Establish Crop-Stage EC and pH Targets
1 hourDefine EC and pH setpoints for seedling, vegetative, and flowering stages; calibrate meters with fresh buffer solutions.
Field context
This workflow is part of 4 niche fields
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Define EC and pH setpoints for seedling, vegetative, and flowering stages; calibrate meters with fresh buffer solutions.
Mix A/B stock concentrates, calculate dilution ratios for target EC at current reservoir volume, label with date and batch.
Record morning readings before lights-on, top off with pH-adjusted water, note EC drift direction for uptake diagnosis.
Drain reservoir at calculated interval, scrub biofilm, refill at stage-appropriate EC, verify pH after 30-minute equilibration.
Sets and tracks EC targets through each crop growth stage.
Calculates acid or base dose for daily pH correction in reservoir.
Maintains dilution chart from stock concentrate to working solution.
Triggers full reservoir reset when EC drift or age exceeds thresholds.
Nutrient Stage Targets
| Stage | EC mS/cm | pH |
|---|---|---|
| Seedling | 0.8–1.2 | 5.8–6.0 |
| Vegetative | 1.4–2.0 | 5.8–6.2 |
| Flowering | 2.0–2.8 | 6.0–6.5 |
| Flush | 0.0–0.4 | 6.0 |
Adjust pH before adding nutrients — pH drift after mixing wastes expensive inputs.
Keep reservoir 65–70°F — warmer water holds less oxygen and invites root rot.
Drip loops on all cords entering reservoirs and GFCI on every outlet.