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Maiden grass 'Gracillimus'

Miscanthus sinensis 'Gracillimus' · Poaceae Popular

Maiden grass 'Gracillimus' (Miscanthus sinensis 'Gracillimus') in flower
Photo: Krzysztof Ziarnek, Kenraiz, via Wikimedia Commons (CC BY-SA 4.0)

A tall, rounded fountain of very narrow leaves, each with a silver midrib, with copper plumes in mid-autumn and buff foliage all winter.

Size
6 ft tall, 4 ft wide
Zones
5 to 9
Light
Full sun
Flowers
Mid September to early November
Pets
No toxicity recorded
Job in a bed
Specimen

Invasive in parts of North America. Self-seeds in warm climates, and seedlings revert to the vigorous wild type. Listed as invasive in many eastern states and regulated in New York. Check local guidance before planting. The planner never chooses it.

Where maiden grass 'Gracillimus' goes in a border

At 6 ft it belongs at the back of a bed. In the planner's ten height classes it is very tall (5 to 6½ ft).

Its job: specimen. A feature plant with a shape of its own. It stands alone with room around it, and repeats only at a distance.

For a century the most planted large grass, for its fine texture and perfect fountain shape. Because the species spreads by seed in the East, the planner will not choose it; switchgrass 'Northwind' and 'Cloud Nine' are native alternatives.

  • A large specimen grass
  • Screening
  • Winter structure

What to plant with maiden grass 'Gracillimus'

Plants recorded as good partners for it, and what each pairing does:

  • Black-eyed Susan: low enough (24 in) to stand in front of it.
  • Sedum 'Autumn Joy': in flower together for four weeks, from mid September; bold leaves against its fine ones; low enough (24 in) to stand in front of it.
  • Russian sage: flowers first, mid July to mid September, so the spot is never empty.

Choosing between it and a look-alike? Maiden grass 'Gracillimus' vs Switchgrass 'Northwind'.

Questions about maiden grass 'Gracillimus'

Does maiden grass 'Gracillimus' need sun or shade?

Maiden grass 'Gracillimus' grows in full sun (6 or more hours of direct sun a day).

It wants ordinary well-drained soil, of average fertility, and a good soak in dry spells. Once settled in, it stands drought.

What zones does maiden grass 'Gracillimus' grow in?

USDA zones 5 to 9. It is hardy to zone 5, which means it survives winter nights down to about −10 °F (−23 °C).

Gardening in Canada? Use the USDA zone for your town: Canada's own zone map uses different numbers.

When does maiden grass 'Gracillimus' flower in my zone?

In zone 5 it flowers mid September to early November. As an autumn flower it keeps much the same dates in every zone: it answers to shortening days and cool nights more than to the warmth of spring.

Roughly when maiden grass 'Gracillimus' is in flower
Zone 5Mid September to early November
Zone 6Mid September to early November
Zone 7Mid September to early November
Zone 8Mid September to early November
Zone 9Mid September to early November

Worked out from Hopkins' bioclimatic law: spring arrives about four days later for each degree of latitude north, and one zone is roughly two degrees. A warm spring or a cold one moves any garden two weeks either way.

How far apart should maiden grass 'Gracillimus' be planted?

3½ ft (100 cm) apart, from the middle of one plant to the middle of the next. That is a little closer than its full width of 4 ft (120 cm), so a group knits into one patch.

It grows 6 ft (180 cm) tall. Give it the full distance from anything taller, or it will lean out towards the light.

How many maiden grass 'Gracillimus' plants do I need?

At 3½ ft apart, set out in staggered rows:

  • 1 to fill 10 square feet (about 1 m²)
  • 4 for a single row 10 ft (3 m) long
  • 3 to fill a 4 × 8 ft bed on its own

In a mixed border, plant it as one, with clear ground around it: a feature plant is seen as an object, and a group of them is a thicket.

Is maiden grass 'Gracillimus' poisonous to dogs and cats?

No toxicity is recorded for dogs, cats, horses or people, according to NC State Extension.

"Not toxic" is not "edible": a pet that eats a lot of any plant can be sick.

What can I plant instead of maiden grass 'Gracillimus'?

Maiden grass 'Gracillimus' is listed as invasive in parts of North America, so the planner never uses it. These do the most similar job, and are native:

Matched the way the planner's Swap button matches plants: the same job in a bed, then size, then flowering time.

Do deer eat maiden grass 'Gracillimus'?

Mostly not. NC State lists it as resistant to deer. No plant is proof against a hungry deer in a hard winter, but this one is low on the menu.

Will maiden grass 'Gracillimus' spread?

It seeds itself about; the risk of it taking over is moderate. Self-seeds in warm climates, and seedlings revert to the vigorous wild type. Listed as invasive in many eastern states and regulated in New York. Check local guidance before planting.

It is listed as invasive in parts of North America, and the planner never chooses it.

What does maiden grass 'Gracillimus' look like in winter?

Maiden grass 'Gracillimus' turns the colour of straw and, left uncut, stands through the winter, with seed for the birds. Cut it down in late winter, before the new shoots come up.

Is maiden grass 'Gracillimus' good for bees and butterflies?

Maiden grass 'Gracillimus' is visited by songbirds.

More Miscanthus

Every fact on record

Type
Grass
Size
6 ft (180 cm) tall, 4 ft (120 cm) wide
Plant
3½ ft (100 cm) apart
Height class
Very tall (5 to 6½ ft)
Place in the bed
Back
Flowers
Mid September to early November; feathery plumes; tan
Leaves
Fine texture, herbaceous; green
Shape
Arching, self-seeding
Hardy in
USDA zones 5 to 9
Light
Full sun
Soil
Average, well-drained
Water
Moderate
Feeding
Light, in spring
Family
Poaceae
Comes from
China to Malaysia, Russian Far East to Temperate E. Asia
Attracts
Songbirds
Stands up to
Deer, drought, humidity, salt, wet soil

Checked against NC State Extension. Flowering times are for zone 5: later in colder zones, earlier in warmer ones. Toxicity and spread information is a general gardening guide, not veterinary or medical advice, and invasive status varies by region. If a person or pet eats a plant, contact poison control or a vet. Check your local invasive species list before planting anything with a spread warning.