Repotting guide

When & how to repot Saucer Plant (Aeonium undulatum)

Also called Dinner Plate Aeonium.

More about saucer plant

About Saucer Plant

Aeonium undulatum · also called Dinner Plate Aeonium · houseplant

Aeonium undulatum is a tall, single-stemmed succulent forming a large glossy rosette of spoon-shaped green leaves atop a bare woody trunk. Unlike most aeoniums it rarely branches. It grows in winter and goes semi-dormant in hot, dry summers, so its watering rhythm is the reverse of typical houseplants. Give bright light and very sharp drainage.

Mature size: Up to 90-100 cm tall indoors over years, with a rosette 25-30 cm across.

How to tell saucer plant needs repotting

Repotting on a calendar is less reliable than reading the plant. For saucer plant, 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 saucer plant

Every 2–3 years, into bone-dry mix. Saucer Plant's growth habit — erect, usually unbranched succulent with a thick woody stem topped by a single large terminal rosette. mature plants may produce a tall conical panicle of yellow flowers, after which that rosette dies (it is monocarpic). — sets the pace. Aeonium undulatum is a tall, single-stemmed succulent forming a large glossy rosette of spoon-shaped green leaves atop a bare woody trunk. Unlike most aeoniums it rarely branches. It grows in winter and goes semi-dormant in hot, dry summers, so its watering rhythm is the reverse of typical houseplants. Give bright light and very sharp drainage.

What size pot to step saucer plant up to

Use a pot only one size up — or even the same pot with fresh gritty mix if the roots have room. Saucer Plant 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 saucer plant

Spring or summer, while saucer plant 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 saucer plant

Repot dry. Do not water saucer plant 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 gritty, fast-draining cactus and succulent mix 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 saucer plant 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 saucer plant 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 saucer plant

Saucer Plant wants gritty, fast-draining cactus and succulent mix. Use a cactus compost cut with around one-third perlite, pumice or coarse grit. The roots must never stay wet. A terracotta pot with a generous drainage hole helps wick excess moisture from the heavy trunk. Always use fresh mix when you repot — reusing old, broken-down soil reintroduces the compaction and poor drainage you are repotting to fix.

Repotting saucer plant — frequently asked questions

How often should you repot saucer plant?

Every 2–3 years, into bone-dry mix for saucer plant. Repot saucer plant every 2–3 years into a snug pot of gritty, fast-draining cactus and succulent mix, 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 saucer plant need?

When is the best time of year to repot saucer plant?

Should you water saucer plant after repotting?

No — not straight away. Repot saucer plant 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 saucer plant after repotting?

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