Should the Rhizomes Be Exposed?

Rhizomes must be left exposed to allow the sun to bake and create the flower cells to ensure good flowering the following year. ... This will stimulate leaf growth and cause the rhizome to rot.

Should you cover rhizomes?

The rhizomes of these plants should be partially exposed to the elements, or thinly covered with soil in hot climates. If they're buried too deeply, they won't do well.

Should ZZ rhizomes be exposed?

Repot if necessary to encourage healthy growth. When potting your ZZ plant, fill the pot to the level of the base of the stems, so that the rhizome is just covered with soil. Avoid potting too deeply – Leaving a little root bulb exposed is better than burying the stems, as this can promote stem rot.