of Cambistat for use on shrubs, small trees, and bedding plants. Trimtect consistently reduces the shoot growth of plants by 30-70 percent during the growing season. Sprayed on the foliage, Trimtect is the newest generation of growth regulators formulated specifically for shrubs, flowers, and other landscape plants to maintain a manicured appearance with less maintenance.

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Trimtect Starter Kit
Buy the Trimtect Starter Kit

In stock

Application: Foliar Spray

SKU: 3105
Active Ingredient

Paclobutrazol 8%

EPA Signal Word


Unit Size

1 Gallon

Unit Per Case


  • Foliar Spray

    Spraying is traditionally seen as the first line of defense for the PHC practitioner, however, these days it is also the most controversial.

    Spraying can be applied to the leaves or to the woody (trunk and limbs) parts of the plant.  The benefits of a spray program are fast efficacy (often spray insecticide formulations are “knock-downs”) and low product cost as they are diluted in large volumes of water.  For some foliar fungal diseases spraying may be the only option for control.

    The downsides of sprays include effects on non-target species, high equipment cost for modern spray rigs, drift and applicator exposure, difficulties of reaching high canopies, short residual, and, as mentioned, the increasingly controversial nature of spraying.

    New laws and ordinances are restricting the use of spray on trees in urban areas as well heightened public sentiment against spray applications. That said, if sprays are used judiciously they still have a place in the PHC toolbox.

  • Soil Application

    Systemic products applied to the soil are amongst the most operationally efficient option for the practitioner.

    These can be applied at the base of the tree, either by pouring a basal drench solution around the tree or by using soil injection equipment. To the tree these methods are indifferent; the difference is to the applicator. If one is treating several trees at site with the same product soil injection may be faster whereas one or two trees may be faster to treat with basal drench.

    Many practitioners will employ a dripline or grid pattern application under the tree but research has shown basal applications to be as effective or better and is markedly easier to apply. The upsides of soil applications are that they are easy to apply with no chemical drift and they have a wide application window. Wounding the tree is not necessary and you get long lasting residual with most chemistries. The downsides of soil application are that they cannot be used in areas of high water tables and you need planning: most soil applied systemic products take weeks to months to reach the canopies of large trees.

    Soil applications are ideal for preventative treatments in the fall or spring but may not be the best option for the client that calls in midsummer with insects feeding on their tree right now. In that case you can use one of the other treatment options and then set them up on a preventative treatment schedule for the future.

Comprehensive Trimtect Training Is Available!

Trimtect Training

Proper training of applicators and account managers is critical for ensuring success. RTSA is capable of providing training materials, hands- on application training, and other necessary educational material to train staff for success.

Contact your Territory Arborist or the Solution Center to schedule training for your crews.


Controlling the growth of shrubs (Lawn and Landscape Magazine)
Patrick Anderson, 5/11/2016, ~60 min

Science and Uses for Shrub Growth Regulators
Shawn Bernick, 3/10/2015, ~1 hour

Growth Management Tools to Help Trees
Jeff Picher, 5/27/2015, ~45 min

Technical Support:

  • In–field application training
  • Online training
  • Diagnostic training
  • Live phone support from ISA certified arborists
  • Regional technical representatives

Solution Center: 1-877-272-6747