Soil & potting mix
Best soil for Germander Speedwell (Veronica chamaedrys)
Also called Germander Speedwell, Bird's-eye Speedwell, Angel's Eyes.
More about germander speedwell
About Germander Speedwell
Veronica chamaedrys · also called Germander Speedwell, Bird's-eye Speedwell · flowering
Veronica chamaedrys is a low-growing native perennial wildflower found throughout the UK, Europe, and temperate Asia, typically carpeting grassy banks, hedgerows, and woodland edges with vivid sky-blue flowers from early spring to midsummer. It thrives in moist, reasonably fertile soil in sun or partial shade and spreads by creeping, rooting stems to form a dense, weed-suppressing mat. The most important care point is to keep soil consistently moist during dry spells, as the plant quickly wilts under drought. It is considered non-toxic to cats and dogs.
Preferred mix: Moist, well-drained, fertile loam
Watch for — Vine weevil grub damage: Vine weevil larvae feed on roots causing plants to wilt suddenly; check soil around wilting plants for c-shaped white grubs and treat with pathogenic nematodes in late summer.
Why germander speedwell needs this mix
Germander Speedwell is a Mediterranean dry-hillside plant — it wants a lean, sharply drained, slightly alkaline mix, and rots fast in rich, water-holding soil.
- Germander Speedwell evolved on stony, sun-baked slopes — its roots expect to dry out hard and quickly between rains, so the mix must drain almost as fast as you pour.
- A lean, low-nutrient mix keeps growth firm and aromatic; a rich one gives soft, sappy, flavourless growth that flops and rots.
- It tolerates and often prefers a slightly alkaline soil, the opposite of most houseplants.
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 germander speedwell struggles, and the damage often shows up weeks later as a watering problem. For this species specifically:
- Rich, moisture-holding compost is the classic killer of germander speedwell — especially over a cold, wet winter, when the base of the plant simply rots.
- A peaty, acidic potting mix is doubly wrong: too wet and the wrong pH direction.
- No grit means the rootball stays damp for days, which a dry-climate root system never copes with.
Growing germander speedwell in ordinary rich, moisture-retentive compost. Lean it out with at least a third grit, and never let it sit wet over winter.
pH — does it matter for germander speedwell?
Germander Speedwell likes neutral to slightly alkaline soil, roughly pH 6.5-7.5. If your soil or compost is acidic, a little garden lime or extra grit nudges it the right way — the one common plant where you may add lime.
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
Bagged "herb" or "Mediterranean" mixes are usually fine for germander speedwell, but most standard composts need cutting hard with grit. The DIY ratio above is cheap and exactly right.
Drainage and the pot
Sharp drainage is everything: a terracotta pot with a big hole, gritty mix and never a saucer left full. Raised beds suit these herbs outdoors for the same reason.
A gritty mix barely breaks down, so germander speedwell needs little repotting — refresh the top layer and the grit every couple of years rather than potting on aggressively. When the time comes, our repotting guide for germander speedwell covers the timing and technique step by step.
Germander Speedwell soil — frequently asked questions
What is the best soil mix for germander speedwell?
2 parts standard peat-free compost or loam : 1 part coarse horticultural grit : 1 part perlite or coarse sand. Germander Speedwell evolved on stony, sun-baked slopes — its roots expect to dry out hard and quickly between rains, so the mix must drain almost as fast as you pour.
Can I use normal potting soil for germander speedwell?
Rich, moisture-holding compost is the classic killer of germander speedwell — especially over a cold, wet winter, when the base of the plant simply rots. Bagged "herb" or "Mediterranean" mixes are usually fine for germander speedwell, but most standard composts need cutting hard with grit. The DIY ratio above is cheap and exactly right.
Does germander speedwell need a special pH?
Germander Speedwell likes neutral to slightly alkaline soil, roughly pH 6.5-7.5. If your soil or compost is acidic, a little garden lime or extra grit nudges it the right way — the one common plant where you may add lime.
Should I buy a bagged mix or make my own for germander speedwell?
Bagged "herb" or "Mediterranean" mixes are usually fine for germander speedwell, but most standard composts need cutting hard with grit. The DIY ratio above is cheap and exactly right.
How often should I refresh the soil for germander speedwell?
A gritty mix barely breaks down, so germander speedwell needs little repotting — refresh the top layer and the grit every couple of years rather than potting on aggressively. Sharp drainage is everything: a terracotta pot with a big hole, gritty mix and never a saucer left full. Raised beds suit these herbs outdoors for the same reason.
Keep reading
- Germander Speedwell care — the full brief (light, water, humidity, problems, pet safety)
- How often to water germander speedwell — the schedule the mix feeds into
- Repotting germander speedwell — when and how to refresh the mix
- Soil pH guide — test it and adjust it safely
- Overwatered plant — signs and recovery
- Root rot — how the wrong soil starts it, and how to save the plant
- Should I water my plant? The simple check first
- Best soil for begonia 'glowing embers'
- Best soil for begonia schmidtiana
- Best soil for begonia grandis subsp. evansiana
- All 10153 soil and potting-mix guides in the Growli library