Gray-headed coneflower

Sun

Full sun is best; tolerates light shade but may flower less and lean.

Water

Water regularly during establishment. Once established, it tolerates dry spells; water during prolonged drought for better flowering.

Soil

Well-drained sandy, loamy or clay soil, preferably moderately fertile. Tolerates lean soil and seasonal dryness, but not persistent waterlogging.

Height

3-5 ft (0.9-1.5 m)

Spread

1.5-2 ft (0.45-0.6 m)

Flowers

Summer into early autumn; yellow, downward-curving petals surround prominent cones that turn from gray to brown.

Foliage

Green, rough-textured leaves divided into narrow lobes; lower leaves are larger than those near the flowers.

Growth

Moderate to fast; seed-grown plants may take until their second year to flower well.

Care needed

Low

• Pollinators
• Deer resistant
• Drought tolerant
• Cold hardy
• 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

   2.2 ft (0.68 m)

3. After 2 years

   3 ft (1.1 m)

4. After 3 years

   4 ft (1.2 m)

   full size

About 2 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

Native to

the US and Canada

Growth rate

Fast

• Water new plants deeply when the root zone begins to dry during their first growing season.
• Avoid routine fertilizer; rich feeding encourages tall, floppy stems.
• Keep mulch light and clear of the crown, especially in damp climates.
• Use a discreet support early in growth if plants lean in exposed sites or rich soil.
• Divide crowded clumps in spring when flowering declines or the centre becomes sparse.

Pruning. Leave stems and seedheads standing through winter for birds and structure, then cut them to 2-4 in (5-10 cm) above the ground in late winter or early spring. Remove spent heads earlier if you want to limit self-seeding.

Late winter

Cut back old stems before new shoots develop, leaving a short stub above each crown.

Spring

Plant nursery-grown plants and divide established clumps if needed; water divisions thoroughly.

Late spring

Install supports where needed before stems grow tall.

Summer

Water young plants during dry weather and check for leaning stems.

Early autumn

Keep seedheads for birds, or remove them before seeds fall to reduce seedlings.

Late autumn

Sow seed outdoors in a prepared seedbed or pots so winter cold can help break dormancy.

• Plant in loose groups through a sunny meadow border with little bluestem and switchgrass.
• Use behind shorter perennials so the tall flower stems rise above lower planting.
• Combine with purple coneflowers and blazing stars for contrasting flower shapes and colours.
• Leave seedheads among ornamental grasses for autumn and winter structure.

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

Plant it with: Little bluestem, Switchgrass, Purple coneflower, Wild bergamot, Prairie blazing star and Butterfly weed.

Wildlife: Flowers attract bees, butterflies and other pollinating insects. Finches and other seed-eating birds feed on the mature seedheads.

• Flopping stems: provide full sun, avoid fertilizer and use early supports where soil is rich or the site is exposed.
• Powdery mildew or leaf spots: allow good air circulation, water at soil level and remove badly affected fallen foliage.
• Crown or root rot in wet soil: improve drainage or move plants to a better-drained position.
• Unwanted seedlings: remove seedheads before they shed and pull surplus seedlings while small.

Not known to be toxic to people, cats, dogs or horses. No particular plant part is established as poisonous, but species-specific safety information is limited; do not treat it as an edible plant.

• Mexican hat (Ratibida columnifera)

  Its central cone is much longer and narrower, forming a tall cylinder; petals may be yellow, red-brown or both. Gray-headed coneflower has a shorter, rounded to oval cone.

• Cutleaf coneflower (Rudbeckia laciniata)

  Usually taller, with broader leaf lobes and greenish cones. Gray-headed coneflower has more narrowly divided leaves and gray-brown cones.

• Black-eyed Susan (Rudbeckia hirta)

  Usually shorter, with mostly undivided, hairy leaves and dark brown centres; its petals generally spread outward rather than hanging strongly downward.

The name pinnata refers to the feather-like division of the leaves, while gray-headed describes the cone's grayish appearance before it matures.

Propagation. Divide clumps in spring, or grow from seed. Sow outdoors in autumn, or give seed about 4-8 weeks of cold, moist treatment before spring sowing; press it into the surface and cover only lightly.

Accepted botanical name

Ratibida pinnata

In the US and Canada

Native in Canada and the lower 48 states.

Native range

Alabama, Arkansas, Florida, Georgia, Illinois, Indiana, Iowa, Kansas, Kentucky, Louisiana, Masachusettes and Michigan.

Measured

Soil pH 5.6 to 6.8. Average height 109 cm.

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