“Sodium polyacrylate helps plants grow? “

You may get this idea after watch some “horticulture tips” or video in the Internet. They may tell you “sodium polyacrylate is such a powerful water absorbing material which can increase soil’s water retention capacity.”

How’s the result about sodium polyacrylate for plants?

The result is that sodium polyacrylate WON’T help plants grow well at all.

And you will find sodium polyacrylate is melted or disappeared in soil. What the worst is that soil become sticky which is killing plants by isolating oxygen.

Why doesn’t it work?

As the main liquid absorption material in diaper, sodium polyacrylate has two special points:

  • As urine cause baby red buttock, sodium polyacrylate locks water (urine) strongly. (That’s why sodium polyacrylate no help for plants.)
  • Consider environmental protection factors, the sodium polyacrylate in diaper would be melted & resolved quickly. (That’s why sodium polyacrylate disappeared and soil become sticky.)

Potassium Polyacrylate

Is there a material can absorb and release water for plants?

Yes. We can use another type SAP which focus on agriculture: potassium polyacrylate.

This kind of SAP is different from others:

  • Releasing water. It can release water to plants when it’s drought;
  • Long effective period. It’s available in soil for a long time (months);
  • Repeatedly working. After releasing water, it could absorb water for plants again.
Types of SAP Use Differences
Potassium Polyacrylate to retaining water As a water retaining agent, it will absorb & release water in soil for months.
Sodium Polyacrylate to absorb urine As a water absorbing material, its water gel will be never to release water and decomposed quickly.
Guide to Super Absorbent Polymer