Gemini Granular Herbicide

Gemini Granular Herbicide
$143.57  $159.52  Save 10%!

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Product Overview

Gemini Granular Herbicide is a combination of selective pre-emergent herbicides for the control of over 120 listed grass and broadleaf weeds with low risk of phytotoxicity for up to 4 months. It contains the two actives Prodiamine, which inhibits microtubule assembly during cell division and Isoxaben, which disrupts cell wall development. It is formulated with the R-50 Optimizer, a powerful weed management tool to control more by using less. Once applied and water, the R-50 Optimizer moves more of the active off the carrier and spreads it further out to create a wider barrier of protection. This allows for more efficient and effective control with less product use and opening up more flexibility to use Gemini Granular Herbicide up to 3 times a year. Use on field ornamentals, container ornamentals, landscape ornamentals and christmas tree farms. This product comes in a 50 lb bag of granules.

Features and Specs

Active Ingredient Isoxaben 0.25%, Prodiamine 0.4%
For use in Container ornamentals, Field ornamentals, Landscape ornamentals, Christmas tree farms.
Pet safe Yes, if used as directed on the label.
Shipping Weight 51.50 lbs
Manufacturer Everris Na Inc. (Mfg. Number: E95765)
UPC 848264004828
EPA Registration 58185-180


Uses and Application

Apply Gemini Granular for selective pre-emergence control of listed grass and broadlead weeds in the following areas:

  • Container, field-grown, and landscape ornamentals
  • Christmas tree farms

New Plantings, Replanting and Rotational Plantings

For a period of 1 year after treating an approved use site with Gemini Granular, plant only ornamental species listed as tolerant on this label unless the following test has shown that indicator species grow normally:

  • Sow several test strips of an indicator plant such as wheat, sorghun or corn into the treated area. If the indicator plants germinate and grow normally to a height of 12 inches with normal root development, it is safe to plant.

In areas disturbed by new plantings or replanting or labeled species, it may be necessary to retreat exposed soil to maintain satisfactory weed control, but to prevent exceeding the maximum annual limit of prodiamine do not apply more than 375 lbs. of product per acre per year.


  • Do not graze or feed livestock forage cut from areas treated with Gemini Granular.
  • Do not apply Gemini Granular to plants that will be consumed for food use.
  • do not apply to golf course putting greens and tees.
  • Do not exceed a dosage of 2.43 pounds active ingredient per acre (375 pounds of Gemini Granular per acre) (1.5 pounds prodiamine and 0.93 pounds isoxaben) per year on any use site.
  • The state of Arizona has not been approved this product for use on agricultural commodities. If grown for commercial production, use on the following sites/crops is prohibited: container grown field ornamentals, field grown ornamentals, ornamental bulbs, and Christmas tree/conifer plantations.
  • Not for use on ornamental bulb grown for commercial production in California.
  • Not for sale, use or distribution in the state of New York.

Treatment of Turfgrass or Ornamental Species Not Listed on the label for Gemini Granular: Users who wish to use Gemini Granular are limited to non-food, ornamental plant species in labled use sites. Prior to large scale application, user should trial plant species not listed on this label.


Site Application Instructions
Newly-Transplanted Container or Field Nursery Stock
  • Do not apply until soil has settled around transplants and roots have formed.
  • Do not apply to wet foilage as damage may occur.
  • Apply after cuttings form roots and are established.
  • To avoid inhibition or the tissue union, apply before budding/grafting after buds/grafts have taken.
  • Do not apply to pots less than six inches wide.
Established Container, Field Nursery Sotck, or Landscape Plants
  • Apply at any time as an over-the-top, or soil directed application.
Landscape ( or Ornamental) Plantings
  • Apply as an over-the-top, or as soil directed application.
  • Delay applications to newly transplanted ornamentals until soil has settled around transplants.
Bare Ground Application for Container Placement
  • Apply to soil (including mulch, gravel, wood chips, or orther permeable base) upon which containerized ornamentals are placed.
  • After Gemini Granular is applied, use post-emergence herbicides to control break through weeds. Or if necessary, perform shallow cultivation or hand weeding to avoid disturbing the herbicide barrier.
In Shadehouses and Uncovered Polyhouses
  • After Gemini Granular is applied, houses must remain uncovered for at least 21 days.
  • In addition, plants must receive 2 irrigations totaling at least 0.5 inches of water before covering.
Ornamental Bulbs (Not for use on ornamental bulbs grown for commercial production in California).
  • Gemini Granular can be applied to bulbs. Apply before bulbs emerge. Do not apply after emergence.


Low Rate

Medium Rate High Rate Do not exceed the Maximum Annual Rate of:
Pounds per Acre 100 150 200 375
Bags per Acre 2 3 4 7.5
Pounds per 1000 sq. ft. 2.3 3.4 4.6 8.6
Grams per sq. ft. 1.0 1.6 2.1 3.9

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Can Gemini Granular Herbicide be used in established landscape beds?

Is this a good product to apply in established ornamental landscaped beds with different types of plants and or trees without harming the plants and controlling the unwanted weeds?


Yes, the Gemini Granular Herbicide can be safely applied to landscape ornamentals and trees to help prevent unwanted weeds from coming up in the spring and fall.  Please refer to the product label for complete instructions.

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