Soil & potting mix
Best soil for London Pride (Saxifraga urbium)
Also called London Pride, None-so-Pretty, St Patrick's Cabbage hybrid.
More about london pride
About London Pride
Saxifraga urbium · also called London Pride, None-so-Pretty · flowering
London Pride is a tough, semi-evergreen perennial forming dense rosettes of rounded, leathery leaves. In late spring it sends up airy 30 cm stems bearing delicate pink-flushed white star-shaped flowers. Exceptionally shade and pollution tolerant, it thrives in urban gardens, rockeries, and wall crevices, spreading slowly by stolons.
Preferred mix: Moist, humus-rich, well-drained soil; tolerant of a wide range
Watch for — Vine weevil grub damage: Creamy-white grubs feed on roots through winter, causing plants to suddenly wilt and collapse. Apply nematode biological controls (Steinernema kraussei) to moist soil in autumn when soil temperature is above 5°C.
Why london pride needs this mix
London Pride flowers hardest in a rich but free-draining loam — fed enough to fuel the display, open enough that the roots never waterlog.
- Flowering is expensive for london pride: producing buds, blooms and seed draws heavily on nutrients and steady moisture, so the soil has to keep delivering all season.
- A loam-based mix holds nutrients and water far more evenly than a light peat mix, which means a longer, more reliable flowering period.
- It still needs sharp drainage — most flowering plants resent cold, wet feet far more than they resent being a little lean.
For the full picture on what makes up a good mix, see our guide to the main types of soil and potting media — it explains why each ingredient above behaves the way it does.
What goes wrong with the wrong mix
The wrong soil is one of the most common reasons london pride struggles, and the damage often shows up weeks later as a watering problem. For this species specifically:
- A thin, hungry or sandy mix gives london pride weak growth and few, short-lived flowers — it simply runs out of fuel.
- A heavy, badly drained soil rots the roots or crown, often over a wet winter, and you lose the plant before it ever flowers again.
- Over-rich, high-nitrogen mixes can push lush leaf at the expense of flowers — balance, not excess, is the aim.
Either starving london pride in a thin mix or drowning it in a heavy, badly drained one. It wants the rich-but-free-draining middle, plus a flowering (higher-potassium) feed in season.
pH — does it matter for london pride?
Most flowering plants, including london pride, do well around pH 6.0-7.0. A cheap soil test is worth it outdoors; one notable exception is any acid-lover (such as some hydrangeas), where pH directly changes flower colour.
If you want to check or adjust it, the soil pH guide walks through testing and the safe ways to nudge a mix more acidic or more alkaline.
DIY mix vs a bagged one
A quality bagged compost works for london pride in pots if you add grit and a flowering feed. In beds, improving the existing soil with compost and ensuring drainage beats any bag.
Drainage and the pot
Free drainage protects the roots and especially the crown over winter — raised beds, grit in the planting hole and never a waterlogged spot. Containers must have a clear drainage hole.
For perennials, refresh the top layer and feed each spring rather than disturbing the roots; for container displays, start with fresh rich mix each season. When the time comes, our repotting guide for london pride covers the timing and technique step by step.
London Pride soil — frequently asked questions
What is the best soil mix for london pride?
3 parts good loam or quality peat-free compost : 1 part well-rotted compost or leaf mould : 1 part grit or perlite. Flowering is expensive for london pride: producing buds, blooms and seed draws heavily on nutrients and steady moisture, so the soil has to keep delivering all season.
Can I use normal potting soil for london pride?
A thin, hungry or sandy mix gives london pride weak growth and few, short-lived flowers — it simply runs out of fuel. A quality bagged compost works for london pride in pots if you add grit and a flowering feed. In beds, improving the existing soil with compost and ensuring drainage beats any bag.
Does london pride need a special pH?
Most flowering plants, including london pride, do well around pH 6.0-7.0. A cheap soil test is worth it outdoors; one notable exception is any acid-lover (such as some hydrangeas), where pH directly changes flower colour.
Should I buy a bagged mix or make my own for london pride?
A quality bagged compost works for london pride in pots if you add grit and a flowering feed. In beds, improving the existing soil with compost and ensuring drainage beats any bag.
How often should I refresh the soil for london pride?
For perennials, refresh the top layer and feed each spring rather than disturbing the roots; for container displays, start with fresh rich mix each season. Free drainage protects the roots and especially the crown over winter — raised beds, grit in the planting hole and never a waterlogged spot. Containers must have a clear drainage hole.
Keep reading
- London Pride care — the full brief (light, water, humidity, problems, pet safety)
- How often to water london pride — the schedule the mix feeds into
- Repotting london pride — when and how to refresh the mix
- Soil pH guide — test it and adjust it safely
- Should I water my plant? The simple check first
- Why is my plant wilting? Wet vs dry diagnosis
- Root rot — how the wrong soil starts it, and how to save the plant
- Best soil for eastern red columbine
- Best soil for blue columbine
- Best soil for aquilegia 'black barlow'
- All 8452 soil and potting-mix guides in the Growli library