Watering. Substrate moisture and probe placement + nutrients
Sativaclub14started grow question 4mo ago
Hi everyone
I'm on my first try with two sfg og auto and two-skywalker-haze. My question is on watering. I've been monitoring substrate temps, moisture levels and ec levels etc. Should I dry back to 25% and if so should the probe be in the top of the pot or bottom.....or middle?
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wolfvbanswered grow question 4mo ago
Salam Sativaclub14! ๐ Welcome to the high-tech side of growing! ๐ Using data on your first run is very impressive. That is true Modern Engineering! ๐ ๏ธ
1. The Probe Location: ๐
You want the "Goldilocks Zone."
Top: Dries out too fast (gives you false panic). ๐ต
Bottom: Stays wet/salty the longest (gives you false security). ๐
The Fix: Insert the probe about 1/3 to 1/2 way down into the pot. This tells you what the main root ball is actually drinking.
2. Drybacks (The Magic): ๐
Yes! Drying back is crucial. As the water leaves, fresh Oxygen enters the substrate. Roots need oxygen to breathe and expand.
Target: 25-30% moisture is a great target to trigger your next watering (assuming you are in soil/mix).
The Warning: As moisture drops, EC (salt concentration) rises. If you let it get too dry (like Lift the Pot! ๐๏ธโโ๏ธ
If the sensor says 25% and the pot feels light as a feather, give her a drink!
Happy Growing! ๐