Plant Growth Regulators – What Are They? How Are They Used?

Date August 19, 2022


Author TreeNewal Staff

Plant growth regulators, also called plant hormones, are natural chemicals that influence the physiological processes of tree growth and development. Synthetic growth regulators like Cambistat can help plants combat adverse effects of environmental stressors and offer several benefits like promoting healthy development, extending the useful life of trees, and triggering secondary health benefits. In this blog post, we’ll discuss plant growth regulators, their applications, and how Cambistat can improve tree health.

Plant Hormones

The six groups of plant hormones play a unique part in the role of plant growth and development

  • Auxins – elongate plant cells, stimulate root development, initiate plant movement, discern vascular tissue, and trigger flower blooms and buds
  • Cytokinins – promote cell division, help to delay cell aging, and help plants heal from wounds
  • Ethylene – not required for plant growth but affects shoot and root growth, promotes flower death, and fruit ripening
  • Gibberellins – responsible for lengthening stems and flowering processes
  • Growth inhibitors – stop plant growth and promote flowering
  • Growth retardants – slows but doesn’t stop plant growth

How Are Plant Growth Regulators Used?

The first artificial use of plant growth regulators was in the 1930s to stimulate flower production on pineapple plants. Since then, technology has evolved, and now growth regulators are used in various applications, from influencing agricultural crop yield, fruit production, tree care, and more. Professional tree care specialists apply Cambistat to trees by spraying the leaves of the plant or drenching the tree’s base with the liquid. When administered by a tree care expert, a single application can last three years.

How Does Cambistat Plant Growth Regulator Work?

Synthetic growth regulators mimic naturally occurring plant hormones to slow the vegetative growth of trees. Cambistat works by inhibiting auxin production, which slows tree growth and makes controlling the tree more manageable.

Benefits of Plant Growth Regulator

Extend Tree Trimming Cycles

ISA Certified Arborists use Cambistat as the last step of the pruning process as a way to extend trim cycles. It reduces resprouting of trees after trimming so that trees don’t have to be trimmed or pruned as often. This saves tree care costs and extends the usefulness of tree trimming and pruning.

Increase Longevity of Trees

Trees growing in stressful environmental conditions like drought or disease can benefit from Cambistat. By slowing tree growth, Cambistat allows the tree to put more energy into developing disease resistance and can slow the evaporation of water from leaves during times of drought.

Encourage Tree Nutrition by Triggering Secondary Health Benefits

Cambistat can help increase fine root density in trees, which leads to a higher absorption rate of water and nutrients from the soil. This can result in higher chlorophyll production, which leads to healthier, greener leaves. As a secondary benefit, the increase in the plant’s ability to perform photosynthesis can act as a preventative measure against chlorosis.

Reduce Property Damage

When first planted, the size of the full-grown tree is often underestimated. Cambistat can prolong tree growth to allow more time to plan and prevent issues that may impact safety and threaten structures.

Are There Adverse Effects of Cambistat Plant Growth Regulator?

Pesticides that treat or prevent pests can contaminate soil, water, and nearby plants. Excessive use can cause the destruction of biodiversity. Plant growth regulators are a sustainable approach to combating pesticide toxicity. They can combat these adverse effects by acting as chemical messengers under complex regulations that can enable plants to survive under stressful conditions. They mediate the physiological conditions of the plant and can promote plant growth subjected to pesticide-induced stress.

According to a Durham City-Council Environmental Affair Board report, when properly applied by a tree care specialist, the low toxicity and limited soil mobility of Cambistat make it safe and produce minimal adverse toxicological effects.

How Cambistat Growth Regulator Can Help Your Trees

Cambistat plant growth regulator is an effective and sustainable way to increase the lifespan of trees, improve the safety of residential and commercial properties, and promote tree nutrition. If your plants are suffering from insufficient resources, disease, lack of nutrition, or have the potential to harm property and structures, professional application of Cambistat may be able to help. When used properly by an ISA Certified Arborist, a single application of Cambistat can provide growth regulation for three years. Contact us today to learn more about what our tree care experts can do for your plants.


As a sustainable tree care company, our tree care experts use eco-friendly plant growth regulators to promote your landscape’s overall health and natural beauty. Our Certified Arborists know how and when to apply Cambistat to maximize the health benefits for DFW trees. Contact us today to get started.

If you need advice or assistance with tree health, get in touch with an ISA Certified Arborist at TreeNewal and enjoy tailored tree care services.


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