Repotting guide

When & how to repot Sea Purslane (Atriplex portulacoides)

Also called Sea purslane, Lesser shrubby orache, Shrubby sea-purslane.

More about sea purslane

About Sea Purslane

Atriplex portulacoides · also called Sea purslane, Lesser shrubby orache · edible

Atriplex portulacoides is a low, spreading, evergreen subshrub native to saltmarshes and upper tidal mudflats around European coasts, including much of the British coastline. Its thick, succulent grey-green leaves are edible with a naturally salty, pleasantly crisp texture and are used raw in salads or lightly cooked as a seasoning vegetable. The most important care fact is maximum sun and free-draining or brackish-tolerant soil — it evolved in intertidal conditions and will not tolerate shade or heavy, waterlogged growing media. Not listed as toxic to pets by the ASPCA; moderation is advisable due to naturally high salt and oxalate content.

Mature size: 60–80 cm (2–2.5 ft) tall, spread to 1 m (3 ft).

Watch for — Legginess and poor form in shade: In anything less than full sun, the plant becomes drawn, pale, and loses its compact habit — reposition in an open, fully sun-exposed site or renovate by cutting back hard in early spring.

How to tell sea purslane needs repotting

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

Every 2–3 years, into bone-dry mix. Sea Purslane's growth habit — low, spreading semi-prostrate to erect evergreen subshrub with fleshy, silvery-grey elliptic leaves; inconspicuous greenish flowers in summer followed by small fruiting clusters. — sets the pace. Atriplex portulacoides is a low, spreading, evergreen subshrub native to saltmarshes and upper tidal mudflats around European coasts, including much of the British coastline. Its thick, succulent grey-green leaves are edible with a naturally salty, pleasantly crisp texture and are used raw in salads or lightly cooked as a seasoning vegetable. The most important care fact is maximum sun and free-draining or brackish-tolerant soil — it evolved in intertidal conditions and will not tolerate shade or heavy, waterlogged growing media. Not listed as toxic to pets by the ASPCA; moderation is advisable due to naturally high salt and oxalate content.

What size pot to step sea purslane up to

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

Spring or summer, while sea 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 sea purslane

Repot dry. Do not water sea 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 sandy, loamy, or saline; any well-drained or moderately moist 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 sea 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 sea 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 sea purslane

Sea Purslane wants sandy, loamy, or saline; any well-drained or moderately moist soil. Highly tolerant of saline, alkaline, and clay-to-sandy soils; does well in poor, salty conditions but will rot in permanently waterlogged sites — add grit to heavy soils when planting inland. Always use fresh mix when you repot — reusing old, broken-down soil reintroduces the compaction and poor drainage you are repotting to fix.

Repotting sea purslane — frequently asked questions

How often should you repot sea purslane?

Every 2–3 years, into bone-dry mix for sea purslane. Repot sea purslane every 2–3 years into a snug pot of sandy, loamy, or saline; any well-drained or moderately moist 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 sea purslane need?

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

Should you water sea purslane after repotting?

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

Not immediately. Wait about 3 weeks after repotting sea 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.