Sage
Salvia officinalis
Gray-leaved guardian of brassicas — yet hard on cucumbers.
- Type
- Herb · Perennial
- Botanical family
- Mixed / other
- Foliage color
- Silver and gray · Green
- Flower color
- Purple and violet
- Sunlight
- Full sun
- Watering
- Low
- Soil
- Poor, dry, free-draining
- Feeding
- Seldom needs feeding — poor soil suits it better than rich.
- USDA zones
- 4a–8b
- Frost tolerant
- Yes
- Flowering
- May
- Pruning
- Give it a light trim once flowering is over, keeping clear of the bare wood.
- Sow indoors
- 49 days before the last spring frost
- Plant out
- at the last spring frost
- First harvest
- 60 days after the last spring frost
- Harvest ends
- 14 days after the first fall frost
- Mar–Apr Bud Break
- Apr–May Harvest
- May–Oct Flowering
- Oct–Dec Growing
- Jan–Mar Growing
- Plant spacing
- 19.7 in
- In-row spacing
- 17.7 in
- Between rows
- 23.6 in
- Square-foot density
- 1 per square
- Root system
- Woody and fibrous
- Working depth
- 12–24 in
- Can reach
- 3 ft down where the soil allows
- Spread
- 2–3 ft across, about 1.5–2× the width of the plant
- Shallowest pot
- 20 in of soil
A shallow woody framework with the fine feeding roots in the leaf litter above it. Those feeders are mostly under the outer half of the canopy rather than against the stem, which is where water and feed should go.
The habit is Sage’s own; the figures are what that habit usually comes to at this size, not a measurement of this species. Roots follow the soil either way: a compacted pan, a high water table or heavy clay stops them well short of any of it, and deep open ground lets them go further.
- Cats and dogs
- Confirmed safe
We say a plant is safe only where a named poison-control reference names that exact species and records it as non-toxic to both cats and dogs. Most plants are on nobody’s list, and their absence here is not a judgement about them. This is a record of what those references say, not veterinary advice, and it cannot account for your own animal, the quantity eaten, or a plant treated with anything.
- When
- Pick leaves any time during the growing season, with the main harvest just before flowering in early summer when the oils are strongest. Morning, after the dew dries, is best. In the plant's first year, harvest only lightly to let it establish.
- What to look for
- Large, pebbly, gray-green leaves that are thick, velvety, and intensely aromatic when rubbed. Flower buds forming mark peak flavor; leaves picked after heavy flowering can taste slightly resinous.
- How to harvest
- Pinch individual leaves or snip whole 10–15cm stem tips above a leaf pair. For a preserving harvest, cut the plant back by about a third just before it blooms — always cutting to green growth, never into bare old wood.
- How often
- Light continual picking all season keeps sage productive; one or two harder cuts per year (early summer, and a tidy in late spring) prevent legginess. Ease off from late summer so new growth toughens before winter; evergreen leaves can still be picked sparingly in winter.
- Storing the crop
- Fresh leaves keep about a week wrapped in damp paper in the fridge. Sage dries very well — hang bunches or dry leaves flat, then store whole (crumble at point of use) — and retains its strength for a year. Leaves also freeze well, plain or in oil, and make excellent herb butter.
- Rosemary beetle A small metallic green-and-purple striped beetle that grazes rosemary, lavender, sage, and thyme. Shake branches over a tray to collect adults and larvae.
- Powdery mildew A white dusty coating over leaves and shoots when roots are dry but the air is humid. Keep plants watered and mulched, prune for airflow, and remove the worst leaves.
- Root & crown rot Root rot where the soil stays wet
Rosemary, Thyme, Lavender, Beans
Its botanical name Salvia comes from the Latin for 'to save', for its old healing reputation.
Herbs, like this one.
The Cottage Garden Companion — the gardener's herbarium at cottagegardencompanion.com