Wadsworth Controllers


USGR has offered Wadsworth environmental control systems for over 50 of our 80 years in business. We have Wadsworth greenhouse, nursery and garden centers controllers operating worldwide in controlling the environments of many different crops in so many different environments with great success. Wadsworth controls are low maintenance because of precise control. USGR and Wadsworth bring to our greenhouse and nursery clients outstanding greenhouse components, systems and equipment of all types. We use Wadsworth Controllers and other environmental control products to integrate and efficiently operate all of our various greenhouse products that require automatic control.

In order to help our clients select the best integrated system and environmental control, we also offer an extremely strong background in plant growth technology. Various crops require different environmental control systems that will promote the highest quantity and best quality.

Our knowledge of operating systems and plant growth technology and environmental control systems are brought together and is part of our service. Each plant whether it be propagation, germination, flower or vegetable production has its own unique requirement. USGR has the ability and background to make this marriage between that plant’s requirements and the operating systems we provide with Wadsworth and other outstanding environmental control systems.


Imagine a controller that offers simple, flexible climate management and excellent results. With the STEP Up you’ll see improved performance and increased profits. Like traditional staged controls, it’s simple to use, and we’ve added a brighter LCD screen and an upgraded user interface, both designed to improve your experience.


  • 6 stages: 2 heating and 4 cooling
    • Easily adjust the temperature for each stage
  • 3 setpoint temperature periods – day, night and DIF; auto adjusts based on sunrise and sunset
  • 2 modulating outputs control up to 2 vents or 1 vent and 1 curtain
  • 1 analog output (0 to 10VDC or 4-20 milliamps) to control variable-speed fans and modulating valves
  • Cycle timer
  • Alarm output
  • Password protection
  • Easy to use push button interface
  • Large menu-driven screen displays current temperature, time, date, grow weeks, equipment status, etc.
  • Records the temperature in 15-minute increments and stores it for 7 days
  • Includes logs and graphs data
  • Logs high, low and average temperatures
  • Timed override switches in addition to the manual over ride toggle switches
  • Stores settings in the event of a power failure
  • Optional humidity sensor
  • Durable corrosion-resistant cabinet: 9.5” x 6.25” x 3.75” (241 x 159 x 95 mm)
  • Removable terminal blocks for easier wiring
  • Requires STEP Up on Contactor Panel, sold separately

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Wadsworth designed this advanced integrated controller to offer flexibility and functionality. All Wadsworth Controllers bears the UL (Underwriters Laboratory) to mark your assurance of regulatory approval and safety.


  • Single zone control can connect up to 100 zones
  • New and improved back lit LED screen
  • 4 analog outputs (0 to 10VDC) to control variable-speed fans and modulating valves
  • 3 setpoint periods – day, night and DIF
  • 12 relay outputs with manual override switches
  • Ramping allows for gentle transition between setpoint periods and saves fuel
  • 2 analog input channels for connecting light, CO2, RH and temperature sensors
  • 4 digital detector channels sense precipitation, wind speed and wind direction
  • Records the status of all inputs and outputs in 15-minute increments
  • Alarm outputs: temperature, RH and power failure
  • Replaceable 10 amp DPDT relays can operate a wide variety of equipment. These relays reduce the cost of
    your contactor panel
  • Cabinet measures 16” x 16”x 5” (406 x 406 x 127 mm) Shipping weight 28 lbs / 13 kg
  • Keypad for easy operation
  • Add STEPsaver software for more powerful data storage, reporting and remote monitoring

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Flexible and powerful, this multi-zone control gives you the ability to divide its 24 outputs any way you’d like between one and eight zones. This is the perfect control for greenhouses with more equipment than will fit on an EnviroSTEP control or for growers with multiple zones.


  • 1-8 zone control
  • 3 setpoint periods — day, night, and DIF
  • 24 relay outputs with manual override switches
  • Replaceable 10 amp DPDT relays, can operate a wide variety of equipment — these relays reduce the cost of your contactor panel
  • 4 analog outputs (0 to 10VDC) to control variable-speed fans and modulating valves
  • 32 analog input channels for connecting light, CO2, RH and temperature sensors
  • 8 digital detector channels sense precipitation, wind speed, and direction
  • Ramping allows for gentle transition between set point periods and saves fuel
  • Records the status of all inputs and outputs in 15-minute increments
  • Alarm outputs: temperature, RH and power failure
  • Large display includes menu-driven choices and graphic functions
  • Keypad for easy operation
  • Durable corrosion-resistant cabinet with locking door protects your control
  • Cabinet size: 32″ x 24″ x 5″

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Wadsworth Seed Controllers


A remarkable new touchscreen climate control with a user interface that makes managing growing environments child’s play. Engineered for power; designed for ease.
Climate control with accessibility and power
Seed combines the accessibility of an intuitive touchscreen interface with the expansive power of the Seed I/O input and output system, providing exact information at a glance.

Introducing Seed V2 which has even more capabilities and power than the original.


  • Improve the yield and quality of your crop
  • Increase labor and energy efficiency
  • Intuitive interface accommodates beginners and experts

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Seed 16®

All of the sophistication and ease of Seed, trimmed down to suit your needs. With 16-outputs and 16-inputs, configured any way you’d like, this is the solution smaller operations have been looking for. Starting out small but planning for growth? Seed 16 helps you plan for the future with a lower entry price and expandability.


  • Highly responsive touchscreen technology
  • Graphic interface provides extensive information at a glance
  • Navigate easily with a swipe of the screen
  • Design accommodates beginners and experts
  • Seamless access from multi-zone home screen to detailed settings for individual equipment
  • Color coding indicates each zone’s status, allowing an overview of multiple zones from the home screen

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  • Single Stage Thermostats
  • Two Stage Thermostats
  • Wadsworth’s newest Step-Up 6-stage controller
  • Step 50-A – Replaces Step 50 – Parts for Step 50 still available
  • Mini-Step – 4 stage electronic controller, 2 temperature settings, includes environmental control package, contactor panel. Has day and night temperature set point. Push button control.
  • Step 500 – 3 stages of heating, 5 stages of cooling, includes outdoor sensor, in use since early 70’s
  • Micro-Step 500 SA – no longer available but you may still order accessories and spare parts and replace contactor panels.
  • EnviroStep – Works great for multiple greenhouses. 12 output that control the majority of your greenhouse equipment.
  • VersiStep – Fully integrated. Computerized controls. 24 output. Custom program as you require.
  • Weather Guard – Takes worry about protecting your greenhouse and crop from wind, rain and snow. An over-ride system for your protection.
  • M-1608 – Vent controller. Workhorse of the industry. 3 stages of incremental vent control. 4 stages for use with heater or other control requirement.
  • StepSaver – Software to easily monitor and control greenhouse from your PC.
  • Sensors – Wide variety of sensors. – Aspirators – temperature – CO2 – soil probe – hot water/steam. Light. Others as required.
  • Weather Station – Monitors outdoor conditions; integrate with your various Step Controllers.
  • Alarm Manager – Protect your crops by receiving notification when conditions change. Program up to 20 phone numbers.

Comparative Chart for Step Controllers