Old Cobblers Farm™ Wicked Organics Magnesium Sulfate

Premium Epsom Salt (MgSO₄·7H₂O)

Bring your plants back to vibrant health with Old Cobblers Farm™ Wicked Organics Magnesium Sulfate, a high-quality, water-soluble source of magnesium (9.8%) and sulfur (12.9%) that delivers fast, effective correction of nutrient deficiencies. If you’ve ever typed “how to fix magnesium deficiency in tomato plants,” “best Epsom salt fertilizer for roses,” or “organic sulfur supplement for plants,” this is the go-to solution trusted by gardeners, farmers, and hobbyists alike.

Guaranteed Analysis & Key Nutrients

Magnesium (Mg): 9.8% Minimum – essential for chlorophyll production, green leaves, and efficient photosynthesis.

Sulfur (S): 12.9% Minimum – necessary for amino acids, enzyme functions, and overall healthy growth.

Chemical formula: MgSO₄·7H₂O (Epsom salt) – highly soluble, ideal for foliar feeding, soil amendment, and fertigation.

Why Magnesium and Sulfur Matter

Magnesium plays a critical role in the green pigment of leaves; deficiency commonly shows up as interveinal chlorosis (yellowing between veins) especially in older leaves. 

Sulfur supports nutrient uptake, protein formation, and helps plants resist stress and disease.

Soils with high potassium, sandy texture, or excessive rainfall will often lose magnesium easily, making supplementation with Epsom salt type fertilizers necessary. 

Perfect For These Uses

Correcting magnesium deficiency in vegetables, fruit trees, and ornamentals — when leaves turn yellow between veins, you need “magnesium sulfate fertilizer for plants” or “Epsom salt treatment for magnesium deficiency.”

Foliar sprays and soil drenches — for rapid uptake, especially for tomatoes, peppers, roses, blueberries, and other magnesium-hungry plants.

Container gardening — pots tend to deplete magnesium more quickly; this fertilizer helps maintain balance in potted citrus, ornamentals, herbs.

Organic farming, specialty crops & soil amendments — meets organic standards; great when looking for an OMRI listed magnesium source or “organic sulfur fertilizer.”

Key Benefits You’ll See

Greener, healthier leaves, especially for plants showing symptoms of magnesium deficiency like yellowing older foliage. 

Better photosynthesis, meaning more energy for flowering, fruiting, and growth.

Improved uptake of other nutrients – balanced nutrition means plants can use nitrogen, phosphorus, potassium more effectively.

Faster recovery from stresses caused by soil imbalance, high potassium levels, or nutrient depletion.

How to Use & Application Tips

Test soil first: Before applying, check soil magnesium and sulfur levels to avoid over-application.

Foliar spray: Mix a solution (often 1-2 tablespoons of magnesium sulfate per gallon of water, depending on crop) and spray onto leaves early morning or late afternoon when stomata are open.

Soil drench or root zone amendment: Apply around root zone for longer-term correction. For vegetable rows or potted plants, watering in after application helps.

Frequency: Use when deficiency is detected; if soil remains deficient, occasional supplementation during active growth may be beneficial.

Avoid mixing with high-potassium fertilizers at the same time if potassium is already high, to prevent antagonism of magnesium uptake.

Why Old Cobblers Farm Wicked Organics Magnesium Sulfate Stands Out

OMRI listed / organic standard compliant — safe for certified organic production.

High purity, carefully formulated so that plants absorb magnesium and sulfur without risk of overfeeding.

Versatile: can be used on vegetables, ornamentals, trees, lawns, container plants.