Repotting guide

When & how to repot Yellow Heron's Bill (Erodium chrysanthum)

Also called Yellow Heron's Bill, Silver Heronsbill, Golden Storksbill.

More about yellow heron's bill

About Yellow Heron's Bill

Erodium chrysanthum · also called Yellow Heron's Bill, Silver Heronsbill · flowering

Erodium chrysanthum is a dense, tufted, evergreen perennial native to central and southern Greece, grown as much for its attractive mound of finely divided, silvery-grey, fern-like foliage as for its pale creamy-yellow flowers (occasionally pale pink on female plants of this dioecious species) that appear from late spring through summer. It is a classic alpine or rock garden plant that demands sharp drainage and a baking sunny position to replicate its native scree and rocky hillside habitat. The silvery foliage is its chief ornamental asset year-round, making it worthwhile even when not in flower. Erodium species are absent from the ASPCA Toxic Plants database, so toxicity status cannot be confirmed; it is classified as mildly-toxic as a precaution.

Mature size: 15-20 cm tall by 30-40 cm wide.

Watch for — Crown rot from winter wet: The most common cause of death in UK gardens; the crown and roots rot when water sits around them in cold weather — always plant in sharply drained soil, add a grit collar around the crown, and consider moving container plants under cover from November to March.

How to tell yellow heron's bill needs repotting

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

Every 2–3 years, into bone-dry mix. Yellow Heron's Bill's growth habit — dense, compact, evergreen perennial forming a tight mound of silvery, finely divided foliage. — sets the pace. Erodium chrysanthum is a dense, tufted, evergreen perennial native to central and southern Greece, grown as much for its attractive mound of finely divided, silvery-grey, fern-like foliage as for its pale creamy-yellow flowers (occasionally pale pink on female plants of this dioecious species) that appear from late spring through summer. It is a classic alpine or rock garden plant that demands sharp drainage and a baking sunny position to replicate its native scree and rocky hillside habitat. The silvery foliage is its chief ornamental asset year-round, making it worthwhile even when not in flower. Erodium species are absent from the ASPCA Toxic Plants database, so toxicity status cannot be confirmed; it is classified as mildly-toxic as a precaution.

What size pot to step yellow 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. Yellow 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 yellow heron's bill

Spring or summer, while yellow 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 yellow heron's bill

Repot dry. Do not water yellow 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, humus-rich, 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 yellow 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 yellow 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 yellow heron's bill

Yellow Heron's Bill wants gritty, humus-rich, sharply drained, neutral to alkaline. Best in a mix of loam, coarse grit, and a little leaf mould in roughly equal parts; absolutely must not sit in wet soil over winter — use a fine gravel top dressing around the crown to reduce splash-back and moisture retention. Always use fresh mix when you repot — reusing old, broken-down soil reintroduces the compaction and poor drainage you are repotting to fix.

Repotting yellow heron's bill — frequently asked questions

How often should you repot yellow heron's bill?

Every 2–3 years, into bone-dry mix for yellow heron's bill. Repot yellow heron's bill every 2–3 years into a snug pot of gritty, humus-rich, 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 yellow heron's bill need?

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

Should you water yellow heron's bill after repotting?

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

Not immediately. Wait about 3 weeks after repotting yellow 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.