RootMaker Products Co.

Huntsville,  AL 
United States

"The Original Root-Pruning Container System"  From propagation to finish, RootMaker containers consistantly produce better plants with fibrous, non-circuling root systems that empower plants to thrive. For "Better growth, better establishment, and better survivalibity" make all the plants you grow RootMaker Strong.

Brands: RootMaker; RootBuilder; RootTrapper; RootCap;


Air Root Pruning

 Press Releases

  • RootMaker®  15 Gallon, Blow Mold  Patent # 10,798,881

    Finally, RootMaker® technology in a

    15 gallon blow mold container.    

    Carl Whitcomb, PhD,  Lacebark Research Inc.

    Container evolution / progress has been fascinating to watch and play a minor part.  The newest evolution of large containers has been blow molding.  I have watched and participated in growing plants in clay pots, to painted metal food cans, to formed galvanized larger containers, then injection molded plastic containers with a life of a few months, to plastics that last for several years.  Injection molding has been refined to work well up to about 5 gallon volume. Then blow molding came into being and large round containers hit the markets.  But, all of the conventional containers had smooth interior walls that allowed roots to circle and intertwine, creating problems short and long term, especially for trees.

    It is a long way from creating slots in round plastic containers using a soldiering iron in 1968 (that provided no benefits) to current RootMaker® container technology.  RootMaker® containers up to the 18 cell trays, are thermoformed polystyrene.

    RootMaker® round containers, one gallon through 5 gallons are injection molded and include ribs, ledges, and openings for effective air-root-pruning. The challenge with blow-molding has been how to extract the container from the blow mold cavity if it contains offsets, ledges and angles necessary for air-root-pruning.

    The problem was overcome by making two ribs on either side of the center of the mold cavity with sufficient offset and slope to allow release of the container.

    Roots grow mostly horizontal, extending until they are deflected or killed.  The tip of the root controls extension and branching.  When a root encounters a rock, other impervious surface or the sidewall of a container, it deflects / ricochets in a new direction.   In the case of conventional round containers, the root extends outward, contacts the container sidewall and, depending on the angle of contact, is deflected left, right or downward, then continues to follow the new trajectory.  It is not uncommon to find a root following the full 360 degree curvature.

    The new RootMaker® 15 gallon blow-mold incorporates the patented  ledges, ribs and openings strategically placed so roots contact the sidewall and are guided into openings for air-root-pruning. 

    In addition to the root pruning features, the built-in handles provide easy handling capability.


    Please visit

    or call 1-800-824-3941 for more information.


  • 32-cell Propagation Trays
    Cell Dimensions - 2.25" X 2.25" X 4". Cell Volume - 11 Cubic Inches.

    First and most critical step toward creating a fibrous root system.
    Promotes horizontal root branching.
    Greater root tip surface means greater efficiency in water and nutrient absorption....

  • Propagation is the first and most critical step toward creating a fibrous root system.  Non-circling fibrous roots allow for rapid establishment following transplanting.  Greater root tip surace area means great effeciency in water and nutrient absorption.  RootMaker propagation trays promote horizontal root branching.  

    Benefits:  Little or no transplant shock.  Plants are equippped for rapid transplant success and long-term health.  Increase yields in produce crops. Higher quality product in less time means more profit.

    Available Sizes:  18-cell, 32-cell, 60-cell and 105-cell trays.  All sizes fit in 10x20 lightweight mesh flat.  

    For best results, we recommend using RootMaker propagation trays on top of a wire bench or other support that allowers airflow, 18 to 24" above the floor to allow good air circulation and thus efficient air-root pruning on all sides of the container, not just the bottom.

    Comparison Picture:  Harry P. Leu Gardens in Orlando, FL shared with us their experiment growing ornamental cabbage 'Crane Bicolor' in RootMaker trays(left) vs. a conventional 24-cell tray(right).  The trays were planted side by side on August 15th and received the same soil, light, water and fertilizer. Check out the massive growth difference!

  • 3-Gallon Injection Molded RootMaker
    Dimensions: 9.5" Height; 10.5" Inside Top Diameter; 11.75" Top Diameter. Volume - 600 cubic inches.

    Creates a fibrous, non-circling root system and accelerates plant growth.
    Air-root prunes and promotes horizontal root branching....

  • Following propagation many nurseries shift to an Injected Molded 1, 2, 3, or 5 Gallon RootMaker to continue air-root pruning.  These containers are designed to air-prune at the container sidewall and maintain roots poised to grow horizontally immediately following transplanting.  This is done with a series of ribs and ledges tha stop root circling and direct roots into opening for continued air-pruning.  This also creates a root system throughout the volume of growth medium and not just in a congested layer at the sidewall.

    Benefits:  Little or no transplant shock.  Plants are equippped for rapid transplant success and long-term health.  More efficient use of water and nutrients.  Increase yields in produce crops. Higher quality product in less time means more profit.

    Available sizes:  1, 2, 3, and 5-Gallon sizes

    For best results use a soiless mix:  ground pine bark, peat, and sand 60x20x20 by volume.  Add 1.5 pounds of Micromax micronutrients and 14 pounds of 17-7-12 Osmocote per cubic yard.  The quantity of dolomite required for best growth depends on the minerals dissolved in your irrigation water.  Other recommendations are site specific.

    When a rooted cutting or seedling from a RootMaker propagtion container is transplanted into a three gallon RootMaker container, the result is a continued fibrous root system with no circling and large quantities of root tips are poised to extend and establish the plant in the field or landscape.  

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