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Seed Ranch > Plant Growth Regulator

Our selection of branded professional grade plant growth regultors.

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NyGuard EZ1 IGR Concentrate - 1 Oz.

NyGuard EZ1 IGR Concentrate - ( 8x 1 Oz.)

Our Price: $12.95

Our Price: $39.50

NyGuard EZ1

The Simple, Easy, Effective Growth Regulator

NyGuard EZ1 is the simplest way to realize the benefits of NyGuard IGR Concentrate. NyGuard EZ1 allows you to effectively break the reproductive cycle of your toughest insect pests, including cockroaches, fleas, mosquitoes, ants, and flies in a pre-measured 1 oz. bottle.
Convenient 1 oz. bottle for easy tank mixing
Labeled for indoor and outdoor use – Gentrol and Precor are only for indoor use
May be used in food and non-food areas
Reduced risk*

NyGuard EZ1

The Simple, Easy, Effective Growth Regulator

B-Nine WSG Plant Growth Regulator - 1 Lb.

Cycocel Plant Growth Regulator - 1 Quart

Our Price: $69.75

Our Price: $84.90

B-Nine Plant Growth Regulator

Water Soluble Granules

B-Nine reduces stature in ornamental plants by reducing internode length. When applied to plant foliage, it is absorbed into the leaf and moves within the plant to growing points to reduce internode elongation through inhibiting gibberellin synthesis. Additional B-Nine benefits include a more aesthetically pleasing, compact plant with deeper green color that is more resistant to breaking during shipping.

B-Nine may be used on ornamental plants grown in commercial or research greenhouses, shadehouses, and nurseries. Containerized plants labeled for use by B-Nine are but not limited to: Azaleas, Bedding Plants/ Flowering Plants, Plugs and Liners, Chrysanthemums, Foliage Plants, Gardenias, Hydrangeas and Poinsettias.

Rate of use: Rates range from 1000-7500 PPM (refer to the product label for specific rates). Spray should be directed at the leaves and stems just to the point of run-off. Application volume should be one gallon per 200 sq. ft. of coverage.

Active ingredient: 85% Daminozide

Product Label

Cycocel Plant Growth Regulator

Rate of use: 0.217-3.25 fl. oz./gallon; see label for details

Cycocel is among the most reliable and widely used plant growth regulators on the market today. Cycocel may be used on any crop in the greenhouse or nursery, including but not limited to poinsettias, hibiscus, azaleas, and geraniums to reduce stem elongation, induce early flowering, improve flowering, and to produce compact plants with multiple buds per shoot.

Forgiving PGR; easy to use by experienced and new growers on all labeled crops
Enhances crops aesthetic appeal and improves durability during shipping
Contains wetting agent
Synergistic with B-Nine
Labeled for use on a wide range of crops

Active ingredient: 11.8% Chlormequat

Product Label

A-Rest Plant Growth Regulator - 1 Quart

Atrimmec Plant Growth Regulator - 1 Quart

Our Price: $89.77

Our Price: $104.45

A-Rest Plant Growth Regulator

A-Rest is a plant growth regulator which is used on container grown bedding plants, flowers and foliage plants. A-Rest produces a plant that is more compact by inhibiting gibberellin biosynthesis, which results in shorter stem length. This helps growers produce high quality plants that are more compact, uniform in height, darker in color, more able to withstand shipping, require less water, and best of all, more attractive to the consumer.

Rate of use: The amount of A-Rest required for an optimum growth response depends upon pot size, stage of growth, method of application, season and varietal response. Please see label for dilution guidelines.

Active ingredient: 0.0264% Ancymidol

Product Label

Atrimmec Plant Growth Regulator

is a systemic plant growth regulator (PGR) that works by blocking the plant hormones that stimulate growth. Atrimmec applied as a foliar spray interrupts apical shoot elongation, so one application with one trimming can last the entire season. Spraying shrubs, hedges, trees, and groundcovers reduces trimming and pruning labor by 50% or more, and improves the appearance of landscape ornamentals by promoting lateral branching. This gives plants a denser, fuller look. Hedges and shrubs that show irregular shapes, including damage from pests and weather, can fill in lushly, even on the old wood.

Atrimmec is labeled for bark banding and soil drench applications to reduce nuisance fruit and flower formation. Bark banding application is a quick, efficient and effective procedure accomplished by spraying the trunk of the targeted tree from a height of 4.5' to 5' to the soil surface. A single application of Atrimmec two to four weeks prior to early bud formation (pinhead size or smaller buds) can prevent undesired fruit for the season on certain landscape trees.

Spray-apply to retard growth of hedges, shrubs, trees, and groundcovers
Reduces trimming, pruning and cleanup maintenance by 50% or more
In many areas, one trimming and treatment controls growth all season long
Keeps plants looking trimmed longer
Promotes branching; forms a fuller, more compact, uniform shape
Groundcovers establish sooner, producing denser cover without encroaching on driveways, walks, and walls
Reduces nuisance fruits on landscape plants with bark banding and drench applications

Use: 1-5 fluid ounces per gallon, depending on species treated

Product Label

Configure Plant Growth Regulator - One Half Gallon

ProGibb T&O Plant Growth Regulator - 1 Quart

Our Price: $122.50

Our Price: $139.90

Configure Ornamental Plant Growth Regulator

Use rate: 50-3000 ppm (0.3-18 fl. oz./gallon of water); see label for details

As the only pure 6-BA PGR, Configure effectively increases lateral branching and flowering in a number of popular ornamental species. In addition, applications of Configure may reduce the height of treated plants, resulting in more compact and marketable crops. Configure is labeled for use on containerized annual and perennial flowering and foliage crops as well as tropical plants.

Active ingredient: 2% 6-BA

Product Label

ProGibb T&O Plant Growth Regulator - 1 Quart

ProGibb T&O is an extremely active plant growth regulator. It promotes increased flower size, increased flower number, uniform flowering, increased stem elongation, and a decrease in time to flower. It has been shown to reduce the minimum temperature required to initiate plant growth and will overcome bud and seed dormancy.

Great for use with ornamental crops, cut flowers, and turfgrass.

Rate of use: Between 1-100 ppm dependent upon application use (See Product Label below)

Active Ingredient: Gibberellic Acid - 4%

Product Label

Bonzi Plant Growth Regulator - 1 Quart

Fresco Plant Growth Regulator - 1 Quart

Our Price: $143.50

Our Price: $149.89

Bonzi Ornamental Plant Growth Regulator

Bonzi plant growth regulator ensures plants stay compact and beautiful to keep them at their peak longer for increased profitability.

Keeps plants uniformly compact and strong by reducing internode stretch
Can be used on a wide variety of bedding plants, bulb crops, annual and perennial plants, herbaceous and woody ornamentals
Can be applied as a single spray, drench, or preplant bulb soak and provides an excellent margin of safety at all stages of development
Produces attractive and marketable plants, bringing out the full beauty of ornamentals by keeping them compact
Maintains the plant-to-pot size ratio for aesthetically pleasing plants with deeper green foliage
Transport is less stressful with less breakage and plants have an extended, enhanced shelf life, where they stay at their peak longer

Rate of use: For drench applications, 0.05-0.2 ppm; for preplant bulb soaks, 5-25 ppm; for spray application on most bedding plants, a range of 5-90 ppm is recommended. Please see label for specific instructions and rate ranges by plant species to be treated.

Active ingredient: 0.4% Paclobutrazol

Product Label

Fresco Plant Growth Regulator

Fresco is approved for reduction in lower leaf yellowing in Easter lily, LA hybrid lily and Asiatic lily. Fresco promotes bract expansion on poinsettia. By making plants more presentable, Fresco helps growers produce greater numbers of top-quality plants.

Fine is currently conducting research to expand the Fresco label to cover additional ornamental plant species.

Rate of use: 0.2-21.0 mL/gallon, depending on method of application and desired result. See label for complete information.

Active Ingredients:

1.8% GA 4/7

1.8% 6-BA

Registered Crops: chrysanthemums, gardenias, azaleas, hydrangeas, poinsettias, petunias, marigolds, others

Product Label

Citadel Chlormequat Plant Growth Regulator - 1 Gallon

Cutless 0.33G Landscape Growth Regulator - 21 Lbs.

Our Price: $167.50

Our Price: $174.89

Citadel Ornamental Plant Growth Regulator

Citadel provides effective PGR activity on a broad range of containerized crops, such as poinsettia, geraniums, azaleas, hibiscus, bedding plants and other herbaceous and woody ornamentals. By inhibiting the biosynthesis of gibberellins, Citadel reduces plant height by limiting internode elongation.

Citadel can be applied alone or tank-mixed with other plant growth regulators such as Dazide 85 WSG (85% daminozide) to produce higher-quality plants. On certain crops a tank mix of Citadel and Dazide 85 WSG can provide a synergistic effect that results in enhanced activity.

Rate of use: 600-2000 ppm (.66-2.17 fl. oz./gallon of water), depending on the crop and desired results. See label for complete instructions.

Active ingredient: 11.8% Chlormequat Chloride

Product Label

Cutless 0.33 G Landscape/Ornamental
Growth Regulator

Use rate: 3.5-21 lbs./1000 sq. ft., depending on type and size of plants treated

Cutless Granular is a systemic plant growth regulator that slows shoot growth of hedges, shrubs and groundcovers in landscaped areas. Plants treated with Cutless Granular will require less trimming and will have a more compact growth form.

Use of Cutless Granular will improve your profitability by reducing labor and fuel costs. Sustainable benefits include improved plant health and reductions in irrigation, fuel, emissions and plant material sent to landfills.

Active ingredient: 0.33% Flurprimidol

Product Label

Cycocel Plant Growth Regulator - 1 Gallon

Piccolo PGR - 1 Gallon

Our Price: $179.89

Our Price: $187.50

Cycocel Plant Growth Regulator

Rate of use: 0.217-3.25 fl. oz./gallon; see label for details

Forgiving PGR; easy to use by experienced and new growers on all labeled crops
Enhances crops aesthetic appeal and improves durability during shipping
Contains wetting agent
Synergistic with B-Nine
Labeled for use on a wide range of crops

Active ingredient: 11.8% Chlormequat

Product Label

Piccolo Plant Growth Regulator

Featuring the popular active ingredient paclobutrazol, Piccolo brings out the best in ornamentals by producing compact, consistent quality plants. By delivering outstanding height and radius control, Piccolo enhances the quality of bedding plants, flowering and foliage crops, bulb crops, perennials and woody ornamentals, making them easier to market and more profitable to produce. As a spray or drench, Piccolo has been proven in dozens of university trials and ranks among the most popular PGRs among quality-minded growers.

Rate of use: Click here for Use Guide

Active ingredient: 0.4% Paclobutrazol

Product Label

Topflor Granular Ornamental PGR - 20 Lbs.

B-Nine WSG Plant Growth Regulator - 5 Lbs.

Our Price: $202.77

Our Price: $253.95

Topflor Granular Ornamental Plant Growth Regulator

Topflor Granular contains the active ingredient flurprimidol, which effectively reduces internode elongation through the inhibition of gibberellin biosyntheses, resulting in a more desireable compact ornamental plant. Topflor Granular has been shown to increase the quality of plants even in the absence of growth reduction. Some of these desireable qualities include darker leaf color, higher chlorophyll content, greater leaf thickness, stronger stems, and decreased water loss. When used as directed, Topflor Granular produces no phytotoxic effects. Topflor Granular is effective in controlling the height of most ornamental crops. The use and rate recommendations for the species that follow should be a starting point in determining the best rate for your specific cultural and environmental growing conditions.

Rate of use: Between 0.1 - 9.2 grams per pot depending on the type of ornamental and container size. See product label below for full details.

Active Ingredients: Flurprimidol - 0.17%

Product Label

B-Nine Plant Growth Regulator

Water Soluble Granules

Active ingredient: 85% Daminozide

Product Label

Collate Ethephon Plant Growth Regulator - 1 Gallon

Dazide 85 WSG Plant Growth Regulator - 5 Lbs.

Our Price: $269.95

Our Price: $272.95

Collate 2 Ethephon Plant Growth Regulator

Rate of application: 500 ppm (2.7 fl. oz. in 10 gallons of water); see label for details

Featuring 2 pounds of ethephon per gallon, Collate can be used to increase lateral branching in many popular ornamental varieties, including azaleas, chrysanthemums, geraniums, lantana, petunias and verbena. It is also ideal for controlling plant height and stem topple in daffodils and hyacinth, as well as delaying flowering in a wide range of ornamental crops. Ethephon, the active ingredient in Collate, has been a staple of ornamental production for years.

Active ingredient: 21.7% Ethephon

Product Label

Dazide 85 WSG Plant Growth Regulator

Dazide 85 WSG is a plant growth regulator from Fine Americas, Inc., containing 85% daminozide, and formulated in an exceptional, high-quality water soluble granule. It helps growers manage plant growth and development to ensure that plants are compact, strong, and better able to cope with transportation or transplanting. Dazide 85 WSG can be used on a wide range of ornamental plants.

Dazide 85 WSG improves plant quality by:

Producing a more compact plant
Stimulating the plant to produce more flowers
Enhancing foliage color
Producing thicker, stronger stems
Stimulating greater root development (improved nutrient and water uptake, reduced transplant stress)

Rate of use: 0.16-1.2 oz/gallon, depending on species treated; see label for full information

More Information

Product Label

Cutless 0.33G Landscape Growth Regulator - 40 Lbs.

Topflor Ornamental PGR - 2 Liters

Our Price: $281.95

Our Price: $294.90

Cutless 0.33 G Landscape/Ornamental
Growth Regulator

Use rate: 3.5-21 lbs./1000 sq. ft., depending on type and size of plants treated

Active ingredient: 0.33% Flurprimidol

Product Label

Topflor Granular Ornamental Plant Growth Regulator

Topflor Plant Growth Regulator is for use on ornamental plants grown in containers in nurseries, greenhouses, and shadehouses. Use of Topflor effectively reduces internode elongations through the inhibition of gibberllin biosyntheses, resulting in a more desireable compact plant. Topflor has been shown to increase the quality of plants even in the absence of growth reduction. Some of these desireable qualities include darker leaf color, higher chlorophyll content, greater leaf thickness, stronger stems, and decreased water loss. When used as directed, Topflor produces no phytotoxic effects. Do not reuse pots, trays, or other containers that previously were used in the production of a crop that was treated with Topflor.

Rate of use:
Plants absorb Topflor through foliage, stems, and roots. Topflor may be applied as a spray, drench, or chemigation to achieve the desired plant height control.

Spray: Apply uniformly at a rate of 1 gallon per 200 sq. ft. See product label for dilution rates. (For desired concentration of 5 ppm a.i., use 0.16 fl. oz. per gallon solution)

Drench: Generally, a volume of 2 fl. oz. is required to treat a 4-inch pot or 4 fl. oz. for treatment of a 6-inch pot. Typical application rate is 1 gallon of drench solution (typically 0.25 ppm - 10 ppm as a.i.) per 32 six inch potted plants.

Active Ingredients: Flurprimidol - 0.38%

Product Label


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