Repotting guide

When & how to repot Pelargonium 'Lord Bute' (Pelargonium 'Lord Bute')

Also called Regal pelargonium Lord Bute, Martha Washington geranium Lord Bute.

More about pelargonium 'lord bute'

About Pelargonium 'Lord Bute'

Pelargonium 'Lord Bute' · also called Regal pelargonium Lord Bute, Martha Washington geranium Lord Bute · flowering

Pelargonium 'Lord Bute' is a popular regal pelargonium prized for velvety, deep maroon-black flowers edged with a fine ruby-pink margin. A bushy, tender perennial, it blooms profusely in late spring and summer above rounded, slightly serrated green leaves. Best as a frost-free patio or conservatory plant, it wants bright light, free-draining compost, and a careful, never-soggy watering regime.

Mature size: 30-45 cm tall and 30-40 cm wide; larger in a frost-free border or large pot

Watch for — Few flowers / leggy growth: Caused by too little light or too much nitrogen. Move to full sun, pinch the tips, and feed high-potash rather than high-nitrogen.

How to tell pelargonium 'lord bute' needs repotting

Repotting on a calendar is less reliable than reading the plant. For pelargonium 'lord bute', 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 pelargonium 'lord bute'

Every 2–3 years, into bone-dry mix. Pelargonium 'Lord Bute''s growth habit — bushy, upright, evergreen tender perennial (regal pelargonium) with woody-based stems; benefits from pinching to stay compact and well-branched. — sets the pace. Pelargonium 'Lord Bute' is a popular regal pelargonium prized for velvety, deep maroon-black flowers edged with a fine ruby-pink margin. A bushy, tender perennial, it blooms profusely in late spring and summer above rounded, slightly serrated green leaves. Best as a frost-free patio or conservatory plant, it wants bright light, free-draining compost, and a careful, never-soggy watering regime.

What size pot to step pelargonium 'lord bute' up to

Use a pot only one size up — or even the same pot with fresh gritty mix if the roots have room. Pelargonium 'Lord Bute' 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 pelargonium 'lord bute'

Spring or summer, while pelargonium 'lord bute' 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 pelargonium 'lord bute'

Repot dry. Do not water pelargonium 'lord bute' 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 free-draining, gritty, neutral to slightly alkaline compost 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 pelargonium 'lord bute' 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 pelargonium 'lord bute' 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 pelargonium 'lord bute'

Pelargonium 'Lord Bute' wants free-draining, gritty, neutral to slightly alkaline compost. A loam-based mix (such as John Innes No.2) with added grit or perlite gives the sharp drainage roots need. Avoid heavy, water-retentive media that encourage black leg and root 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 pelargonium 'lord bute' — frequently asked questions

How often should you repot pelargonium 'lord bute'?

Every 2–3 years, into bone-dry mix for pelargonium 'lord bute'. Repot pelargonium 'lord bute' every 2–3 years into a snug pot of free-draining, gritty, neutral to slightly alkaline compost, 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 pelargonium 'lord bute' need?

When is the best time of year to repot pelargonium 'lord bute'?

Should you water pelargonium 'lord bute' after repotting?

No — not straight away. Repot pelargonium 'lord bute' 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 pelargonium 'lord bute' after repotting?

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