Using Epsom salt citrus trees get a fast boost of magnesium sulfate that helps them grow dark green leaves. This cheap garden fix has helped citrus growers for decades. Your tree needs magnesium to make chlorophyll and keep citrus leaf health strong through the growing season.
I tested Epsom salt on my Valencia orange last spring after seeing yellow patches between leaf veins. The foliar spray worked fast. Within two to three weeks, those pale leaves turned a deep green that matched the healthy parts of my tree.
My neighbor tried the same treatment on her Meyer lemon with similar results. She had been worried about the yellowing for months before we figured out the problem. A simple Epsom salt spray fixed what looked like a dying tree.
Magnesium for citrus trees plays a key role in plant health. This mineral sits at the center of every chlorophyll molecule. Without enough of it, leaves turn pale and cannot trap sunlight well. Your tree then struggles to make the sugars it needs for growth and fruit.
The rates for Epsom salt are easy to follow. Mix 1 tablespoon per gallon of water for foliar sprays. For soil feeding, spread 1 cup of dry crystals around the drip line. Apply these treatments 2-4 times from spring through early fall.
Foliar sprays give the fastest results. Leaves soak up magnesium right through their surface. Spray early morning or late afternoon when temps stay below 85°F (29°C) to stop leaf burn. Coat both sides of leaves until drops run off.
Soil treatments work slower but their effects last longer. Water the crystals in right after spreading them. This dissolves the salt and moves it down to the roots. Clay soils may need extra water to prevent buildup near the surface.
Epsom salt is just one of many citrus tree supplements you can use. It only fixes low magnesium levels though. Yellow leaves might also mean iron shortage, lack of nitrogen, or root rot. A soil test for $15-25 tells you which nutrient your tree needs most.
Chelated magnesium works better if your soil pH sits above 7.0. Regular Epsom salt becomes hard for roots to absorb in alkaline dirt. The chelated form stays available to plants even in tough soil conditions.
For most home growers with normal soil, Epsom salt works great. It costs just a few dollars and you can find it at any garden store or pharmacy. Start with the foliar spray for quick results and add soil treatments for lasting citrus leaf health all season long.
Read the full article: Citrus Tree Care: Essential Guide for Growers
