Commelina coelestis - Willd.
Common Name Blue Spider Wort, Commelina
Family Commelinaceae
USDA hardiness 8-11
Known Hazards None known
Habitats Not known
Range Southern N. America - Mexico.
Edibility Rating  
Other Uses  
Weed Potential No
Medicinal Rating  
Half Hardy Well drained soil Moist Soil Full sun

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Commelina coelestis Blue Spider Wort, Commelina
Commelina coelestis Blue Spider Wort, Commelina
Physical Characteristics
 icon of manicon of flower
Commelina coelestis is a PERENNIAL growing to 0.5 m (1ft 8in) by 0.3 m (1ft).
It is hardy to zone (UK) 9. It is in flower from Jul to September, and the seeds ripen from Aug to October. The flowers are hermaphrodite (have both male and female organs)Suitable for: light (sandy) soils and prefers well-drained soil. Suitable pH: acid, neutral and basic (alkaline) soils. It cannot grow in the shade. It prefers dry or moist soil and can tolerate drought.


 Cultivated Beds; South Wall. By. West Wall. By.
Edible Uses
Edible Parts: Root.
Edible Uses:

Tubers - cooked[2]. Starchy[105]. The plant forms a clump of thin finger-shaped roots about 7 - 10cm long. These are easily harvested, though overall yields are low. The roots have a fairly bland flavour and an acceptable texture[K]. By no means a favourite root crop, but acceptable in small quantities[K].
Medicinal Uses
Plants For A Future can not take any responsibility for any adverse effects from the use of plants. Always seek advice from a professional before using a plant medicinally.

None known


Other Uses
None known
Cultivation details
Prefers a light well-drained loam with added leafmold and a warm sunny position[42, 111, 190]. Established plants are drought tolerant[190]. A very ornamental plant[1], it is not very winter hardy in Britain so the roots are best dug up in autumn and stored like dahlias in a cool frost free place[1]. When grown in a light well-drained soil and mulched well, the roots usually survive the winter outdoors, at least in the milder areas of the country[111, K]. This plant is very attractive to slugs[K].
Seed - sow March in a greenhouse. The seed usually germinates in 4 - 5 weeks at 20°c[164]. Prick the seedlings out into individual pots as soon as they are large enough to handle and plant out in late spring or early summer after the last expected frosts. Division in early spring. The root clump consists of a number of finger-shaped roots joined together at their tops. When dividing this, it is important to ensure that each division has at least one growing bud at the top[111, K]. Pot up the divisions and grow them on in a greenhouse or cold frame until they are established and then plant them out in late spring, after the last expected frosts[K]. Cuttings during the growing season. These root very easily[200].
Other Names
Found In
Weed Potential

Right plant wrong place. We are currently updating this section. Please note that a plant may be invasive in one area but may not in your area so it’s worth checking.

Conservation Status
IUCN Red List of Threatened Plants Status :
Related Plants
Latin NameCommon NameEdibility RatingMedicinal Rating
Commelina communisDay Flower, Asiatic dayflower32
Commelina dianthifoliaBirdbill Dayflower21
Commelina elliptica 20
Commelina erectaSlender Day-Flower, Whitemouth dayflower20
Commelina erecta angustifoliaWhitemouth Dayflower21
Commelina tuberosaCommelina20
Commelina virginicaVirginia Day-Flower20
Tradescantia virginianaSpiderwort, Virginia spiderwort21


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Botanical References
Links / References
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Readers comment
   Jun 29 2013 12:00AM
I bought this plant two weeks ago because the bloom was a beautiful, bright, true blue (not purple as shown) & had interesting features. I reside in a hot, dry climate so, it is thriving in the sun. However, it blooms in the morning and dies in the afternoon. The bud stock are lined up on a short a stem, enveloped in clam shell-like leaf. As the flower dies, it rotates to the back of the leaf and the next bloom emerges a few days later. This continues until all the blooms have expired. It is a tidy plant, hiding its spent flowers rather than dropping them. eaueni
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Subject : Commelina coelestis  

Plant Uses

Edible Uses
Medicinal Uses
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