Gladiolus communis ssp byzantinus / / Byzantine Gladiolus / Whistling Jack / Bulbs

(Code: JPA_029)
Gladiolus communis ssp byzantinus /  / Byzantine Gladiolus / Whistling Jack / Bulbs

One of the few hardy and early flowering Gladioli, with brilliant wine-coloured flowers in Maya nd June.  Plants have narrow sword-shaped leaves and grow to an impressive 60-90cm in height.  They have good strong stems, and they look good growing in groups or amongst other plants in a border.  They grow well in pots.

Whistling Jacks prefer a sunny situation and fertile well-drained soil, with sufficient water in early summer.  Plants grow in less well-drained soil with added grit.  They will naturalise in warmer gardens in the right conditions and can be seen growing wild in Cornwall.  


Pack of 15 bulbs (corms).  Plant bulbs in autumn or spring.  Plant in spring in very cold gardens.  Bulbs can be left in the ground over winter once planted, with a topping of mulch to protect from heavy frosts. These are nursery grown bulbs that flower in the first year. Planting instructions and a colour photo are printed on the packet.  

SOLD OUT - autumn 2018.

Hardiness Hardy deciduous perennial (forms corms) (RHS Hardiness H5)
Flowers May to June
Height 60 - 90cm
Spread 15 - 20cm
Conditions  Sun and well drained soil

Plant the bulbs in autumn or spring 10-15cm deep and 10-15cm apart in unfrozen ground.  In pots, plant bulbs closer together at about 10cm apart.  Add grit or sand if necessary to improve drainage and to help prevent the bulbs from rotting.  In clay soil, add grit or sand to the bottom of the planting hole.  

Grow Water plants during dry spells in spring and early summer when plants are growing and flowering.    Cut back flower stems when they die back.  Leave the leaves to die back naturally after flowering before removing later in summer.  Leave bulbs in the ground over winter.  In very cold gardens, bulbs can be lifted in autumn, kept in a cool and dry place protected from frost, and replanted in spring.  Offsets can be removed from mature plants in late summer for growing-on into new plants.