Japanese Zelkova care — light, water, toxicity and hardiness
Japanese Zelkova (Zelkova serrata) wants full sun and a drink about every 7 days once established. It is hardy in USDA zones 5 to 8. It is safe to have around pets.
| scientific name | Zelkova serrata |
|---|---|
| family | Ulmaceae |
| category | tree |
| plant type | perennial |
| light | full sun |
| water cadence days | 7 |
| mature height cm | 2500 |
| min zone | 5 |
| max zone | 8 |
| frost tolerant | true |
| toxic to pets | false |
| toxic to humans | false |
| edible | false |
How often should I water Japanese Zelkova?
Vase shape like the lost American elm.
Who eats it
Palatable to browsing animals such as deer: low. Palatable to grazing animals: low. Palatable to people: no.
What it needs
Its shade tolerance is high. Its moisture use is medium. It wants at least about 20 inches of rain a year. Above roughly 70 inches of annual rain it struggles. It tolerates soil down to pH 6.0. It tolerates soil up to pH 6.9. Its fertility requirement is high. Adapted to coarse, sandy soils: yes. Adapted to medium, loamy soils: yes. Adapted to fine, clay soils: yes. It needs at least 110 frost-free days. Fire resistant: no. It has been recorded down to -33°F. It suppresses neighbours chemically: no.
How it grows
It grows as a single crown form. Its growth rate is slow. Its lifespan is long. It puts on most of its growth in spring and summer. It spreads by seed at a slow rate. It resprouts after damage: yes. Coppices: no. At maturity it reaches about 89.0 feet. By twenty years it is about 40 feet. Its roots go down at least 36 inches. Its shape is erect. It holds its leaves through winter: no.
What it looks like
It blooms in mid spring. The flowers are green. Conspicuous in flower: no. The foliage is dark green. The foliage texture is fine. In summer the canopy is moderate in porosity. In winter it is porous in porosity. Fall colour: yes. The fruit or seed is brown. Fruit begins in summer. Fruit finishes by fall. It fruits high. The fruit persists on the plant: no. The fruit is conspicuous: no.
Growing more of it
Propagated by seed: yes. Propagated by cuttings: no. Propagated by container: yes. Propagated by bare root: yes. Propagated by bulb: no. Propagated by corm: no. Propagated by tubers: no. Cold stratification required: yes. Seedling vigour is medium. Commercial availability: routinely available.
Source: Drafted from US Cooperative Extension horticulture guidance; pending HUMAN-05 review (issue 280) · ASPCA Toxic and Non-Toxic Plant List · 2026-09-02