Common sage

1. 1

   Choose your sage

   Common sage (Salvia officinalis): grey-green leaves, the toughest, the standard culinary form. The reliable backbone. Purple sage (Purpurascens): purple-flushed leaves, slightly more tender (H4), good flavour, attractive. Tricolor sage: pink-white-green variegated, ornamental, less hardy still, weaker flavour. Golden sage (Icterina): yellow-green variegated, less hardy, good flavour. Pineapple sage (S. elegans) — different species, half-hardy, fruity-pineapple scent, ornamental and culinary. For a kitchen herb, plant common sage. The coloured forms are ornamental first, edible second.

2. 2

   Buy a plant in spring, not seed

   Sage germinates slowly and unreliably from seed, and named cultivars don't come true. Buy a young plant in 9 cm or 1 L pot from a garden centre or herb nursery in April–May. One plant is enough for a household.

3. 3

   Plant in poor, well-drained, sunny soil

   The single biggest cause of sage failure in UK gardens is rich wet soil — it rots over winter. Sandy or gravelly soil is ideal; clay soils need plenty of horticultural grit forked in. Full sun. Avoid feeding — lush growth is weak growth that won't survive winter.

4. 4

   In heavy soils, grow in a pot

   A 30 cm pot of peat-free compost mixed 50/50 with horticultural grit gives perfect drainage. Stand it in full sun. Pots are also useful in cold gardens — move under cover (shed, conservatory) in deep winter to protect tender variegated forms.

5. 5

   Hard-prune in spring

   After the last frost (April–May), cut the bush back hard — by about a third to half. This stops it getting leggy and woody, encourages dense new growth, and keeps the bush compact for another year. Never cut into old bare wood — sage rarely shoots from old stems.

6. 6

   Don't cut in autumn

   Pruning in late summer or autumn leaves soft new growth exposed to frost, which kills it. Stop cutting (other than picking small amounts for the kitchen) from August onwards. Let the bush harden off for winter.

7. 7

   Pick fresh year-round

   Sage is evergreen — pick fresh leaves any time, even in January. Strongest flavour is on fully-grown leaves before flowering (June). Older leaves at the base are tougher; pick fresher growth from the tips.

8. 8

   Replace every 4–5 years

   Even with regular pruning, sage gets woody at the base after about 5 years and stops producing usable leaves. Take 10 cm semi-ripe cuttings in late summer to start replacement plants (they root easily in gritty compost), or buy a new plant. Compost the old bush — it's done its work.

Aromatic foliage deters virtually all pests; very tough.