Fix Magnesium Deficiency in Tomatoes with MgSO4
- Share
- publisher
- MgSO4 Group Limited
- Issue Time
- Aug 12,2026
Summary
Interveinal chlorosis in tomatoes? MgSO4 foliar and soil fixes that work.

Spotting Magnesium Deficiency in Tomatoes
magnesium deficiency tomatoes shows as yellowing between the veins on older, lower leaves while veins stay green. Because magnesium is mobile, the plant moves it to new growth, so symptoms appear first at the bottom.
Why Tomatoes Need Magnesium
Magnesium is the core of chlorophyll and activates enzymes for photosynthesis and fruit set. Without it, magnesium sulfate for tomatoes programs cannot reach full yield or colour.
Soil vs Foliar Correction
For quick recovery, a MgSO4 foliar spray at 1–2% delivers magnesium straight to leaves. For lasting correction, base-apply magnesium sulphate fertilizer so the soil reserve is rebuilt.
magnesium sulfate heptahydrate for tomato correction — view product: https://www.mgso4.com/pid18135906/Magnesium-Sulphate-Heptahydrate-99-Epsom-Salt-0-1-1mm-crystal-powder.htm
Using Epsom Salt on Tomato Plants
epsom salt tomato plants treatments are simply magnesium sulfate applied to the root zone or foliage. Dissolve fully and avoid over-concentration to prevent leaf scorch.
Dosage Guidelines
Foliar: 2–5 kg per hectare of MgSO4 in sufficient water, repeated at 10–14 day intervals. Soil: 10–25 kg per hectare depending on test results and crop stage.
Timing for Best Results
Apply at flowering and early fruit set, when demand peaks. Combine with irrigation to move magnesium into the root zone.
Agriculture Magnesium Sulphate Quality
Use a clean agriculture magnesium sulphate grade with low heavy metals. MgSO4 Group Limited supplies heptahydrate suitable for open-field and greenhouse tomatoes.
A Simple Tomato Program
Test soil, base-apply MgSO4, then foliar top up at flowering. Track leaf colour and fruit set to confirm response within two weeks.

magnesium sulfate fertilizer for vegetable crops
Need the right grade for your tomato crop? Request a specification sheet from MgSO4 Group Limited.
