Fertilising guide
How to fertilise Summer savory (Satureja hortensis)— schedule & NPK
Also called savoury, sarriette.
About Summer savory
Satureja hortensis · also called savoury, sarriette · herb
Summer savory is an annual Mediterranean herb with peppery thyme-like leaves used with beans and sausages. Quick from seed and tolerant of poor soil. Pet-safe in culinary amounts.
Summer savory (Satureja hortensis, Lamiaceae) is a bushy annual native to southern Europe, with a peppery aroma reminiscent of marjoram and thyme; it is the classic partner herb for beans.
Light to moderate feeder; fertile soil supports leafy growth, but excessive feeding is unnecessary for this quick annual.
Growth habit: Bushy annual
Sources: plants.ces.ncsu.edu, extension.illinois.edu
What fertiliser summer savory actually wants — and why
Summer savory is a lean, aromatic herb — the essential-oil flavour you grow it for is strongest in poor soil, so feeding it actively makes it worse.
Little or nothing. If anything, a very weak balanced feed or a thin compost top-dress — never a rich nitrogen feed, which dilutes the aromatic oils and produces soft, bland, floppy growth.
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 summer savory: 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 summer savory, 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 summer savory:
Light feed at planting; lean soil concentrates flavour. In practice: a spring compost top-dress at most, and otherwise leave summer savory unfed — lean, sharp-draining soil is exactly what concentrates its flavour.
The dormant-season rule matters more than the exact interval: skip feeding entirely when summer savory 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 summer savory
As weak as it gets for summer savory, or none at all. The flavour-versus-growth trade-off runs the opposite way to leafy crops: restraint is the technique.
Feeding always goes onto already-damp soil, never dry roots — water summer savory first if the soil is dry, then apply the diluted feed. The companion question is when to water at all, covered in the summer savory watering schedule.
Signs you are over-feeding summer savory
Over-feeding is far more common — and more damaging — than under-feeding for most plants. The classic tells for summer savory:
- Lush, soft, fast growth with noticeably weaker scent and flavour.
- Floppy stems, sparse essential oils, and poor cold/wet hardiness.
- Salt crust in containers and scorched leaf tips from over-feeding.
Signs you are under-feeding summer savory
- Rare — these herbs thrive on lean soil.
- Only on truly exhausted soil: pale, thin, very slow growth.
- A short-lived, weak plant in a long-spent container.
If the symptoms point at watering, light or roots rather than nutrition, the full summer savory care brief covers soil, humidity and the common problems for this species.
Flushing and leaching the salts
Over-feeding is so unlikely with summer savory that flushing is rarely needed; if a container has had feed, a single plain-water flush and a switch to a leaner, grittier mix resets it.
Organic vs synthetic feeds for summer savory
Organic options
A thin spring mulch of garden compost or leaf-mould is the most these want. UK: a little garden compost; US: a light Espoma Garden-tone top-dress at most. Lean and gritty beats fed and rich every time.
Synthetic / liquid feeds
Generally none for summer savory. At absolute most, a very dilute balanced feed once or twice in a container; in the ground, nothing — synthetic feeds work directly against the flavour.
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 summer savory — frequently asked questions
What fertiliser does summer savory need?
Little or nothing. If anything, a very weak balanced feed or a thin compost top-dress — never a rich nitrogen feed, which dilutes the aromatic oils and produces soft, bland, floppy growth. Summer savory is a lean, aromatic herb — the essential-oil flavour you grow it for is strongest in poor soil, so feeding it actively makes it worse.
How often should I feed summer savory?
Light feed at planting; lean soil concentrates flavour. Light feed at planting; lean soil concentrates flavour. In practice: a spring compost top-dress at most, and otherwise leave summer savory unfed — lean, sharp-draining soil is exactly what concentrates its flavour.
What strength of feed for summer savory?
As weak as it gets for summer savory, or none at all. The flavour-versus-growth trade-off runs the opposite way to leafy crops: restraint is the technique.
What does over-feeding summer savory look like?
Lush, soft, fast growth with noticeably weaker scent and flavour. Floppy stems, sparse essential oils, and poor cold/wet hardiness. Salt crust in containers and scorched leaf tips from over-feeding. Feeding summer savory like a leafy vegetable is the defining mistake — rich nitrogen gives you a big, soft, fast plant whose leaves are watery and bland, with weak winter-rot resistance.
Should I flush the soil of summer savory?
Over-feeding is so unlikely with summer savory that flushing is rarely needed; if a container has had feed, a single plain-water flush and a switch to a leaner, grittier mix resets it.
Keep reading
- Summer savory care — the full brief (light, soil, humidity, problems, pet safety)
- How often to water summer savory — the watering schedule
- The houseplant fertiliser schedule — feeding through the year
- NPK ratio explained — what the three numbers on the bottle mean
- How to fertilise basil
- How to fertilise herb garden
- How to fertilise mint
- All 200 fertilising guides in the Growli library