How to Use Vinegar and Water to Flush Salt Build Up Out of Soil

Fertilizers, although vital for the health of our plants, leave behind residues that may eventually build up and harm them. Salt is one residue of fertilizer that, especially in potted plant soil, can quickly build up and actually leach the water from our plants. The end result is a plant that is dehydrated or weakened. Horticulturists at Texas A&M University claim that when a plant becomes weakened by excess salt in the soil, it is more prone to root rot. One way to remedy this situation in your potted plants is by flushing the soil with vinegar and water.

Things You'll Need

• Water
• Vinegar

Instructions

1. Remove any surface soil that contains salt. You will see the the white, powdery residue right on the surface.

2. Place the plant in the sink or outside. Run water lightly over the soil, allowing the plant to remain under the water stream until it is drenched. After the pot drains, repeat the procedure.

3. Mix 1/2 tsp. of white vinegar to 1 qt. of water and pour it into the soil, allowing it to drain from the bottom of the pot. Horticultural consultant and gardening columnist Bob Chapman (Orchard Supply) claims that the vinegar will neutralize the salts and help to keep the soil salt-free.

4. Flood the soil again with clear water. Horticulturists at Texas A&M suggest using twice the volume of the pot as a guide as to how much water to use when leaching the soil. For example, since a 6-inch pot will hold 10 cups of water, use 20 cups of water to leach the soil.

Tips & Warnings

• The leaching procedure should be done every four to six months, preferably prior to fertilizing the plant.

References

• Orchard Supply Hardware: Caring for Houseplants in Winter
• Texas A&M University: Houseplants