Repotting guide

When & how to repot Parrotia persica (Parrotia persica)

Also called Persian Ironwood, Persian Witch Hazel.

More about parrotia persica

About Parrotia persica

Parrotia persica · also called Persian Ironwood, Persian Witch Hazel · flowering

Persian ironwood is a slow-growing deciduous tree prized for exfoliating bark and fiery autumn colour. Tiny red, petal-less flowers open on bare branches in late winter. It thrives in full sun, tolerates a range of soils once established, and is exceptionally hardy and pest-resistant, making a superb specimen for medium-sized gardens.

Mature size: Typically 8-12 m tall and 7-10 m wide after several decades; can reach 15 m on good sites. Multi-stem forms stay wider and lower.

How to tell parrotia persica needs repotting

Repotting on a calendar is less reliable than reading the plant. For parrotia persica, watch for these signs:

Thick roots out of the drainage holes, or circling the surface and lifting the plant.
The pot dries out unusually fast and parrotia persica wilts between waterings it used to shrug off.
The plant is visibly top-heavy and tips over easily.
Stalled growth and small new leaves over a full season — though with a big specimen, top-dressing is often the better first response before a full repot.

For the underlying biology of a pot-bound root system and why it stalls a plant, see our guide to spotting and fixing a root-bound plant.

How often to repot parrotia persica

Every 2–3 years; top-dress in the in-between years. Parrotia persica's growth habit — slow-growing deciduous tree, often multi-stemmed, with a broad, spreading and sometimes wide-domed crown. lower branches can sweep to the ground unless cleared; older trunks develop attractive flaking grey, green and tan bark. — sets the pace. Persian ironwood is a slow-growing deciduous tree prized for exfoliating bark and fiery autumn colour. Tiny red, petal-less flowers open on bare branches in late winter. It thrives in full sun, tolerates a range of soils once established, and is exceptionally hardy and pest-resistant, making a superb specimen for medium-sized gardens.

What size pot to step parrotia persica up to

Move up exactly one pot size. A heavy parrotia persica dropped into a vastly bigger pot sits in a reservoir of wet soil its roots cannot reach, which rots them and destabilises the plant. In the years between repots, lift off and replace the top 3–5 cm of soil (top-dressing) instead — it refreshes nutrients without the shock of a full repot.

Not sure of the exact diameter? Our pot size calculator takes the current pot and root spread and tells you the right next size — it deliberately recommends a single step up, never a big jump.

The best time of year to repot parrotia persica

Early spring, just as new growth restarts, is the ideal window for parrotia persica. The plant is moving into its strongest growth phase and re-roots into fresh soil quickly. Avoid repotting in winter dormancy or, for flowering plants, while it is in bud or bloom — recovery is slowest then and you risk dropping the flowers.

Step-by-step: repotting parrotia persica

Consider top-dressing first. If parrotia persica is not badly root-bound, scrape off and replace the top 3–5 cm of soil instead — far less shock for a big plant that hates moving.
Get help and one size up. For a full repot, choose a pot just one size larger. A heavy plant needs two people and a stable, free-draining pot.
Ease it out on its side. Lay the plant down, slide the pot off, and gently loosen the outer roots. Do not bare-root a mature specimen.
Repot at the same depth. Add fresh fertile, well-drained loam beneath and around the rootball, keeping the original soil line. Firm it so the trunk is stable and upright.
Water and leave it put. Water thoroughly, then leave parrotia persica in the same spot and light — moving and repotting at once is what makes it drop leaves.

Aftercare

Leave parrotia persica in exactly the same spot and light it was in before — moving and repotting at the same time is what makes a big specimen drop leaves. Water it in well, then let the top of the soil dry before watering again so the larger volume of fresh soil does not stay sodden. Do not fertilise for about 4 weeks — fresh mix already carries nutrients and feeding freshly disturbed roots scorches them.

The right soil mix for parrotia persica

Parrotia persica wants fertile, well-drained loam. Best in deep, moisture-retentive but free-draining soil. Tolerates clay and chalk and prefers neutral to slightly acid pH; richest autumn colour develops on acid ground. Avoid permanently waterlogged sites. Always use fresh mix when you repot — reusing old, broken-down soil reintroduces the compaction and poor drainage you are repotting to fix.

Repotting parrotia persica — frequently asked questions

How often should you repot parrotia persica?

Every 2–3 years; top-dress in the in-between years for parrotia persica. Fully repot parrotia persica only every 2–3 years; in the in-between years just top-dress the top 3–5 cm of soil. Step up one pot size in spring with fertile, well-drained loam. It is heavy and hates being moved, and a vastly oversized pot holds water against the roots and rots them.

What size pot does parrotia persica need?

When is the best time of year to repot parrotia persica?

Should you top-dress or fully repot parrotia persica?

For a big, heavy parrotia persica, top-dressing — replacing the top 3–5 cm of soil — is the gentler option most years, with a full repot only every 2–3 years. A mature specimen sulks and drops leaves when fully repotted, so do it as rarely as the roots allow.

Should you fertilise parrotia persica after repotting?

Not immediately. Wait about 4 weeks after repotting parrotia persica. Fresh mix already contains nutrients, and feeding freshly cut or disturbed roots burns them. Resume your normal feeding routine once you see new growth.