Centaurea phrygia | wig knapweed

Regular price: $8.99
Regular price
Sale price: $8.99

Shipping calculated at checkout.

Grown from seed in living soil without the use of pesticides, chemicals, or carbon fuels.

ships spring 2026

The perennial cornflowers have gorgeous feathery, pompom flowers held on long stems that call in the pollinators.

Wig knapweed (Centaurea phrygia) is a European native wildflower that can be found growing along roadsides, fields, and edges of cultivated fields. We love this tough perennial for its magenta hued flowers and interesting seed pods. It combines well with other wildflowers and grasses for an informal look.

Zones: 5 to 8
Family: Asteraceae
Type: Perennial
Height: 36 to 48 in.
Spread: 12 to 24 in.
Exposure: full sun
Conditions: average
Bloom Time: July to August
Bloom Color: purple to magenta
Native Range: Europe to W. Siberia and Iran

4" pot

Special Characteristics

Pollinator favorite
Deer-resistant

image credits

Ghislain118 (AD) http://www.fleurs-des-montagnes.net, CC BY-SA 3.0, via Wikimedia Commons
Matti Virtala, CC0, via Wikimedia Commons
Matti Virtala, CC0, via Wikimedia Commons
C T Johansson, CC BY-SA 3.0, via Wikimedia Commons
Bogdan Giuşcă, CC BY-SA 3.0, via Wikimedia Commons
Ivar Leidus, CC BY-SA 4.0, via Wikimedia Commons
Ivar Leidus, CC BY-SA 4.0, via Wikimedia Commons
Agnieszka Kwiecień, Nova, CC BY-SA 4.0, via Wikimedia Commons
Karl Gruber, CC BY 3.0 AT, via Wikimedia Commons

Ordering information

Preorders

You may place your order anytime to reserve plants for fall 2025 shipment. If you place multiple orders, we will combine plants into one box (or as many as needed) and any extra shipping charges will be refunded.

We will resume shipping plants as soon as temperatures cool in our location and yours.

We will check in with you a week before shipping to make sure you receive your plants at a time that is convenient for you.

Shipping

Live plants ship in spring and fall only. Plants may ship dormant, depending on variety and season. Shipping costs are most reasonable when bundling like size plants.

4-inch: 1-6 plants ship for $15.00 / 7-13 plants ship for $18.00 / 14-30 plants ship for $40.00
1-gal: 1-2 plants ship for $18.00 / 3-4 plants ship for $25.00 / 5-6 plants ship for $40.00
trees & shrubs: $27.00-$40.00 each, height dependent
seeds: $6.75 or free with orders over $15.00

We regret that we cannot ship internationally or to the following states: AK, AZ, CA, CO, FL, HI, ID, MT, NV, OR, UT, or WA.

Nursery pick up

Plants can be collected from the nursery Monday through Sunday from 10am-4pm in Spring, Summer, and Fall. We prefer 24 hour notice to get your order together and will email you when ready for collection.

Plant Sizes

We most commonly use the following pot sizes for perennials:

4-inch pot: 3.5" H x 3.5" W x 3.5" D
2-quart pot: 6" H x 5.25" W x 5.25" D
1-gallon pot: 6.87" H x 8" Dia (this is a true one gallon pot, not the smaller 'trade' one gallon pot used by many nurseries)

Check out our illustrated pot size guide here.

Representative trees & shrubs are photographed in their pots and posted on each plant page.

Sustainability

Sustainability is at the heart of what we do at The Old Dairy. We grow all of our plants outdoors without the use of chemicals, fertilizers, carbon fuels, or peat.

Many of our perennials are grown in the ground and dug upon order (this is especially true for larger sizes). This practice allows us to grow stronger, healthier plants using native soil, and ultimately reduces our impact on the environment.

Our open-pollinated seeds are collected from plants in our mother beds, which have never been treated with chemicals or sprays of any kind.

Read all about our sustainable practices here.