Hydroponic lettuce nutrient targets
| Setting | Target | Note |
|---|---|---|
| EC | 0.8 - 1.2 | Lower end for seedlings and warm water |
| pH | 5.5 - 6.0 | Stay in range; do not chase exact |
| Formula type | One-part or two-part (A+B) | Complete, with micronutrients |
| Nutrient bias | Nitrogen-forward | Leafy growth, not flowering |
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Lettuce is one of the easiest hydroponic crops to feed because it is a light, fast feeder. As a quick answer: use any complete leafy-green or all-purpose hydroponic nutrient, mixed to a low EC of 0.8 to 1.2, and keep pH at 5.5 to 6.0. You do not need a special “lettuce” product. This is the crop-specific companion to our general best hydroponic nutrients guide.
What lettuce actually needs
Lettuce grows fast and leafy, so it wants a complete, nitrogen-forward nutrient with full micronutrients, run weak. The classic beginner mistake is feeding lettuce like a tomato: too strong an EC makes leaves bitter and triggers tip burn. Mix to the low end and lettuce rewards you with crisp, mild leaves.
Reliable options that home growers use for lettuce include the General Hydroponics Flora series, Masterblend (its tomato formula is a long-standing favourite for leafy greens), and FoxFarm liquid lines.
Browse hydroponic lettuce nutrients on Amazon
Get the numbers right, not the brand
For lettuce, the exact brand matters far less than mixing to target:
- Mix to an EC of 0.8 to 1.2 — the full targets by crop are in the hydroponic lettuce EC and pH chart.
- Set pH to 5.5 to 6.0 after adding nutrients.
- Add parts separately and mix correctly, per how to mix hydroponic nutrients.
One-part vs two-part for lettuce
A one-part formula is the simplest and is plenty for lettuce. A two-part (A + B) gives a little more control but is not necessary for a leafy crop. Save three-part systems for fruiting crops; lettuce does not need the extra steps. For the full breakdown of formula types across crops, see the general nutrients guide.
Underfeed rather than overfeed
With lettuce, weaker is safer. If growth is slow but leaves are healthy, nudge the EC up slightly rather than jumping to a strong mix. Overfeeding shows up as bitter leaves and burnt tips long before underfeeding causes real harm.
Use your lettuce nutrients with these guides
These guides cover the general nutrient options, the exact EC and pH targets, and how to mix to your number.
Common questions
What are the best hydroponic nutrients for lettuce?
A complete, water-culture nutrient with full micronutrients, run at a low EC of about 0.8 to 1.2. Well-regarded options include the General Hydroponics Flora series, Masterblend Tomato formula (widely used for lettuce), and FoxFarm liquid lines. Lettuce is a light feeder, so any complete formula mixed weak works well.
What EC and pH does hydroponic lettuce need?
Aim for an EC of 0.8 to 1.2 and a pH of 5.5 to 6.0. Lettuce grown too strong turns bitter and can suffer tip burn, so mix to the lower end, especially for seedlings and in warm water.
Can I use general-purpose hydroponic nutrients for lettuce?
Yes. A general complete formula like the ones in our best hydroponic nutrients guide grows excellent lettuce; just mix it to lettuce's low EC rather than full label strength, which is aimed at hungrier fruiting crops.
Do I need special "lettuce" nutrients?
No. There is rarely a need for a lettuce-specific bottle. A complete leafy-green or all-purpose hydroponic nutrient, mixed weak and kept in the right pH range, is all lettuce needs.
Related guides
Best hydroponic nutrients for herbs and greens
Leafy greens and herbs do not need exotic nutrients, just a complete, balanced formula with the right micronutrients. Here is what to look for and which type to pick.
How to mix hydroponic nutrients: a beginner guide
Mixing hydroponic nutrients is simple once you know the order: water first, nutrients separately, measure EC, then adjust pH last. Here is the step-by-step.
Hydroponic EC chart by crop (not just lettuce)
One reference chart for the EC and pH targets of common hydroponic crops, from leafy greens and herbs to fruiting plants, plus how to use the numbers safely.