How to Grow Dendranthema — Chrysanthemum

Dendranthema morifolium
Dendranthema morifolium

Dendranthema is a genus of perennials that produce daisylike flower heads that can be white, yellow, pink, or purple. The ray florets (petals) are borne singly or in loose clusters. Dendranthema is a genus of 20 species that were once classified as chrysanthemums.

Dendranthema bears aromatic, somewhat fleshy dark green leaves that are lobed or palmate. Flowers are .5 to 3 inches (1-8cm) across and are produced singly or in loose corymbs.

Grow Dendendranthema in herbaceous or mixed borders or in a rock garden.

Dendranthema are native to Europe and Central and East Asia.

Dendranthema morifolium
Dendranthema morifolium

Get to Know Dendranthema 

  • Plant type: Pernnial 
  • Growing zones and range: Zones 5 to 9 
  • Hardiness: Hardy to Zone 5
  • Height and width: 12 inches (30cm) tall and 18 inches (45cm) wide
  • Form and habit: Erect perennials 
  • Foliage: Aromatic, somewhat fleshy leaves that are lobed in a palmate fashion appear alternately.
  • Flowers: Daisylike flower heads have white, yellow, pink, or purple ray florets (“petals”) and are borne singly or in loose clusters 
  • Bloom time: Mid- to late summer and fall 
  • Uses: Add to herbaceous or mixed border or rock garden  
  • Garden companions: Vertical plants, such as purple coneflower, crocosmia, gas plant, ironweed, and ornamental grasses 
  • Common name: Chrysanthemum 
  • Botanical name: Dendranthema 
  • Family name: Asteraceae 
  • Origin: Europe and Central and East Asia

Where to Plant Dendranthema 

  • Plant Dendranthema in full to half sun. 
  • Plant Dendranthema in rich, moist, well-drained soil; sandy soil is ideal, and plants tend to be short-lived in heavy clay. 
  • Dendranthema do not tolerate wet soil but will grow well in windy locations if they have plenty of moisture.  

When to Plant Dendranthema 

  • Plant Dendranthema blooms in mid- to late summer and fall, depending on the variety and your maintenance practices.  
  • Plant Dendranthema 4 to 6 weeks before the first expected freeze in your area.  

Planting and Spacing Dendranthema 

  • Space Dendranthema 18 inches (45cm) apart.
  • Start seed indoors in early spring.

How to Water and Feed Dendranthema 

  • Give Dendranthema average water. 
  • Feed Dendranthema with an all-purpose organic fertilizer in spring; apply 50% more fertilizer than for average perennials. 
Dendranthema indicum, Chrysanthemum indicum
Dendranthema indicum, Chrysanthemum indicum

How to Care for Dendranthema 

  • Pinch Dendranthema several times between midspring and midsummer for bushy, short, later-blooming plants. 
  • Northern gardeners should stop pinching by mid-July; southern gardeners, by early August. 
  • Unpinched plants may need staking.  
  • In Zones 5 to 6, wait until early spring to cut back plants or cut them down in fall and cover roots with an airy mulch over winter.  
  • Divide plants every 2 years in spring to keep clumps vigorous; they have offsets.  
  • Replant divisions in a different location to prevent pest buildup. 

Dendranthema Pests and Diseases 

  • Dendranthema is susceptible to attacks by aphids, Japanese beetles, mites, slugs, snails, and nematodes.  
  • Dendranthema can develop leaf spot, mildew, and rust, especially on older, crowded clumps.  
  • Rabbits, deer, and woodchucks graze on the flower buds.  

Dendranthema Propagation 

  • Propagate Dendranthema by dividing plants in spring or after they flower in fall, or by sowing seeds.  

Dendranthema Varieties to Grow 

  • Dendranthema weyrichii, formerly chrysanthemum weyrichii, a 1-foot (.3m) tall species that forms 1.5 foot (.5m) wide mounds of five-lobed leaves topped with 2 inch (5.1cm) wide daisies in late summer and fall with white or pink ray florets and yellow centers.  
  • ‘Pink Bomb’ bears pink flowers.  
  • ‘White Bomb’ has pink-tinged ray florets. Zones 3 to 8.   
  • Nipponanthemum nipponicum, Montauk daisy, is a semievergreen woody perennial that grows 2-3 feet (.6-.9m) tall with white daisies in fall. It tolerates wind and salt in Zones 5 to 9; do not pinch in Zones 5 to 6.  

Related article:

How to Grow Chrysanthemum

Related Articles:

Deschampsia cespitosa, hair grass

How to Grow Deschampsia — Hair Grass

Bignonia, cross vine

How to Grow Bignonia — Cross Vine