Repotting guide

When & how to repot Black Rose Aeonium (Aeonium arboreum 'Zwartkop')

Also called Black Rose, Schwarzkopf.

More about black rose aeonium

About Black Rose Aeonium

Aeonium arboreum 'Zwartkop' · also called Black Rose, Schwarzkopf · houseplant

Black rose aeonium 'Zwartkop' is a branching tree-like succulent topped with large flat rosettes of glossy leaves that turn near-black in strong sun and deep burgundy-green in shade. A winter grower that rests in summer heat, it makes a dramatic architectural houseplant. It is generally considered non-toxic, though not individually ASPCA-listed.

Mature size: Reaches roughly 60-90 cm tall (occasionally taller) with rosettes about 15-20 cm across. Branches with age into a small candelabra-like shrub.

Watch for — Reversion to green and etiolation: Insufficient sun loses the black colouring and stretches the stems. Provide strong direct light to keep rosettes dark and compact.

How to tell black rose aeonium needs repotting

Repotting on a calendar is less reliable than reading the plant. For black rose aeonium, watch for these signs:

Roots growing out of the drainage holes, or the rootball lifting the plant proud of the rim.
Soil that has shrunk away from the pot sides and no longer holds water.
The pot is unstable because the plant has grown top-heavy.
Old, compacted, broken-down mix that stays wet too long — for a succulent that is a rot risk, so refresh it even if the pot size is fine.

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 black rose aeonium

Every 2–3 years, into bone-dry mix. Black Rose Aeonium's growth habit — an upright, branching, tree-like aeonium that holds large flat rosettes at the tips of bare woody stems; it is monocarpic per rosette, so a rosette dies after flowering but the branched plant carries on. — sets the pace. Black rose aeonium 'Zwartkop' is a branching tree-like succulent topped with large flat rosettes of glossy leaves that turn near-black in strong sun and deep burgundy-green in shade. A winter grower that rests in summer heat, it makes a dramatic architectural houseplant. It is generally considered non-toxic, though not individually ASPCA-listed.

What size pot to step black rose aeonium up to

Use a pot only one size up — or even the same pot with fresh gritty mix if the roots have room. Black Rose Aeonium stores water and rots in a large pot of slow-drying soil. A tight terracotta pot that dries fast is far safer than a generous plastic one. Never up-pot a succulent by several sizes.

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 black rose aeonium

Spring or summer, while black rose aeonium is in active growth and warm, is best — roots recover fastest then, and the plant is not sitting in cool damp soil. Avoid repotting a succulent in winter dormancy.

Step-by-step: repotting black rose aeonium

Repot dry. Do not water black rose aeonium for several days first. Working with dry roots and dry mix dramatically lowers the rot risk for a succulent.
Pick a snug, fast-draining pot. Choose terracotta one size up at most, with a drainage hole. Have gritty free-draining succulent mix with some moisture retention ready.
Tip it out and clean the roots. Slide the plant out, crumble off the old soil, and trim any black, mushy or dead roots with clean snips.
Pot into dry mix. Set black rose aeonium at its original depth in dry gritty mix, firming gently. Do not bury the stem deeper than it was.
Wait a week before watering. Leave it completely dry and out of harsh sun for about 7 days so any damaged roots callus. Only then water lightly.

Aftercare

Keep black rose aeonium completely dry and out of fierce sun for about a week so any nicked roots callus before they meet moisture; watering a freshly repotted succulent is the classic way to rot it. Then resume the normal lean, dry rhythm. Do not fertilise for about 3 weeks — fresh mix already carries nutrients and feeding freshly disturbed roots scorches them.

The right soil mix for black rose aeonium

Black Rose Aeonium wants free-draining succulent mix with some moisture retention. Aeoniums have shallow, finer roots and like slightly more moisture-retentive mix than desert succulents, but it must still drain freely. Use cactus compost with added perlite or grit and a pot with drainage holes. Avoid both bone-dry pure grit and heavy, sodden soils. Always use fresh mix when you repot — reusing old, broken-down soil reintroduces the compaction and poor drainage you are repotting to fix.

Repotting black rose aeonium — frequently asked questions

How often should you repot black rose aeonium?

Every 2–3 years, into bone-dry mix for black rose aeonium. Repot black rose aeonium every 2–3 years into a snug pot of free-draining succulent mix with some moisture retention, ideally in spring or summer. Let it sit in dry soil and do not water for about a week afterwards so any nicked roots can callus. Over-potting and watering straight away is what rots succulents.

What size pot does black rose aeonium need?

When is the best time of year to repot black rose aeonium?

Should you water black rose aeonium after repotting?

No — not straight away. Repot black rose aeonium into dry mix and wait about a week before the first watering so any damaged roots callus over. Watering a freshly repotted succulent is the single most common way to rot one.

Should you fertilise black rose aeonium after repotting?

Not immediately. Wait about 3 weeks after repotting black rose aeonium. Fresh mix already contains nutrients, and feeding freshly cut or disturbed roots burns them. Resume your normal feeding routine once you see new growth.