Why does my soil become hydrophobic?
Written by
Nguyen Minh
Reviewed by
Prof. Martin Thorne, Ph.D.Hydrophobic soil creates a waxy layer that causes water to repel, rather than be absorbed. It develops in dry conditions when organic material decomposes and interacts with the hydrophobic compounds. I noticed this in my Utah garden during droughts, when the water would bead on top rather than soaking in.
Natural Wetting Agents
- Yucca extract breaks surface tension instantly
- Soapberry solutions create safe penetration
- Liquid humic acids restore soil chemistry
- Apply every 2 weeks during dry spells
Soil Structure Repair
- Incorporate compost to dilute waxes
- Add biochar to create absorption sites
- Mix vermiculite for immediate improvement
- Till amendments 4-6 inches deep
Watering Techniques
- Water slowly in multiple short sessions
- Use soaker hoses for gradual saturation
- Apply water at cooler times of day
- Maintain consistent moisture after treatment
Aerate compacted areas to prepare the ground before applying other treatments. I use a garden fork and poke holes within impacted areas. This way, solutions can penetrate deeper. Finish with yucca extract according to the label instructions. Within minutes, you will soon notice that the water begins to soak in, rather than running off.
Prevent recurrence through soil organic matter. I use compost every year, as well as straw mulch during dry times. Never let your soil bake out completely. These practices will help prevent the formation of hydrophobic compounds in the future. Your soil will be able to accept water all year long.
One method you can use for testing hydrophobia is the water droplet method. Place a few drops of the solution on the soil's surface. If they bead up for more than 10 seconds, you have hydrophobic soil, and a treatment is required. I check the soil once a month during the summer period. This surrogate test can help identify hydrophobia issues early, before the plant(s) show symptoms of stress.
Read the full article: 7 Proven Water Retention Soil Methods
