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Understanding VPD: The Key to Better Plant Growth
VPD (Vapor Pressure Deficit) measures how dry or humid the air is based on temperature and humidity. It is expressed in kPa and shows how easily plants can release moisture through transpiration.
The right VPD helps plants breathe, absorb nutrients, and grow efficiently.
- VPD too high: Air is too dry → plants lose water too fast, causing dehydration and stress.
- VPD too low: Air is too humid → transpiration slows, nutrient uptake decreases, and the risk of mold and root problems increases.
Here are the recommended Leaf Vapor Pressure Deficit (LVPD) levels for each stage of the plant's life cycle. Note that variations may occur between different strains.
Keeping VPD In The Optimal Range
A stable VPD requires continuous balance between temperature and humidity.
Smart VPD Control monitors changes and automatically adjusts moisture levels to keep your plants in the ideal range.
VPD Control Solutions
Mars Hydro Advanced VPD Control Kit – Humidifier, Dehumidifier & Auto Refill System for Stable VPD and Humidity Management
*Please note: To enable Smart VPD Control, please add the iControl Smart Controller or iHub-Pro.
Upgrade from manual humidity control to automated VPD stability.
The Mars Hydro Advanced VPD Control Kit combines a humidifier, dehumidifier, and auto refill system to maintain a consistent grow environment with less daily maintenance. Designed for dedicated growers who need reliable humidity control throughout the entire growth cycle.
Key Benefits
1. Automatic Water Refill
No daily tank checks. Automatically keeps your humidifier supplied with water for stable humidity.
2. Extended Operation
Run longer with fewer interruptions. Ideal for large grow tents and long growth cycles.
3. Stable Humidity & Better VPD Control
Humidifier + Dehumidifier + Auto Refill work together to maintain a more consistent grow environment.
4. Less Maintenance
Reduce manual refills and humidity adjustments. Spend more time focusing on plant growth.
Package1 Includes: 1x Dehumidifier(with power Cord), 1x Flexible Long Air Duct(30.5cm), 1x Flexible Short Air Duct(22cm), 1x Drain Pipe (150cm), 1x Temp &Humidity Sensor Package2 includes: 1 x 6L humidifier, 1 x Temp & Humidity Sensor, 1 x flexible long hose, 2 x flexible short hose, 2 x Velcroes, 1 x 2-way nozzle, 1 x tool kit; Package3 includes: 1x Collapsible Bucket (capacity 15L), 1x PE Pipe (Overall Length: 5M), 1x 1/8 Inch L-shaped External Thread Elbow, 1x T-shaped Connector, 1x Bucket Connector, 1x L-shaped Tank Connector, 1x L-shaped Double Connector, 1x Float Valve, 1x On-off Valve, 1x Pipe Cutter
Mars Hydro VPD Control System Kit with 12L/Day Dehumidifier & 6L Humidifier, Complete Humidity Balance Solution for Indoor Growing
*Please note: To enable Smart VPD Control, please add the iControl Smart Controller or iHub-Pro.
Take full control of your growing environment with the Mars Hydro VPD Control Kit. Designed with precision humidity management technology, this dehumidifier and humidifier combo helps maintain the ideal VPD range for healthier plants and more consistent growth.
By balancing moisture levels throughout the grow cycle, it reduces humidity fluctuations, supports efficient transpiration, and creates a stable climate where plants can maximize nutrient absorption and development.
Key Benefits:
Precision VPD environment control
Smart balance between humidification and dehumidification
Stable humidity for different growth stages
Ideal solution for grow tents and indoor cultivation
Package1 Includes: 1x Dehumidifier(with power Cord), 1x Flexible Long Air Duct(30.5cm), 1x Flexible Short Air Duct(22cm), 1x Drain Pipe (150cm), 1x Temp &Humidity Sensor
Package2 includes: 1 x 6L humidifier, 1 x Temp & Humidity Sensor, 1 x flexible long hose, 2 x flexible short hose, 2 x Velcroes, 1 x 2-way nozzle, 1 x tool kit;
More Value Bundles
Discover More Combos Designed for Every Grower
【Earn 800 Points】Mars Hydro Auto Humidity System | New 6L Ultrasonic Cool Mist Plant Humidifier With 15L Auto-Refill Kit-Indoor Growing Solution
6L SmartHumidifier:6L large capacity for up to 38 hours runtime, ideal for 1.5m×1.5m grow spaces. Features temp/humidity sensing, iControl integration, and WiFi/app remote control for precise humidity management and healthier plant growth.
15L Auto-Refill Kit:15L food-grade reservoir compatible with multiple devices. Mechanical float valve auto-maintains water level, preventing leaks/overflows. Tool-free setup.
⚠️Only compatible with Mars Hydro 6L humidifiers with removable top caps.
Please note: This order will be shipped in two separate packages.
Package 1: 1 x 6L humidifier, 1 x Temp & Humidity Sensor, 1 x flexible long hose, 2 x flexible short hose, 2 x Velcroes, 1 x 2-way nozzle, 1 x tool kit;
Package 2:1x Collapsible Bucket (capacity 15L), 1x PE Pipe (Overall Length: 5M), 1x 1/8 Inch L-shaped External Thread Elbow, 1x T-shaped Connector, 1x Bucket Connector, 1x L-shaped Tank Connector, 1x L-shaped Double Connector, 1x Float Valve, 1x On-off Valve, 1x Pipe Cutter
[Smart Control] Mars Hydro 6L Indoor Cool Mist Humidifier for Plants with iHub Pro
iHub Pro: features 10 pre-labeled smart outlets designed to power and control all essential grow equipment, including: 2 LED grow lights, inline fan, clip fan, humidifier, dehumidifier, drip irrigation system, heat mat, heater, and 2 customizable outlets. Simplify and centralize your grow room setup with a single intelligent hub.
6L humidifier: Optimize your plant care routine with the Mars Hydro 6L Plant Humidifier. This advanced ultrasonic humidifier offers adjustable mist settings and constant humidity control to create the ideal environment for plant growth. It features user-friendly interface and remote operation, ideal for use in grow tents (up to 150x150), greenhouses, or other indoor spaces.
6L humidifier package includes:
1 x 6L humidifier, 1 x Temp & Humidity Sensor, 1 x flexible long hose, 2 x flexible short hose, 2 x Velcroes, 1 x 2-way nozzle, 1 x tool kit;
iHub Pro package includes:
1 × MH-iHub Pro, 1 × Temp/Humidity Sensor, 2 × 0.25m (0.82ft) RJ12 Cords, 5 × 2.5m (8.2ft) RJ12 Cords, 3 × RJ12 T-Shape Splitters
[Smart Control] Mars Hydro 6L Indoor Cool Mist Humidifier for Plants with Smart iControl Controller
Upgraded Full Environmental Control: iControl connects to fans, humidifiers, dehumidifiers, and more, enabling complete grow environment automation. iControl now offers advanced temperature and humidity strategies along with real-time VPD (Vapor Pressure Deficit) monitoring. Simply set your target growing environment, and the controller will automatically adjust connected devices (fans, humidifiers, and dehumidifiers) to maintain ideal conditions throughout the entire grow cycle.
6L humidifier: Optimize your plant care routine with the Mars Hydro 6L Plant Humidifier. This advanced ultrasonic humidifier offers adjustable mist settings and constant humidity control to create the ideal environment for plant growth. It features user-friendly interface and remote operation, ideal for use in grow tents (up to 150x150), greenhouses, or other indoor spaces.
Please Note:
This order will be shipped in two separate packages.
📦Package 1: 1 x 6L humidifier, 1 x Temp & Humidity Sensor, 1 x flexible long hose, 2 x flexible short hose, 2 x Velcroes, 1 x 2-way nozzle, 1 x tool kit;
📦Package 2: 1 x iControl Controller,1 x Temp/Humidity/Light 3-in-1 Sensor,1 x Power Supply,4 x RJ12 T-Shape Splitters,3 x 0.25m (0.82ft) RJ12 Cords,5 x 2.5m (8.2ft) RJ12 Cords,2 x Hanging Kits
[Smart Control]Mars Hydro 12L/Day Dehumidifier for Indoor Grow Tents with iControl Controller
Pair the dehumidifier with a Smart Controller to enable precise humidity automation. Set target humidity, temperature rules, and schedules, while monitoring real-time data. The dehumidifier can intelligently link with other compatible devices(led grow light,inline fan.clip fan and so on) and automatically adjust operation to maintain a stable, optimized grow environment with minimal manual input.
Water Tank Capacity: 2.1 L
Maximum Dehumidification Capacity: 12 L/Day Recommended Coverage: Ideal for grow tents up to 150×150cm. Real-world performance is influenced by environmental conditions such as temperature, humidity, and tent size. Package one: 1x Dehumidifier(with power Cord) 1x Flexible Long Air Duct(30.5cm) 1x Flexible Short Air Duct(22cm) 1x Drain Pipe (150cm) 1x Temp &Humidity Sensor Package two: 1 x iControl Controller 1 x Temp/Humidity Sensor 1 x Power Supply 4 x RJ12 T-Shape Splitters 3 x 0.25m (0.82ft) RJ12 Cords 5 x 2.5m (8.2ft) RJ12 Cords 2 x Hanging Kits
Maximum Dehumidification Capacity: 12 L/Day Recommended Coverage: Ideal for grow tents up to 150×150cm. Real-world performance is influenced by environmental conditions such as temperature, humidity, and tent size. Package one: 1x Dehumidifier(with power Cord) 1x Flexible Long Air Duct(30.5cm) 1x Flexible Short Air Duct(22cm) 1x Drain Pipe (150cm) 1x Temp &Humidity Sensor Package two: 1 x iControl Controller 1 x Temp/Humidity Sensor 1 x Power Supply 4 x RJ12 T-Shape Splitters 3 x 0.25m (0.82ft) RJ12 Cords 5 x 2.5m (8.2ft) RJ12 Cords 2 x Hanging Kits
[Smart Control]Mars Hydro 12L/Day Dehumidifier for Indoor Grow Tents with iHub-Pro Power Strip
Water Tank Capacity: 2.1 L
Maximum Dehumidification Capacity: 12 L/Day Recommended Coverage: Ideal for grow tents up to 150×150cm. Real-world performance is influenced by environmental conditions such as temperature, humidity, and tent size. When connected to the iHub-Pro, the dehumidifier becomes part of a fully integrated smart grow ecosystem. Using unified environment strategies, it operates in coordination with lights, fans, and other devices, responding dynamically to real-time conditions to deliver seamless, hands-free control throughout the entire grow cycle. Package one: 1x Dehumidifier(with power Cord) 1x Flexible Long Air Duct(30.5cm) 1x Flexible Short Air Duct(22cm) 1x Drain Pipe (150cm) 1x Temp &Humidity Sensor Package two: 1 × iHub Pro 1 × Temp/Humidity Sensor 2 × 0.25m (0.82ft) RJ12 Cords 5 × 2.5m (8.2ft) RJ12 Cords 3 × RJ12 T-Shape Splitters
Maximum Dehumidification Capacity: 12 L/Day Recommended Coverage: Ideal for grow tents up to 150×150cm. Real-world performance is influenced by environmental conditions such as temperature, humidity, and tent size. When connected to the iHub-Pro, the dehumidifier becomes part of a fully integrated smart grow ecosystem. Using unified environment strategies, it operates in coordination with lights, fans, and other devices, responding dynamically to real-time conditions to deliver seamless, hands-free control throughout the entire grow cycle. Package one: 1x Dehumidifier(with power Cord) 1x Flexible Long Air Duct(30.5cm) 1x Flexible Short Air Duct(22cm) 1x Drain Pipe (150cm) 1x Temp &Humidity Sensor Package two: 1 × iHub Pro 1 × Temp/Humidity Sensor 2 × 0.25m (0.82ft) RJ12 Cords 5 × 2.5m (8.2ft) RJ12 Cords 3 × RJ12 T-Shape Splitters
