Field Scabious — (c) Kieran Roy Powell, some rights reserved (CC BY)

Is this in your garden?

Take a photo and Garden Rescue will tell you what you actually have, and what it needs this week.

Field Scabious

Knautia arvensis

Also called Pincushion Flower, Bluebuttons, Meadow Scabious

Flower Identified 1 time

About Field Scabious

Field Scabious is a hardy perennial with soft lilac pincushion blooms on tall, airy stems. Bees and butterflies love it all summer long. It thrives in well-drained, sunny spots and tolerates dry spells once settled.

Type: Herbaceous perennial
Height: 24–36 in
Spread: 18–24 in
Sun: Full sun
Water: Low to medium once established
Soil: Well-drained, chalky or sandy loam
Hardiness: Hardy to -20 °F
Flowers: July to September
Growth: Clump-forming with tall flowering stems
Toxicity: Not known to be toxic
Native to: Europe and western Asia

How to recognise it

Dome-shaped lilac-purple flower heads
Slender, wiry stems with rough hairs
Deeply lobed green leaves at the base
Bristly green seed heads after flowering

Caring for Field Scabious

Watering

Every 8 days

How often: Once every 7 to 10 days
How much: Soak the root zone with 1 gallon per clump
When: Morning
Tips: Water the soil directly. Sprinklers can make the tall stems flop over.

Feeding

How often: Once a year in spring
What to use: Organic compost or balanced slow-release feed
When: Early spring
How: Scatter 1 handful around the base of the clump

Pruning

When: Autumn or late winter
How: Cut spent flower stems down to basal leaves to tidy up, or leave seed heads for birds.
Tips: Always use clean, sharp hand pruners.

Jobs it will ask for

Snip off old flower heads Cut faded flowers back to a side bud to squeeze out a few more autumn blooms.
Clear fallen dry debris Remove dry stems around the base to keep good air flow as wet autumn weather arrives.

Through the year

Spring

Feed the clump with a layer of compost when green rosettes appear.

Summer

Deadhead spent blooms regularly to keep new flowers coming all summer.

Autumn

Let late seed heads ripen to feed visiting garden birds.

Winter

Cut old hollow stems to the ground before new growth starts in spring.

What to watch for

Powdery mildew: Thin out crowded stems and avoid wetting leaves when watering.
Flopping stems: Support tall stems early in summer with twiggy hazel branches or plant rings.

Reference photos

Compare what's in your garden with confirmed photos of Field Scabious.

Photos from iNaturalist contributors.

Written by Garden Rescue from photo identifications, in US units. Local advice from your extension service or garden centre beats a general guide.