Dr. Greenhouse Launches Vapor Pressure Deficiency (VPD) Application for Crops and Greenhouses – Urban Ag News

Apple and Android’s solution calculates the vapor pressure deficit for a better plant direction

SACRAMENTO, California, May 18, 2022Dr. Greenhouse, Inc.a leading provider of state-of-the-art HVAC design and control solutions for indoor crops, vertical farms and greenhouses, has launched Dr. Greenhouse VPD Calculator application. The VPD Calculator application helps growers to understand their indoor growing environment and its effect on plant responses and HVAC equipment operation.

“Our VPD computer for our site is the most visited resource on our site. Our team decided to create a mobile VPD computer application for growers and farmers to quickly calculate the VPD of their environment, ”notes Dr. Nadia Sabeh, President of Dr. Greenhouse, Inc. “It is essential to know the best environment for plant management and their health. to ensure optimal harvest results and timing. “

Vapor pressure deficit (VPD) is the “pressure” that air exerts on the plant to transpire and move water and nutrients from the roots to other parts of the plant. E.g:

  • With low humidity and high VPD levels, there is more pressure on the plant to sweat and use more water. If the plants are not well watered below high VPD levels, they may begin to wither.
  • With low humidity and low VPD levels, there will be less pressure on the plant to sweat. If plants are overgrown below low VPD levels, they are prone to pest pressure.

VPD can be a valuable measure for growers to predict water use, direct crops to optimal growth, and operate HVAC equipment to achieve the desired indoor environment for plants.

The Dr. Greenhouse VPD Calculator application supports all types of crops and includes VPD search tables for tomatoes, leafy greens and cannabis. The VPD Calculator application allows growers to use their existing air temperature and humidity sensors to understand if the condition of the room is more suitable for vegetative, flowering or stress-induced plants. VPD Calculator provides color-coded results to indicate whether the camera is wet (blue), vegetative (green), or reproductive (yellow), or dry (purple).

For unit designers and growing house managers, the VPD Calculator application can predict evapotranspiration rates to estimate water use and plant dehumidification requirements. With this information, HVAC equipment can be designed to meet the facility’s air conditioning control objectives.

Sabeh comments on VPD, crop production and HVAC design of facilities: “When the right VPD is targeted for a particular crop, variables such as light source, nutrients, water, HVAC and dehumidification can be controlled to minimize operating costs, maximizing at the same time plant growth and health. “

Dr. Greenhouse VPD is free to download Apple App Store and Google Play Store.

About Dr. Greenhouse, Inc.

Dr. Greenhouse, Inc. is a Sacramento-based agriculture and mechanical engineering design firm that provides state-of-the-art HVAC design and control solutions for indoor crops. The company is run by Dr. Nadia Sabeh, a recognized expert in the field of controlled agriculture (CEA). Dr. Greenhouse helps farmers effectively control their environment by enabling them to produce high-quality indoor crops, vertical farms and greenhouses. Dr. Greenhouse has provided expert in early stage programming and mechanical design for 150 units worldwide. Dr. Greenhouse Launches Vapor Pressure Deficiency (VPD) Application for Crops and Greenhouses – Urban Ag News

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