ZZ plant
What look like stems on a ZZ plant (Zamioculcas zamiifolia) are actually compound leaves. Its true storage organ is hidden in the potting mix: a tuberous rhizome stores water for dry spells.
Leaf and rhizome structure
What you see above the potting mix are not stems but compound, odd-pinnate leaves. They emerge from an underground tuberous rhizome and are supported by thick, succulent leaf stalks.
The leaf stalks usually reach 45-60 cm, occasionally up to 1 m. Each compound leaf may have 6-12 pairs of leaflets measuring 7-15 cm long; they are firm and smooth, with glossy upper surfaces and duller undersides.
The rhizome acts as a storage organ, accumulating water and nutrients. This is why the plant tolerates a short dry spell better than constantly wet potting mix.
Origin and adaptation to drought
The species is native to eastern Africa: Kenya, Tanzania, Zimbabwe. It evolved in conditions where wet periods alternate with dry spells, so excess water is more dangerous to it than a break from watering.
The ZZ plant is considered evergreen, but it can shed its leaves during drought. Before a leaf dies, some of its sap flows back into the rhizome, and a brittle zone forms on the leaf stalk where the leaf eventually breaks off.
The Ukrainian name meaning "dollar tree" is a trade and household name, not a botanical one. It arose from the glossy dark green leaflets and associations with financial symbolism, but does not describe the plant's properties.
Light and placement indoors
Bright indirect light is best. In this light, leaves develop more readily and have a rich green color.
The plant will not necessarily die in a shaded spot, but growth slows noticeably. If light is insufficient during active growth, the leaf stalks may stretch and produce few leaflets.
- provide bright indirect light near a window
- protect from direct midday sun
- rotate the pot for even growth
- avoid deep shade during active growth
- choose a stable spot without cold drafts
Watering and potting mix
Water after the potting mix dries out, not on a schedule. The tuberous rhizome already holds a reserve of water, so frequent watering without allowing the mix to dry out creates a risk of rot.
The potting mix should be loose, moisture-retentive, and airy. Water sitting in the pot and compacted mix that leaves the roots without air for long periods are dangerous to this plant.
| Condition | What happens |
|---|---|
| moderate watering after the mix dries out | the rhizome uses its water reserves without becoming waterlogged |
| constantly wet potting mix | the risk of tuber and root rot increases |
| a short dry spell | the plant may lose some of its visual appeal, but often recovers |
Flowering and active growth
An aroid inflorescence is not a single large flower, but a spadix with a spathe. The ZZ plant has a small spadix, 5-7 cm long, bearing tiny white, pink, or cream flowers.
The flower stalks emerge from the tuber, are shorter than the leaf stalks, and often droop. Flowering is uncommon indoors, and seed propagation is rarely used because seed set is even less common.
During active growth, the optimal temperature range is +18…+26 °C. The plant tolerates a brief drop to +15 °C, but cool conditions combined with wet potting mix increase the risk of rot.
Propagation and repotting
In cultivation, the plant is propagated vegetatively by dividing the tubers or rooting leaves. Division works better when a section of rhizome already has a growth bud; sections without buds rarely produce shoots.
Leaf cuttings are rooted in fine-grade perlite, vermiculite, or water. The process is slow: a storage organ forms first, and only then does new aboveground growth appear.
Wide, shallow pots are suitable for repotting. The underground organs grow vigorously, and an expanding tuber can sometimes damage the pot.
Why leaves turn yellow
Yellowing is often linked to root rot, especially when the potting mix stays wet for a long time. In this situation, it is not just the foliage that suffers: the tubers and roots can rot too.
Another cause is natural aging or a response to drought. The plant may shed some leaves while conserving resources in the rhizome, and remnants of old leaf stalks sometimes persist for several years.
- constantly waterlogged potting mix
- water left standing in the saucer
- cool conditions after watering
- insufficient light during growth
- natural aging of older leaves
- Light
- bright indirect light
- Temperature
- +18…+26 °C
- Watering
- after the potting mix dries out
- Soil
- loose, airy
- Difficulty
- easy
- Cats and dogs
- toxic
- Size indoors
- 45-60 cm, occasionally 1 m
- Leaves indoors
- 7-15 cm
- Native range
- eastern Africa: Kenya, Tanzania, Zimbabwe
Care
The ZZ plant is adapted to dry spells between rains, so indoors it does best with restrained watering and a well-lit spot without overheating from direct sun. The main care risk is wet, heavy potting mix.
- Light
- Provide bright indirect light. In shade, growth slows, and the leaf stalks may stretch during active growth. Filter harsh direct sun.
- Temperature
- Keep at +18…+26 °C. This is the range for growth. The plant tolerates a brief drop to +15 °C, but cool conditions combined with wet potting mix put the rhizome at risk.
- Watering
- Water after the potting mix dries out. The tuber stores water, so overwatering is more harmful than a short dry spell. Do not leave water in the saucer.
- Soil
- Use a loose, airy potting mix. The mix should let air through and not hold water around the tubers. A dense mix increases the risk of rot.
- Leaves
- Wipe dust off the leaves. The firm, glossy leaflets collect dust. Misting is an option, but high humidity is not essential.
- Repotting
- Choose a wide, shallow pot. The underground organs grow vigorously; an expanding tuber can press against the sides of the pot. Repot carefully because the sap is toxic.
Botany
2 ill.- Family
- Araceae
- Genus
- Zamioculcas
- Species
- Zamioculcas zamiifolia
- Author and year
- (G.Lodd.) Engl.
- Life form
- succulent
The ZZ plant belongs to the family Araceae and is a member of the monotypic genus Zamioculcas. The current species name is Zamioculcas zamiifolia; the genus is recognized as having one main species, while several older names are treated as synonyms or assigned to other genera.
The underground part is a rounded, tuberous rhizome with thick roots. The aboveground "shoots" are actually compound leaves with fleshy leaf stalks and pairs of firm, oval leaflets.
The inflorescence has the typical aroid structure: a spadix with a spathe. It is inconspicuous and develops near the base of the plant; after flowering, the spadix turns brown.
How it differs from similar plants
Peace lily Spathiphyllum wallisii
- Spathiphyllum has a conspicuous white spathe beside the spadix and a clump of basal leaves, while the ZZ plant has compound leaves above the potting mix that resemble stems.
Monstera Monstera deliciosa
- Monstera is easy to distinguish by its climbing growth on a support and large, split leaves, while the ZZ plant has upright compound leaves and no climbing habit.
Frequently asked questions
- Why are the leaves turning yellow?
- Most often because of overwatering and rhizome rot. Leaves can also turn yellow with age or after drought.
- Can I keep it at home if I have a cat?
- No, the plant is toxic to cats and dogs. Its sap can irritate mucous membranes, so chewing the leaves is dangerous.
- How often should I water?
- Water after the potting mix dries out. Keeping the pot constantly moist is dangerous for this plant.
- Will it grow in shade?
- Yes, but growth will be slower. Bright indirect light is better for developing strong new leaves.
- How do I propagate it?
- Use leaf cuttings or divide the tubers. A section of rhizome must have a growth bud, or it may not produce shoots.
