Fertilising guide

How to fertilise Creeping Speedwell (Veronica repens)— schedule & NPK

Also called Creeping Speedwell, Corsican Speedwell.

More about creeping speedwell

About Creeping Speedwell

Veronica repens · also called Creeping Speedwell, Corsican Speedwell · flowering

Creeping Speedwell is a low, mat-forming perennial native to Corsica and southern Europe. It produces a carpet of tiny bright blue flowers in spring and thrives in cool, moist conditions. Excellent as a ground cover or between stepping stones, it tolerates light foot traffic and spreads readily in suitable climates.

Growth habit: Prostrate, mat-forming perennial; spreads by creeping stems that root at nodes

What fertiliser creeping speedwell actually wants — and why

Creeping Speedwell flowers best on poor soil — feed it and you get a lush leafy plant with very few blooms, the exact opposite of what you want.

Little or nothing. Rich, especially nitrogen-rich, soil pushes foliage at the expense of flowers in this plant — lean ground is the technique, not a deficiency.

For the language behind the three numbers on the bottle — what nitrogen, phosphorus and potassium each do — see the NPK ratio explained entry. The short version for creeping speedwell: match the feed to the job the plant is doing right now, not to a generic “plant food” on the shelf.

How often to feed creeping speedwell, and which months

Feeding only earns its keep while the plant is in active growth and can use the nutrients — pour feed into a dormant or low-light plant and it simply builds up as root-burning salt. For creeping speedwell:

Apply a balanced slow-release fertiliser (e.g. 10-10-10) once in early spring. Avoid high-nitrogen feeds that promote lush foliage at the expense of flowers. In practice: no routine feeding at all for creeping speedwell — at most a thin compost mulch for soil structure, never a flowering or nitrogen feed.

The dormant-season rule matters more than the exact interval: skip feeding entirely when creeping speedwell is resting. For the wider context on indoor feeding rhythms across the seasons, the houseplant fertiliser schedule walks through the year month by month.

What strength to mix for creeping speedwell

None is the correct answer for creeping speedwell. The flower-versus-foliage trade-off is the whole point: hold back and you get the display.

Feeding always goes onto already-damp soil, never dry roots — water creeping speedwell first if the soil is dry, then apply the diluted feed. The companion question is when to water at all, covered in the creeping speedwell watering schedule.

Signs you are over-feeding creeping speedwell

Over-feeding is far more common — and more damaging — than under-feeding for most plants. The classic tells for creeping speedwell:

Abundant leafy growth and very few flowers (the classic over-rich symptom).
Soft, floppy stems and a sprawling, leafy habit.
Scorched edges and salt crust if it has been fed in a container.

Signs you are under-feeding creeping speedwell

Effectively never an issue — these plants flower on poverty.
Only on genuinely dead soil: weak, thin growth and few blooms.
A short-lived plant in completely spent container compost.

If the symptoms point at watering, light or roots rather than nutrition, the full creeping speedwell care brief covers soil, humidity and the common problems for this species.

Flushing and leaching the salts

If creeping speedwell has accidentally been fed and is all leaf, a plain-water flush plus a move to leaner soil resets it; otherwise no flushing is needed because you are not feeding it.

Organic vs synthetic feeds for creeping speedwell

Organic options

A thin compost mulch for soil structure is the absolute most; mostly, give it nothing. UK/US: leave it lean — no manure, no liquid feed. Poor soil is the active ingredient here.

Synthetic / liquid feeds

None. Synthetic feeds, particularly anything with appreciable nitrogen, directly suppress flowering in creeping speedwell.

Brand names are examples, not endorsements, and UK and US ranges differ — check the label’s own NPK and dilution rate, since formulations change.

Fertilising creeping speedwell — frequently asked questions

What fertiliser does creeping speedwell need?

Little or nothing. Rich, especially nitrogen-rich, soil pushes foliage at the expense of flowers in this plant — lean ground is the technique, not a deficiency. Creeping Speedwell flowers best on poor soil — feed it and you get a lush leafy plant with very few blooms, the exact opposite of what you want.

How often should I feed creeping speedwell?

Apply a balanced slow-release fertiliser (e.g. 10-10-10) once in early spring. Avoid high-nitrogen feeds that promote lush foliage at the expense of flowers. Apply a balanced slow-release fertiliser (e.g. 10-10-10) once in early spring. Avoid high-nitrogen feeds that promote lush foliage at the expense of flowers. In practice: no routine feeding at all for creeping speedwell — at most a thin compost mulch for soil structure, never a flowering or nitrogen feed.

What strength of feed for creeping speedwell?