Frequently Asked Questions

A TGR or Tree Growth Regulator is used to slow down the top growth of plants whilst encouraging fine root growth, thicker, healthier, and darker foliage to help defend against disease.

Your Council or power provider will nominate trees to be included in the tree growth management program. A notification will be placed in the letterboxes of the properties adjacent to the trees being treated 2 – 3 weeks prior to works being commenced If you have received a notification from us, we will be treating the trees in your area that are adjacent to powerlines.

Your tree(s) will generally be treated 2 – 3 weeks after your notification letter was received.

The treatment is applied through soil injection, 5 to 15 cm beneath the ground, around the base of the tree. The active ingredient, Paclobutrazol binds to soil particles and has limited mobility in all soil types. When applied by a licenced professional in accordance with the label it poses minimal exposure to people, pets, wildlife, and water sources.

Re-application is recommended approximately every three years, though beneficial effects on some tree species may last extend to 5+ years.

Paclobutrazol is a proven tree growth management product that has been used by tree care professionals, power providers, universities, and agriculture for decades. It reduces tree growth, thereby decreasing the amount of pruning needed. It also enhances the health and appearance of the tree and in the following 2nd & 3rd years the results will be more even more noticeable.

There is no cost to you directly as the homeowner or occupier, this is part of your Council or power providers vegetation management program.

• The active ingredient Paclobutrazol is a proven tree growth management product that has been used by tree care professionals, landscape companies, and in agriculture for decades. It slows tree growth, thereby decreasing the amount of pruning needed. It also enhances the health and appearance of the tree.
• The Arbor Scientific Method is the ideal solution to managing powerline easement trees in the urban forest, made for power providing companies and their customers.

No, when the paclobutrazol is applied in accordance with the label by a licenced professional there are many documented benefits. The first noticeable reaction to the treatment is an increase in chlorophyll production which will create darker green leaves. As time goes on the tree will increase in health and you will notice the reduction in growth causing a more compact and healthier tree.

Paclobutrazol is highly specific to the process found in plants. Research shows that there is minimal risk to people, pets and wildlife when applied according to the label by a licensed professional.

The growth of surrounding grass, shrubs, flowers, and other vegetation may be slowed if the roots of these plants are growing in the area we treated near the base of the tree.

The active ingredient Paclobutrazol has completed extensive testing to ensure its efficacy and safety. It has been shown to have limited mobility in all soil types, which means its potential to filter through the soil to reach ground water is minimal.

Yes. The leaves collected from trees that have undergone treatment can be used for mulch, compost or collected for disposal.

Our product is proven to be effective on between 80% – 85% of the species in any certain geographic area. The trees we did not treat are species that the product will not effect.

You will need to contact your local arborist company or go to the Contact us section of this site. You can also email info@arborscientific.com.au to request direct contact from our arboriculture team.

The use of Paclobutrazol will not replace trimming completely but has proven to efficiently reduce the frequency of pruning.

Yes, the use of Tree Growth Regulators on your nature strip is completely voluntary. Go to the Contact Us section of this site to opt-out or to request a call from our team of experts who will be happy to answer your questions.