Repotting guide

When & how to repot Common purslane (Portulaca oleracea)

Also called common purslane, purslane, verdolaga, pigweed, little hogweed, fatweed.

More about common purslane

About Common purslane

Portulaca oleracea · also called common purslane, purslane · edible

Common purslane is a fleshy, prostrate annual valued both as a culinary herb and salad green across Mediterranean, Middle Eastern and Asian cuisines. Its succulent stems and leaves are rich in omega-3 fatty acids, vitamins A and C, and have a mild, slightly lemony flavour. It thrives in poor, dry soil and full sun. The ASPCA lists Portulaca as toxic to pets via soluble oxalates.

Mature size: 10-25 cm tall, 30-60 cm spread

How to tell common purslane needs repotting

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

Every 2–3 years, into bone-dry mix. Common purslane's growth habit — prostrate to semi-erect warm-season annual; sprawling mat-forming habit — sets the pace. Common purslane is a fleshy, prostrate annual valued both as a culinary herb and salad green across Mediterranean, Middle Eastern and Asian cuisines. Its succulent stems and leaves are rich in omega-3 fatty acids, vitamins A and C, and have a mild, slightly lemony flavour. It thrives in poor, dry soil and full sun. The ASPCA lists Portulaca as toxic to pets via soluble oxalates.

What size pot to step common purslane up to

Use a pot only one size up — or even the same pot with fresh gritty mix if the roots have room. Common purslane 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 common purslane

Spring or summer, while common purslane 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 common purslane

Repot dry. Do not water common purslane 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 poor to moderately fertile, well-drained soil 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 common purslane 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 common purslane 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 common purslane

Common purslane wants poor to moderately fertile, well-drained soil. One of the least demanding edible plants — grows in sandy, loamy or even compacted soil of low fertility. Rich, heavy soil produces excessive leafy growth and reduces the lemony succulence of the stems. Neutral to slightly alkaline pH (6.5-7.5) is ideal. Good drainage is essential to prevent stem rot. Always use fresh mix when you repot — reusing old, broken-down soil reintroduces the compaction and poor drainage you are repotting to fix.

Repotting common purslane — frequently asked questions

How often should you repot common purslane?

Every 2–3 years, into bone-dry mix for common purslane. Repot common purslane every 2–3 years into a snug pot of poor to moderately fertile, well-drained soil, 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 common purslane need?

When is the best time of year to repot common purslane?

Should you water common purslane after repotting?

No — not straight away. Repot common purslane 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 common purslane after repotting?

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