What could cause white powder in soil?

Answer by  summeroeth (88)

White powder in soil can be caused by excess salt content in the soil. Be sure to check the salt content of your fertilizer. Do not over fertilize. In addition, if you are using tap water then there is a change you water is hard and contains too much salt. In such a case, water with distilled or purified water.

Answer by  sweets (47)

did you recently fertilize your flowers or plants? if so the white powder could be salt residue from fertilizers used. try giving them plain water for a while and see if the white powder disappears.

Answer by  Latin4 (11170)

It sounds like to have moist soil and the salt it rising to the top. If you are watering your plants or grass wait a few days until the soil dries out. Scrap away the salt. Then water again or let the rain do its job.

Answer by  Bryan (77)

Sounds like you are having a fungus problem , or look into bacteria growth coming out of the soil there are not to many things that could make this happen

Answer by  worker2271 (7)

Salt content could cause a white residue on top of your soil. If you are using fertilizer try watering without for a few days so see if it washes away.