VPD Simply Explained: The Master Key to Professional Growth
Most growers focus only on temperature and humidity. But if you ignore the relationship between them – called VPD – your plants are essentially ‘holding their breath’. In this guide, we break down the science so you can grow like a pro.
What is VPD and why should you care?
VPD is like the ‘suction’ of the air. If the air is too dry, the plant loses water too fast (stress). If it’s too humid, the plant can’t ‘sweat’ (stagnation). Master the sweet spot, and your plant pumps nutrients like a machine.
The Seedsman Factor: Genetics & Transpiration
High-performance genetics from Seedsman need an optimized environment to show their true colors. A stable VPD ensures that the terpenes and THC levels reach their genetic maximum.
How to Automate Your VPD
Don’t calculate – Automate!
Calculating VPD manually every hour is impossible. The Vivosun GrowHub does the math for you in real-time. It monitors leaf temperature and humidity to keep your plants in the perfect transpiration zone automatically.
Manually calculating VPD is a nightmare. This is where smart technology comes in. The Vivosun Smart Grow System (with the GrowHub controller) monitors your environment in real-time and adjusts your fans automatically to keep you in the perfect VPD zone.
If you want to move from “decent” harvests to “professional” results, you need to understand one thing: Vapor Pressure Deficit (VPD).
Why Temperature & Humidity aren’t enough
Temperature tells you how warm it is. Humidity tells you how much water is in the air. But VPD tells you how your plants actually feel. It’s the difference between a plant that struggles to survive and one that thrives.
The Scientific Sweet Spot:
- Veg Phase: 0.8 – 1.1 kPa
- Flower Phase: 1.2 – 1.5 kPa
Automate your VPD
The Vivosun GrowHub calculates your VPD automatically and adjusts your ventilation in real-time. No more spreadsheets.
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