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SOUTHERN AGRICULTURAL PRODUCTS
Southern Ag Magnesium Sulfate
Southern Ag Magnesium Sulfate is an easy to use granular fertilizer that will help prevent and cure discoloration in palms trees and other labeled foliage due to Magnesium deficiency.
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Southern Ag Magnesium Sulfate Product Page
Min : 13.46 - Max : 47.87
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Price as of
11/04/25
11/04/25
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Southern Ag Magnesium Sulfate, manufactured by Southern Ag, will correct Magnesium deficiency in many plants such as palm trees, roses, vegetables and shrubs.
Formulated as a dry fertilizer, Southern Ag Magnesium Sulfate is an effective way to keep your palms, vegetables, rose bushes, and other labeled plants healthy year round.
Southern Ag Magnesium Sulfate can be used either as a curative or preventative solution.
Tools Needed
To use Southern Ag Magnesium Sulfate, you will need a hand spreader or push spreader.
How to Use
- Step 1: Determine how much Southern Ag Magnesium Sulfate to use by measuring the square footage of the treatment area. To do this, measure the length and width of the treatment area in feet then multiply them together (length X width = square footage). For palms, use 1/2 to 5 lbs of Southern Ag Magnesium Sulfate per tree depending on the tree height. For palms, use 1 lb of product for every 5 ft of height. (1/2 lb of product for palms shorter than 5 ft). For large trees and shrubs, use 1/2 to 1 lbs of product per 5 ft of canopy width. For roses, use 1-2 tablespoons of product per bush each time you fertilize. For lawns or large area treatment use, use 1/2 to 1 lb of product per 100 sq. ft. For vegetables, use 1/4 to 1 lb of product per 100 sq. ft.
- Step 2: Calibrate your spreader to the proper ratio then load the measured amount of Southern Ag Magnesium Sulfate into the spreader.
- Step 3: Take the measured amount of Southern Ag Magnesium Sulfate and apply evenly throughout the area and water in thoroughly to rinse any dry material off of foliage and down to the soil level.
- Step 4: Wait 1-2 weeks then remove any damaged leaves.
Where to Use
Southern Ag Magnesium Sulfate can be used for palms, shrubs, trees, roses, vegetables, and lawns.
When to Use
Southern Ag Magnesium Sulfate should be applied to established foliage before or after signs of a lack of magnesium appear.
Palm trees must be at least 5 feet in height at time of application.
Safety Information
Southern Ag Magnesium Sulfate is safe to use around children and pets when applied according to the product label instructions. Always wear the proper personal protective equipment (PPE) when applying this product.
Do not allow dry material to stay on foliage.
Keep out of reach of children and pets.
Special Considerations
Deficiencies such as this can also be a sign the pH of the solid is wrong.
Southern Ag Magnesium Sulfate may cause injury to tender plant parts.
| Availability | Online |
| Restricted Use | No |
| Shipping Restrictions | No Restrictions |
| Brand | SOUTHERN AGRICULTURAL PRODUCTS |
| Keith's Pro Tips | “Magnesium deficiencies in plants in both acid and alkaline soils ” |
| Product Drawbacks | Southern Ag Magnesium Sulfate cannot solve older magnesium deficiencies resulting in leaves remaining yellow and damaged. |
| Application Equipment | Hand Spreader |
| Application Methods | Granular Spreading |
| Active Ingredient | Magnesium 15.0% |
| Product Type | Fertilizer |
| Formulation | Granular |
| Application Rate | For palms, use 1/2 to 5 lbs of Southern Ag Magnesium Sulfate per tree depending on the tree height. For palms, use 1 lb of product for every 5 ft of height. (1/2 lb of product for palms shorter than 5 ft). For large trees and shrubs, use 1/2 to 1 lbs of product per 5 ft of canopy width. For roses, use 1-2 tablespoons of product per bush each time you fertilize. For lawns or large area treatment use, use 1/2 to 1 lb of product per 100 sq. ft. For vegetables, use 1/4 to 1 lb of product per 100 sq. ft. |
| Shelf Life | Southern Ag Magnesium Sulfate will last up to 3 years when stored in a cool, dry location. |
| Yield | One 5 lb bag of Southern Ag Magnesium Sulfate will cover 2,000 sq. ft. |
| Use Sites | Outdoors |
| Time to Kill | Southern Ag Magnesium Sulfate will start fertilizing soil and correcting deficiency within 1-2 weeks. |
| Comparable Products | Southern Ag Maganese Sulfate |
| EPA Registration # | N/A |
| Restricted Use | No |
|---|---|
| Availability | Online |
| Signal Word | CAUTION |
| Keith's Pro Tip | “Magnesium deficiencies in plants in both acid and alkaline soils ” |
| Time to Kill | Southern Ag Magnesium Sulfate will start fertilizing soil and correcting deficiency within 1-2 weeks. |
| Chemical Type | Fertilizer |
| Formulation | Granular |
| Application Methods | Granular Spreading |
| Product Drawbacks | Southern Ag Magnesium Sulfate cannot solve older magnesium deficiencies resulting in leaves remaining yellow and damaged. |
| Active Ingredient | Magnesium 15.0% |
| Application Equipment | Hand Spreader |
| Mix Rate | For palms, use 1/2 to 5 lbs of Southern Ag Magnesium Sulfate per tree depending on the tree height. For palms, use 1 lb of product for every 5 ft of height. (1/2 lb of product for palms shorter than 5 ft). For large trees and shrubs, use 1/2 to 1 lbs of product per 5 ft of canopy width. For roses, use 1-2 tablespoons of product per bush each time you fertilize. For lawns or large area treatment use, use 1/2 to 1 lb of product per 100 sq. ft. For vegetables, use 1/4 to 1 lb of product per 100 sq. ft. |
| Use Sites | Outdoors |
| Yield | One 5 lb bag of Southern Ag Magnesium Sulfate will cover 2,000 sq. ft. |
| EPA Registration No. | N/A |
| Shelf Life | Southern Ag Magnesium Sulfate will last up to 3 years when stored in a cool, dry location. |
| Comparable Products | Southern Ag Maganese Sulfate |
| Children or pets? | No |
| Property Characteristics | None |
*Price does not include freight. We guarantee our rate plus shipping will be less than anyone else's price.