Repotting guide

When & how to repot Pyrenean Heron's Bill (Erodium manescavii)

Also called Pyrenean Heron's Bill, Manescau Stork's Bill, Heron's Bill.

More about pyrenean heron's bill

About Pyrenean Heron's Bill

Erodium manescavii · also called Pyrenean Heron's Bill, Manescau Stork's Bill · flowering

Erodium manescavii is a robust, clump-forming perennial native to the Pyrenees of France and Spain, producing long-stemmed, showy clusters of five-petalled magenta-purple flowers with darker blotching on the upper petals from early summer through early autumn. It is larger than most Erodium species, forming a dome of finely divided, pinnate, softly hairy leaves to 45 cm, and it earned the RHS Award of Garden Merit for reliable garden performance. Sharp drainage is the single most critical requirement — it resents wet winter soil above all else, and waterlogged crowns are the primary cause of plant death. Erodium species are absent from the ASPCA Toxic Plants database, so toxicity status cannot be confirmed; as a precaution, they are classified as mildly-toxic pending a definitive assessment.

Mature size: 30-45 cm tall by 30-40 cm wide.

Watch for — Vine weevil: Root-feeding larvae are occasionally problematic in container-grown plants; apply nematode biological controls in late summer when soil temperature is above 5 °C.

How to tell pyrenean heron's bill needs repotting

Repotting on a calendar is less reliable than reading the plant. For pyrenean heron's bill, 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 pyrenean heron's bill

Every 2–3 years, into bone-dry mix. Pyrenean Heron's Bill's growth habit — clump-forming, deciduous to semi-evergreen perennial with a rosette of pinnate, hairy leaves. — sets the pace. Erodium manescavii is a robust, clump-forming perennial native to the Pyrenees of France and Spain, producing long-stemmed, showy clusters of five-petalled magenta-purple flowers with darker blotching on the upper petals from early summer through early autumn. It is larger than most Erodium species, forming a dome of finely divided, pinnate, softly hairy leaves to 45 cm, and it earned the RHS Award of Garden Merit for reliable garden performance. Sharp drainage is the single most critical requirement — it resents wet winter soil above all else, and waterlogged crowns are the primary cause of plant death. Erodium species are absent from the ASPCA Toxic Plants database, so toxicity status cannot be confirmed; as a precaution, they are classified as mildly-toxic pending a definitive assessment.

What size pot to step pyrenean heron's bill up to

Use a pot only one size up — or even the same pot with fresh gritty mix if the roots have room. Pyrenean Heron's Bill 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 pyrenean heron's bill

Spring or summer, while pyrenean heron's bill 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 pyrenean heron's bill

Repot dry. Do not water pyrenean heron's bill 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, sharply drained, neutral to alkaline 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 pyrenean heron's bill 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 pyrenean heron's bill 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 pyrenean heron's bill

Pyrenean Heron's Bill wants gritty, sharply drained, neutral to alkaline. Thrives in chalk, loam, or sandy soil with added grit; on heavy soils, incorporate up to 50% horticultural grit and plant with the crown slightly raised to shed water away from the base of the rosette. Always use fresh mix when you repot — reusing old, broken-down soil reintroduces the compaction and poor drainage you are repotting to fix.

Repotting pyrenean heron's bill — frequently asked questions

How often should you repot pyrenean heron's bill?

Every 2–3 years, into bone-dry mix for pyrenean heron's bill. Repot pyrenean heron's bill every 2–3 years into a snug pot of gritty, sharply drained, neutral to alkaline, 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 pyrenean heron's bill need?

When is the best time of year to repot pyrenean heron's bill?

Should you water pyrenean heron's bill after repotting?

No — not straight away. Repot pyrenean heron's bill 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 pyrenean heron's bill after repotting?

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