How to Propagate a ZZ Plant? Detailed Guide to Common Propagation Methods
The ZZ plant (Zamioculcas zamiifolia) is a herbaceous plant native to tropical Africa and belonging to the Araceae family. It grows in a tropical savanna climate and prefers sunny, warmer environments. Its propagation methods share similarities with those of other flowers and plants, mainly including division propagation and cutting propagation.
Division Propagation of the ZZ Plant
In April, when the outdoor temperature reaches above 18°C, remove the large ZZ plant from its pot, shake off most of the old soil, pull it apart at the weak points where the tubers join, and apply sulfur powder or plant ash to the wounds, then replant in separate pots. Be careful not to bury it too deep when planting; burying the top of the tuber 1.5-2 cm below the soil surface is sufficient.
In addition, because ZZ plant tubers have dormant buds, a large single tuber can be cut into small pieces each with 2-3 dormant buds. After the wounds have dried and healed, first bury and plant them in slightly moist fine sand, and once the cut small tubers have grown into independent plants, pot them up for planting.
Cutting Propagation of the ZZ Plant
Cuttings can use a single small leaf, a section of leaf rachis with 2 leaves attached, or a bare section of leaf rachis. In terms of rooting results, cuttings made from a leaf rachis with leaves attached root faster and have a higher sprouting rate, and more easily form larger tubers. Insert a single leaf into a mixed substrate of river sand and vermiculite; after 10-14 days, a small rooted bulbous stem forms at the leaf base, and after 2-3 months of cultivation it can grow into a small plant, but under normal conditions the seedling success rate is not high.
If a leaf rachis or a leaf rachis with leaves is used as the cutting, the substrate can be ordinary fine sand, or a substrate mixed from peat soil, perlite and river sand in a 3:1:1 ratio. Insert the cutting to a depth of 1/3 to 1/2 of the cutting length, leaving only the leaves above the substrate. Spray thoroughly with water and place in a shaded spot, maintaining an ambient temperature of 25°C-27°C. Depending on how dry or moist the substrate is, mist the leaf surface 1-2 times a day, keeping the substrate slightly moist; it must never be overly wet, otherwise the cutting will rot and the propagation will fail.
When the cutting has formed a certain root system, the middle of the root gradually swells to form a small bulbous tuber, and the tuber gradually enlarges. Some of the more tender cutting leaves, after being potted, may turn yellow and die due to high temperatures or poor water management, but the tuber can survive. Old mature leaves and cuttings with a whole leaf stalk can also remain green and vigorous. A small number of tubers can sprout and grow new leaves in the same year, but their growth vigor is weak and growth is slow; the following year the tuber will grow stout new shoots and grow normally.