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Melancholy Thistle in the GardenTags plant encyclopedia

Cirsium heterophyllum

 

Melancholy Thistle

Melancholy Thistle is similar to the Brook Thistle but it lacks spines. The plant grows 45 to 120 cm tall, and forms creeping runners. The stem is grooved but unwinged, more-or-less branchless, and cottony. The leaves are green and hairless above, thick white-felted underneath. The flowers are red-purple, and appear through mid-summer.

Contributed by @schefflera

 
plant Features
  • Melancholy Thistle likes full sun

    Full sun

  • Melancholy Thistle likes occasional watering

    Occasional watering

  • Melancholy Thistle is full frost hardy: 5f (-15°c)

    Full Frost Hardy: 5F (-15°C)

  • Melancholy Thistle likes moist and free draining

    Moist and free draining

 
plant information

Common name

Melancholy Thistle

Latin name

Cirsium heterophyllum

type

Herbaceous Perennials

family

Asteraceae

ph

5.0 - 7.5 Acid - Neutral

  • Light

    Melancholy Thistle likes full sun

    Full sun

  • Frost

    Melancholy Thistle is full frost hardy: 5f (-15°c)

    Full Frost Hardy: 5F (-15°C)

  • Soil

    Melancholy Thistle likes moist and free draining

    Moist and free draining

  • Water

    Melancholy Thistle likes occasional watering

    Occasional watering

Plant & bloom calendar

  •  
    Best time to plant
  •  
    When the plant will bloom

full grown dimensions

The size of a fully grown Melancholy Thistle is 0.60meters x 1.20meters 0.60 M 1.20 M

Cirsium heterophyllum

Melancholy Thistle is similar to the Brook Thistle but it lacks spines. The plant grows 45 to 120 cm tall, and forms creeping runners. The stem is grooved but unwinged, more-or-less branchless, and cottony. The leaves are green and hairless above, thick white-felted underneath. The flowers are red-purple, and appear through mid-summer.


Planting

From Early Spring TO Mid Spring

Plant young plants out in spring in full sun and in a well prepared, moist but well drained soil. To prevent spreading, you can restrict spread by planting in a large container which can be sunk into the soil in the growing position.

 

Flowering

From Early Summer TO Mid Autumn

Flowers appear in early Summer and, if dead-headed, will continue all through Summer to first frosts.

 

Propagating by division

From Mid Autumn TO Late Autumn

After approximately three years, once herbaceous perennial varieties have become established clumps they should be divided in order to retain vigour, and to propagate the plant. The simplest method is to carefully dig around the clump and gently pull it apart into fist sized pieces and re-plant immediately. The divisions can be re-planted straight into the ground, or, for more reliable establishment, into pots to overwinter before being planted out in the following Spring.

 
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