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Common Name: Blue Spider Wort
Close-up of the flower
Photograph by: Not known
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Commelina coelestis is a perennial plant that can grow up to 0.45 metres tall.
It has edible uses.
Southern N. America - Mexico.
Prefers a light well-drained loam with added leafmold and a warm sunny position[
]. Established plants are drought tolerant[
A very ornamental plant[
], 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[
]. 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[
This plant is very attractive to slugs[
Tubers - cooked[
]. 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[
]. By no means a favourite root crop, but acceptable in small quantities[
Seed - sow early spring in a greenhouse. The seed usually germinates in 4 - 5 weeks at 20°c[
]. 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[
]. 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[
Cuttings during the growing season. These root very easily[