Chlormequat Chloride

Last updated: November 18, 2021

What Does Chlormequat Chloride Mean?

Known as the first plant growth retardant to be used on plants, Chlormequat Chloride was first discovered by chemistry professor Dr. N.e. Tolbert at Michigan State University in the late 1950s. Dr. Tolbert first experimented with wheat crops, to which he applied Chlormequat Chloride. His experiments resulted in thicker stems and shorter plants.

Nowadays, Chlormequat Chloride is commonly used in nurseries to slow down stem growth while encouraging flowering in ornamental plants and flowers.

In addition to Chlormequat Chloride, Paclobutrazol and Daminozide are similar plant growth regulators (PGRs) that are present in a number of popular products on the market and are used by a significant percentage of growers in the indoor gardening industry. Their safety regularly gets called into question by conscientious growers looking for a purer end product.


Maximum Yield Explains Chlormequat Chloride

In most cases, Chlormequat Chloride is used in greenhouses to restrain the growth and development of floriculture crops. However, on rare occasion it can be used to create shorter, bushier medicinal plants that are more suitable for indoor growing.

Because the chemical is absorbed by the roots and leaves, it is more effective when it is applied as a liner dip, substrate drench, sprench, or foliar spray.

Spray application of Chlormequat Chloride has been shown to be more effective when applied on cloudier days, early morning, or any other slow-drying weather conditions. After application, gardeners normally refrain from watering for a minimum of six hours.

Botanists have found that mixing Chlormequat Chloride with Daminozide is more effective than using each of the products on their own. This chemical is often used on woody flowering crops, herbaceous crops, bedding plants, hibiscus, azaleas, geraniums, and poinsettias.

There are two common products in floriculture that contain the active ingredient Chlormequat Chloride. They are Cycocel from OHP Inc., and Citadel from Fine Americas Inc. In each product, the concentration is 11.8%.

When compared to other PGRs, Chlormequat Chloride is quickly metabolized by plants, animals, and soil microbes. Unlike Daminozide, which is listed as a human carcinogenic, Chlormequat Chloride is not listed as a human carcinogen. However, this might just be due to a lack of research or documented studies.


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