Commelina dianthifolia

Day flower

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Key information

Plant type

Tender perennial

Flower colour






Skill level


photo by Chris Burrows, copyright GAP Photos (306499)

Plant details

This has intense, gentian blue flowers, 2.5cm (1in) across, but it is not reliably hardy. If you're lucky enough to live in a very sheltered area, it should flower in the first year and then produce tubers and spring back to life the following year, with a good display of blooms. Where it can be treated as hardy, grow it in containers, rock gardens and the border. Otherwise, grow it in a greenhouse.

Family: Commelinaceae

Genus: Commelina

Species: dianthifolia

Plant type: Tender perennial

Flower colour: Blue

Foliage colour: Mid-green

Feature: Flowers

Sun exposure: Full sun, Partial shade

Soil: Well-drained/light

Hardiness: Tender

Skill level: Experienced

Height: 30cm

Time to divide plants: March to April

Reader reviews


I originally grew this from seed and they grew quickly. They have managed to form tubers and survived 3-4 winters here in Berkshire. They are growing in a loam soil that is south facing so thats probably why. Sadly they dont sprout again until september. Ive sown some more so I can get them flowering earlier and dig the tubers up to get them flowering earlier. The shade of blue is indeed impressive. Be warned that if happy they will pop everywhere as they are very good at spreading their seed.

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