Repotting guide

When & how to repot Dalmatian Cranesbill (Geranium dalmaticum)

Also called Dalmatian Cranesbill, Dalmatian Geranium.

More about dalmatian cranesbill

About Dalmatian Cranesbill

Geranium dalmaticum · also called Dalmatian Cranesbill, Dalmatian Geranium · flowering

Geranium dalmaticum is a dwarf semi-evergreen perennial native to the limestone mountains of the former Dalmatia region (present-day Croatia and Albania), forming neat, glossy-leaved mats that turn rich shades of orange and red in autumn. Soft pink flowers are borne above the foliage from late spring to early summer. It received the RHS Award of Garden Merit and is one of the best low-growing cranesbills for rock gardens, wall tops, and container edging. True Geranium species are non-toxic to cats and dogs per ASPCA guidance.

Mature size: 10–15 cm tall and 30–45 cm wide.

Watch for — Root rot in waterlogged soil: The plant's native limestone habitat means it is intolerant of wet, poorly drained positions; ensure excellent drainage year-round, particularly in winter — raised alpine beds and wall top plantings are ideal.

How to tell dalmatian cranesbill needs repotting

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

Every 2–3 years, into bone-dry mix. Dalmatian Cranesbill's growth habit — low, spreading, mat-forming semi-evergreen perennial; spreads slowly by rhizomes. — sets the pace. Geranium dalmaticum is a dwarf semi-evergreen perennial native to the limestone mountains of the former Dalmatia region (present-day Croatia and Albania), forming neat, glossy-leaved mats that turn rich shades of orange and red in autumn. Soft pink flowers are borne above the foliage from late spring to early summer. It received the RHS Award of Garden Merit and is one of the best low-growing cranesbills for rock gardens, wall tops, and container edging. True Geranium species are non-toxic to cats and dogs per ASPCA guidance.

What size pot to step dalmatian cranesbill up to

Use a pot only one size up — or even the same pot with fresh gritty mix if the roots have room. Dalmatian Cranesbill 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 dalmatian cranesbill

Spring or summer, while dalmatian cranesbill 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 dalmatian cranesbill

Repot dry. Do not water dalmatian cranesbill 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 well-drained, neutral to alkaline, gritty or stony 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 dalmatian cranesbill 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 dalmatian cranesbill 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 dalmatian cranesbill

Dalmatian Cranesbill wants well-drained, neutral to alkaline, gritty or stony soil. Thrives in the kind of sharply draining alkaline conditions found in rock garden pockets and wall crevices; add grit liberally to any heavy border soil before planting. Always use fresh mix when you repot — reusing old, broken-down soil reintroduces the compaction and poor drainage you are repotting to fix.

Repotting dalmatian cranesbill — frequently asked questions

How often should you repot dalmatian cranesbill?

Every 2–3 years, into bone-dry mix for dalmatian cranesbill. Repot dalmatian cranesbill every 2–3 years into a snug pot of well-drained, neutral to alkaline, gritty or stony 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 dalmatian cranesbill need?

When is the best time of year to repot dalmatian cranesbill?

Should you water dalmatian cranesbill after repotting?

No — not straight away. Repot dalmatian cranesbill 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 dalmatian cranesbill after repotting?

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