Trimmit Growth Regulator (Hedges & Ornamentals)

Trimmit Growth Regulator is used for controlling growth in ornamental & hedging plants.

Trimmit improves the appearance of hedges while reducing labour costs, helping you maintain your plants in shape for less. Using Trimmit results in not only denser, greener hedges that remain beautifully uniform for longer but also healthier plants that can better withstand drought and other high-stress conditions.

Active Ingredient: Paclobutrazol 250g/L

Click For Technical Info & Tips For Use

5 out of 5 (1 customers reviews)

Quantity	Discount	Status
2 or more	$45.00 each	Available

Size

Free & Fast Shipping

Description

Trimmit Growth Regulator is for the control of growth in ornamental & hedging plants.

Active Ingredient: Paclobutrazol 250g/L

Trimmit improves the appearance of hedges while cutting down labour costs, helping you keep your plants in shape for less.

Recent trials demonstrated that a single application of Trimmit Growth Regulator reduces hedge regrowth by up to 90% leaving you with hedges that require less maintenance. This is due to the regulator’s innovative mode of action, an early gibberellic acid inhibitor that suppresses the growth of terminal shoots for up to 12 months while encouraging the plant’s axillary buds to grow. The result is not only denser, greener hedges that remain beautifully uniform for longer, but also healthier plants that can better withstand drought and other high-stress conditions.

Why choose Trimmit Growth Regulator:

Contains the active ingredient Paclobutrazol.
Better-looking hedges.
Improved drought tolerance.
Improves hedge uniformity.
Reduction in required labour.
Less green waste for disposal.
Deeper, greener colour.
Economic application rates.
100mL of Trimmit will treat up to 200 plants when mixed at a low rate.
Fewer HSE requirements, eg, traffic control, ladders, trimmers.
Backed by the proven reliability of Syngenta Turf.

What species can Trimmit Growth Regulator be used on?

Golden Duranta (Duranta repens)
Small leaf Photinia (Photinia glabra)
Syzygium (Syzygiumaustrale, Syzygium smithii)
Box (Buxus microphylla)
Viburnum
Viburnum spp
Mock Orange (Murraya paniculata)
Star Jasmine (Trachelospermum jasminoides)

Trimmit Growth Regulator is a systemic growth regulator that reduces internode lengths of new shoots and causes the earlier formation of terminal buds. The use of Trimmit should begin only when plants are nearing their optimum size, that is, once the desired shape (height, width and foliar density) has already been achieved and the plant requires only maintenance thereafter. Responsiveness to this product can vary from site to site.

The active ingredient used in Trimmit Growth Regulator is Paclobutrazol (PBZ), which is a plant growth retardant and triazole fungicide. It is a known antagonist of the plant hormone gibberellin. It acts by inhibiting gibberellin biosynthesis, reducing internodal growth to give stouter stems & increasing root growth.

Pack Size: 100mL
Registrant: Syngenta Australia Pty Ltd (APVMA #: 82071)

Specialist Sales Trimmit Growth Regulator Footer

Turf & Domestic Growth Regulators

Features & Benefits

Contains the active ingredient Paclobutrazol.
Better-looking hedges.
Improved drought tolerance.
Improves hedge uniformity.
Reduction in required labour.
Less green waste for disposal.
Fewer HSE requirements, eg, traffic control, ladders, trimmers.
Deeper, greener colour.
Economic application rates.
100mL of Trimmit will treat up to 200 plants when mixed at a low rate.
Backed by the proven reliability of Syngenta Turf.

Share your thoughts!

5 out of 5 stars

1 review

5		1
4		0
3		0
2		0
1		0

Let us know what you think...

Leave a Review

What others are saying

Rated 5 out of 5
Trimmit

Bronwyn (verified owner)
February 4, 2022

Good product fast delivery

Upvote if this was helpful (0) Downvote if this was not helpful (0) Watch Unwatch Flag for removal

Something wrong with this post? Thanks for letting us know. If you can point us in the right direction...

This post was...

Welcome back

Existing account holders please login below via Email or Google Account or Click here to register your NEW FREE ACCOUNT.

Already Registered? Sign in with your email

Email Address *

Password *

Remember me

Forgot Password?

Continue with Google

Register for an account

Email address *

Password *

I have read & accept the privacy policy

Continue with Google

Secure Checkout

You can shop with Specialist Sales online store with confidence. We have partnered with PayPal, Master and Visa Card which is provided by Braintree. Braintree payment technology accepts credit cards and electronic payments safely and securely for our customers.

Braintree transactions are processed using the 3D Secure framework to ensure your sensitive customer information and credit card processing is safe and secure. Similarly, PayPal also provides comprehensive buyer protection for your peace of mind.

Your information is safe

Specialist Sales adheres to strict industry standards for payment processing, using industry leading security protection measures including 128-bit Secure Sockets Layer (SSL) technology for secure Internet Protocol (IP) transactions, and compliance with the Payment Card Industry Data Security Standard (PCI DSS).

Continue as a Guest

Directions Of Use

For Trimmit Growth Regulator directions for use, click here

Situation: Hedging Species

Golden Duranta (Duranta repens)
Small leaf Photinia (Photinia glabra)
Syzygium (Syzygiumaustrale, Syzygium smithii)
Box (Buxus microphylla)
Viburnum
Viburnum spp

Application: Root Drench

Rate: 1.5 to 2.5mL in 1-Litre water per plant

Situation: Hedging Species

Mock Orange (Murraya paniculata)

Application: Root Drench

Rate: 0.5 to 1.5mL in 1-Litre water per plant

Situation: Ground cover species

Star Jasmine (Trachelospermum jasminoides)

Application: Root Drench

Rate: 1.5 to 2.5mL in 1-Litre water per plant

Critical Comments:

Make applications in late winter to early spring, ideally at the commencement of a new season’s flush of growth.
Applications must cover the root system adjacent to the stem at ground level.
Remove mulch to ensure the application reaches the soil.
Light post-application irrigation is recommended.
Do not apply to hedges less than 0.3 m or greater than 2 m in height
It is critical that the apical growing points of the hedging plant be intact to act as sinks, drawing the product into the plant at the time of application.
Therefore, do not prune until 4 to 6 weeks after application.
Do not allow plants to experience drought stress just prior to or just after application.
Do not make a repeat treatment within the following 12 months.
Do not apply to newly planted or recently transplanted plants.
It is strongly recommended that the lower label rates be used when applying for the first time.
The higher rate can be used in the following years when the responsiveness is established.

Application: Root drench:

Uptake of Trimmit is most efficient when it is applied to the soil that receives adequate water and where there is a high density of feeder roots.

Apply the required amount of Trimmit in 1 L of water per plant.
Ensure all treated plants are lightly irrigated following treatment under dry conditions.
Individual trees or plants that are smaller than average should be left untreated or given a proportionally smaller dose of Trimmit.
Apply Trimmit as a root drench for consistent uptake.
Apply the required amount of Trimmit in 1 L of water per plant
Use on plants when they are close to their optimum size, i.e. once the desired shape, height, width and foliar density has been achieved
Use the lower rate when applying for the first time.
If increased regulation is required, step up to the higher rate in the second year.
Rates start at 0.5 mL/plant to 2.5 mL/plant

Rates are a general guide only. Before opening, carefully read Trimmit Growth Regulator directions for use, precautionary and protection statements, storage and disposal, safety directions and first aid instructions.

Questions and answers from customers

I have a lot of Leyland green cypress hedge. Would Trimmit Growth Regulator be suitable to slow it down a bit?

Q I have a lot of Leyland green cypress hedge. Would Trimmit Growth Regulator be suitable to slow i...... Read more
Asked by Tony on August 4, 2025 11:32 am

A
Trimmit Growth Regulator does not list Leyland Cypress (Cupressocyparis leylandii) as a species it can be used on. As Paclobutrazol inhibits gibberellin biosynthesis to reduce internodal growth, give stouter stems, and increase root growth in a variety of different hedging plants, it might be worth a trial 'off-label' at your own risk. We recommend speaking with Syngenta Australia on 1800 022 035 as they may be aware of 'off-label' uses on Leyland Cypress (Cupressocyparis leylandii).

Can Trimmit Growth Regulator be used as a foliage spray on Japanese box hedges? If so, how long does it last, and how often can I spray? Does it go into the entire plant ( systemic), or does it only work on leaves that have been sprayed?

Q Can Trimmit Growth Regulator be used as a foliage spray on Japanese box hedges? If so, how long d...... Read more
Asked by Elizabeth on October 15, 2024 3:05 am

Answered by the admin
Trimmit Growth Regulator was discontinued by Syngenta in 2023. A similar product is Kult Plant Growth Regulator (Paclobutrazol).

Trimmit Growth Regulator application should be repeated after 12 months if growth resumes. Japanese Box (Buxus microphylla) is on label for Trimmit however it is required to be applied as a root drench rather than foliar spray. Per the label, this means applications must cover the root system adjacent to the stem at ground level. There are a number of considerations which must be observed, please ensure you read the SDS and Label prior to purchase and use to confirm suitability for your situation. These are available under 'SDS and Technical' on the product page on our website.

I have a big hedge of viburnums around 20. Is the recommended dose of Trimmit Growth Regulator with 1L of water enough, or do the larger plants get a higher volume? Do you pour the mixture at the trunk/root ball?

Q I have a big hedge of viburnums around 20. Is the recommended dose of Trimmit Growth Regulator wi...... Read more
Asked by BA on December 2, 2022 7:47 am

Answered by the admin
The Trimmit Growth Regulator is only recommended to be applied to hedges between 0.3m and 2m in height. 1.5mL/1L for first-time applications and up to 2.5mL/1L is recommended for applications in following years. The 1L of the mix is applied as a soil drench to the area of soil that covers the Viburnum root system. Light irrigation of the soil after application will assist leach the chemical into the soil so the roots will draw it into the plant.

Can Trimmit Growth Regulator be used on a Morraya hedge?

Q Can Trimmit Growth Regulator be used on a Morraya hedge?
Asked by Garry on August 11, 2022 9:52 am

Answered by the admin
Trimmit Growth Regulator is registered for use on Mock Orange (Murraya paniculata) Hedges.

I work as a horticulturist at a life style resort and i am interested in this for use on Syzygium hedges could you tell me application rate (amount and fequency) cost and safety . thanks

Q I work as a horticulturist at a life style resort and i am interested in this for use on Syzygium...... Read more
Asked by phillip ford on April 2, 2022 4:09 pm

Answered by the admin
The use of the Trimmit Growth Regulator on Syzygium (Syzygiumaustrale, Syzygium smithii) to regulate growth is a popular option. Applications are recommended to be made from late winter to early spring, ideally at the commencement of a new season flush of growth. The application is via a root drench at 1.5mL to 2.5mL in 1L water per plant. You should not apply repeat applications within the following 12 months.

All instructions for use and application are listed on the product's directions for use label, available on the Specialist Sales website in the 'SDS & Technical' tab for each product. There are critical comments regarding the application that need to be understood and adhered to before application.

How effective will Trimmit Growth Regulator be on Lomandra Longifolia and Lomandra sp. lime tuff and Poa Labillardieri? If effective can they be treated after they have been pruned in the winter months?

Q How effective will Trimmit Growth Regulator be on Lomandra Longifolia and Lomandra sp. lime tuff ...... Read more
Asked by Bill Daunt on March 16, 2022 2:18 pm

Answered by the admin
Trimmit Growth Regulator does not include Lomandra Longifolia or Poa Labillardieri as part of its registration of host plants controlled, so we can't guarantee effectiveness on these species. Paclobutrazol is used as a growth regulator in many other products, but these are usually limited to trees and similar broadleaf species. As Paclobutrazol inhibits gibberellin biosynthesis to reduce internodial growth, give stouter stems, and increase root growth, it might be worth a trial 'off-label' in an inconspicuous trial area. We recommend speaking with Syngenta Australia on 1800 022 035 as they may be aware of 'off label' uses on Lomandra Longifolia & Poa Labillardieri. The application of Trimmit is recommended in late winter to early spring, ideally at the commencement of a new season flush of growth.

Disclaimer: This information and product advice is not intended to be advice or recommendations for any specific use or circumstance. You should seek specialist advice before using any product. Always follow the manufacturer’s guidelines. Specialist Sales liability is limited.

Host & Pest

Host	Pest
Host & Pest
Golden Duranta, Japanese Box, Mock Orange, Small Leaf Photinia, Star Jasmine, Syzgium, Viburnum & Viburnum Spp	Control Growth In Hedging Plants

Tips For Use

For Trimmit Growth Regulator FAQ – Click Here

Trimmit is a systemic growth regulator that reduces internode lengths of new shoots and causes the earlier formation of terminal buds.
Use of Trimmit should begin only when plants are nearing their optimum size, that is, once the desired shape (height, width and foliar density) has already been achieved and the plant requires only maintenance thereafter.
Responsiveness to this product can vary from site to site.
It is strongly recommended that the lower rate be used when applying for the first time.
If increased regulation is required, then step up to the higher rate in the second year.
If a plant is under stress, Trimmit should not be used.
Stress can be caused by moisture shortage due to lack of rain or inadequate irrigation, high temperature, salinity, moisture excess due to water table, flooding or inappropriate irrigation, severe or successive frosts, poor fertility caused by an imbalance of major or minor nutrients, diseases, insects, inappropriate herbicide use, or mechanical damage.

Management:

Do not prune the hedging plant for 4 to 6 weeks after application.
Treated hedges should be kept well-watered with adequate nutrition.
Apply a repeat treatment after 12 months only when growth resumes
Plants should not have their nutrition limited due to a lower growth rate.
When replanting, at least 2 years should have elapsed since the last application of Trimmit. Alternatively, if planting into an area that has historically been treated, fresh soil should be provided to allow plant establishment and growth.
A further alternative is to avoid original planting holes and place young plants as far as practicable from the treated soil (minimum 1.5 m).

Mixing

Mix the required volume of Trimmit with the recommended volume of water.
Maintain agitation to prevent settling.

Retreatment

In some cases, control of growth may persist for more than 1 year.
Retreat plants only when normal growth resumes.
Only retreat in the late winter or spring that follows the resumption of normal growth.
Use the interval between the first treatment and the resumption of normal growth as a guide for retreatment in subsequent seasons.

Compatibility

The compatibility of Trimmit with other products has not been established.
Always conduct a physical compatibility test and check for plant safety on a sample plant before making broader applications of mixes to hedging species.

Restraints:

Do not use on plants of low vigour or under stress (see General Instructions).
Do not apply to newly planted or recently transplanted hedging species or ground cover species; allow them to establish and consolidate before applying for the first time.

Storage:

Store in the closed, original container in a cool, well-ventilated area.
Do not store for prolonged periods in direct sunlight.

Safety Directions:

Avoid contact with the eyes and skin.
After use and before eating, drinking or smoking, wash hands, arms and face thoroughly with soap and water.

First Aid:

If poisoning occurs, contact a doctor or the Poisons Information Centre. Phone Australia 131 126.
For further information, refer to the Safety Data Sheet (SDS).

Withholding Period

Withholding period details (WHP):

Not applicable when used as directed.

SDS & Technical

Trimmit Growth Regulator Label (APVMA)	Download Pdf
Trimmit Growth Regulator Label	Download Pdf
Trimmit Growth Regulator SDS	Download Pdf
Trimmit Growth Regulator Brochure	Download Pdf
Trimmit Growth Regulator FAQ	Download Pdf