Mulch on Indoor Plants: Decorative Only—Remove for Better Care

Question

Hi Will, bought two plants: dwarf schefflera in 11" pot (~16" tall) and "threadleaf" in 11" pot (~2 ft tall). Both need moderate to bright indirect light, thorough watering when soil dry. Both pots had ~1.5" mulch covering top. What's the reason? Winter protection? Now indoors, should I remove mulch? It makes checking soil moisture hard (I stick finger in to check top 2"). Should I replace with soil? What kind? Need repotting?

Farah

Answer

Hi Farah, "threadleaf" describes many species—comments below apply only to Schefflera arboricola. Schefflera needs lots of bright indirect sun all day—very close to north window, within few feet of others. Allowing top 1-2" to dry before watering is correct.

Mulch on indoor plants is purely decorative—remove it, especially if it helps gauge soil moisture. Don't replace with soil and don't repot.

If you can't ID the other plant, post a photo here or email to wcreed@HorticulturalHelp.com.

Follow-up: Other plant is Dizygotheca elegantissima (False Aralia) in 11" pot, ~2 ft tall.

Unless 6+ plants in pot, False Aralia may be overpotted in 11". Light needs similar to Schefflera. Very sensitive to over/underwatering. If pot size appropriate, water when top inch feels dry or if wilting. Keep away from radiators/heaters. Prefers high humidity—use pebble tray if no humidifier. Watch for spider mites (love this plant). Pretty but challenging—why not seen often.

Second follow-up: ~5 stems in Aralia pot. Near humidifier (2 ft) and stained glass window (1 ft). Adequate? How prevent spider mites? Soapy water misting—what soap/concentration?

Stained glass likely filters too much light—varies with color darkness/thickness, but assume worst and place elsewhere. Keeping plant healthy best prevents pests. Spider mites thrive in hot dry air—cool temps and humidity work better than misting. Soap in mist doesn't help prevention. Focus on proper light/water, visually check monthly.

Will Creed, Interior Landscaper
Horticultural Help, NYC