Zeolite as a Soil Amendment for Bonsai and Houseplants

Pros

• Absorbs several times its weight in water, releasing slowly to roots.
• Porosity retains air pockets, helping prevent root rot.

Cons

• No nutrient value (same as perlite, vermiculite, sand).
• Availability and cost may be issues.

Verdict

Should work well as an amendment; no major drawbacks known.