Ideal Humidity & VPD Levels for Every Growth Stage
|
Growth Stage |
Temp. Range |
Ideal Humidity (RH) |
Target VPD |
High Humidity Risk |
|---|---|---|---|---|
|
Seedling Stage 🌱 |
22–26°C |
65–75% RH |
0.4–0.8 kPa |
Mold & weak roots |
|
Vegetative Stage 🌿 |
24–28°C |
50–65% RH |
0.8–1.2 kPa |
Slow growth & poor transpiration |
|
Early Flowering 🌸 |
22–26°C |
45–55% RH |
1.0–1.4 kPa |
Bud rot & fungus risk |
|
Late Flowering / Fruiting 🍅 |
20–26°C |
40–50% RH |
1.2–1.5 kPa |
Flower damage & quality loss |
|
Harvest Stage ✂️ |
18–24°C |
35–45% RH |
1.3–1.6 kPa |
Slow drying & spoilage |

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