Common crops affected
What is it?
Magnesium is a mobile nutrient and the core atom of chlorophyll. When short, the plant moves it from older leaves to new growth, so the classic interveinal yellowing appears on the lower, older leaves first. Deficiency is common in sandy, acidic, or high-potassium soils, where magnesium is low or its uptake is blocked.
How to identify it
- Yellowing between the veins of older leaves, with veins remaining green
- Yellowed areas that may turn brown or develop reddish/purple tints
- Symptoms starting low and older and progressing upward
- Common in sandy, acidic, or high-potassium soils
Damage and how it spreads
Because magnesium is central to chlorophyll, deficiency reduces photosynthesis, vigor, and yield, and severe cases cause leaf death. High potassium or acidic, sandy soils can induce it even when total magnesium isn't extremely low. Correcting it restores green color and productivity.
How to control it
- Confirm the interveinal pattern on older leaves; a soil or tissue test helps.
- Apply soluble magnesium for a quick response, foliar or to the root zone.
- Address soil pH and avoid excessive potassium that blocks uptake.
- Keep overall nutrition balanced.
Recommended Vegalab solution: Magnesium Boost
Vegalab Magnesium Boost is an advanced soluble magnesium designed to correct deficiency quickly and restore chlorophyll production. For broader micronutrient support alongside magnesium, Micro Boost supplies essential trace elements, and Balance Boost helps remediate and rebalance soils where high potassium or acidity is blocking uptake. Apply per label.
| Role | Product | Use |
|---|---|---|
| Primary correction | Magnesium Boost | Soluble magnesium correction |
| Companion / broader pressure | Micro Boost | Micronutrient correction |
| Plant support | Balance Boost | Soil remediation & balancing |
Preventing it next season
Maintain balanced soil nutrition and pH, avoid excessive potassium, and monitor older leaves on sandy or acidic soils. Magnesium Boost makes it easy to top up magnesium when demand is high.
Claims and product availability vary by jurisdiction. Always read and follow the product label.