Pitcher sage

Sun

Full sun; light shade is tolerated, but stems are more likely to flop.

Water

Water regularly during establishment, allowing the soil surface to dry between waterings. Once established, water during prolonged drought; avoid persistently wet soil.

Soil

Well-drained sandy, gravelly or loamy soil, including relatively poor soil. Clay is suitable only where drainage is good, especially in winter.

Height

3-5 ft (0.9-1.5 m)

Spread

2-3 ft (0.6-0.9 m)

Flowers

Late summer to autumn; loose spikes of sky-blue, two-lipped flowers.

Foliage

Opposite, narrow green leaves on slender, square stems; foliage dies back in winter.

Growth

Moderate; usually forms a substantial flowering clump within two or three growing seasons.

Care needed

Low

• Pollinators
• Deer resistant
• Drought tolerant
• Heat tolerant
• Wildlife
• Low allergen

Northern hemisphere months. In Australia, shift them by six.

Difficulty

Easy

Toughness

Very tough

Pick your zone, country, light and whether you have pets.

1. Planting day

   1 ft (0.3 m)

2. After 1 year

   2 ft (0.6 m)

3. After 2 years

   3 ft (0.9 m)

4. After 3 years

   4 ft (1.2 m)

   full size

About 3 years to full size.

From a typical nursery size, at an average rate for this kind of plant. A rule of thumb, not a forecast.

Cats and dogs

Safe

Growth rate

Moderate

• Water deeply through the first growing season whenever the root zone becomes dry.
• Avoid routine feeding; rich soil and high-nitrogen fertiliser encourage weak, floppy stems.
• Keep the crown free of thick, damp mulch, particularly in wet-winter climates.
• Install discreet supports in spring on exposed sites, or let sturdy neighbouring perennials support the stems.
• Divide in spring if a clump becomes crowded or develops a weak centre.

Pruning. For shorter, sturdier plants, cut stems back by about one-third in late spring or early summer, before flower buds develop; flowering may be delayed. Leave spent stems standing over winter if wanted, then cut them close to ground level in late winter or early spring before new growth develops.

Early spring

Cut down old stems before new shoots lengthen.

Spring

Plant or divide into well-drained soil, and water thoroughly.

Late spring

Add supports or shorten stems by one-third if a compact plant is needed.

Summer

Water young plants during dry spells; avoid feeding established clumps.

Late summer

Enjoy flowering and collect seed from drying flower spikes if wanted.

Autumn

Leave stems for winter structure, or remove seed heads where seedlings are unwanted.

• Plant through prairie-style borders with little bluestem and coneflowers for late-season colour and movement.
• Use in the middle or back of a sunny border, where its open stems allow glimpses of plants behind.
• Combine with yellow black-eyed Susans or goldenrods for a strong blue-and-gold autumn display.
• Repeat small groups through a dry gravel garden for a light, informal effect.

Garden styles it suits: Native meadow, Midwest prairie, New perennial (prairie), Pollinator garden, Cottage garden and Dry gravel garden.

Plant it with: Little bluestem, Prairie dropseed, Purple coneflower, Black-eyed Susan, Butterfly weed and Showy goldenrod.

Wildlife: Flowers provide late-season nectar and pollen for bees, including bumblebees, and may also attract butterflies. Standing stems offer shelter for small invertebrates.

• Flopping stems: provide full sun, avoid fertiliser and excessive irrigation, and shorten stems in late spring or add supports.
• Root or crown rot in wet soil: improve drainage or move to a raised planting area; do not keep the crown buried under damp mulch.
• Powdery mildew: improve airflow, avoid crowding and remove badly affected foliage.
• Slugs and snails on spring shoots: check young growth during damp weather and use hand removal or locally approved controls.

Not known to be toxic to people, cats, dogs or horses. Species-specific safety information is limited, so do not treat the leaves or flowers as food or substitute them for culinary sage.

• Mealycup sage (Salvia farinacea)

  Usually shorter and more compact, with denser flower spikes and conspicuously pale, mealy-looking flower stalks and calyces; pitcher sage has a looser, airier habit.

• Bog sage (Salvia uliginosa)

  Also bears sky-blue flowers, but has broader, clearly toothed leaves and spreads strongly by underground stems; it prefers much moister soil.

• Russian sage (Salvia yangii)

  Has silvery, often deeply cut foliage and woody stems, rather than pitcher sage's narrow green leaves and herbaceous stems.

The species name azurea means sky-blue, referring to the flowers.

Propagation. Sow seed in autumn outdoors, or give seed a period of cold, moist treatment before spring sowing; germination can be variable. Divide established clumps in spring, or take softwood cuttings from non-flowering shoots in late spring.

Accepted botanical name

Salvia azurea

Native range

Alabama, Arizona, Arkansas, Colorado, Florida, Georgia, Illinois, Kansas, Kentucky, Louisiana, Mississippi and Missouri.

Measured

Soil pH 6 to 8. Average height 88 cm.

Sources: GBIF (CC BY 4.0) and Trefle (CC BY 4.0). The care and design notes are LandscapeGPT's own.