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Gladiolus (Gladiole)

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Gladiolus comprises some of the most beautiful and easy to cultivate flowering bulbs, preferring rather inorganic soil which should be kept rather dry in winter and moist in spring and summer. Some are winter growing in nature (several South African species) and will lose leaves at low temperatures in winter, but will emerge again in late spring. Species with a hardiness of USDA 7 or 8 are best cultivated as pot plants in a cool greenhouse or wintergarden, thus they will prove as free flowering. All species with a hardiness of USDA 6 are fully winter hardy in Central Europe without any additional winter protection.
Sow at some 10°C preferably in spring (in pots outside) or autumn (in a cool and frosfree greenhouse). Keep pots under cool, yet frostfree conditions and soil always slightly moist. Most Gladiolus seed require a prolonged cooling period for several months before they will germinate with raising temperatures in late spring. Several species tend to have a hypogeal germination, i.e. they make a small corm underground in the first year before the first leaf will emerge in the second year. Pot cultivation for two years before passing on to the open garden, plant bulbs rather deep (some 15cm) to protect them from freezing through. In winter apply some dry mulch layer as additional protection measure. If plants are cultivated in pots, keep them in a cool, yet frostfree spot during winter. Winter dormant species may be placed in shade and soil can be kept rather dry, wintergreen plants require careful watering and full sun.
20 seeds per package.
Articles
Gladiolus longicollis

Gladiolus longicollis

50 (80)cm, 2 clasping leaves, on a single flower spike with white or creamy yellow flowers. USDA Climate Zone 7. VI-VIII.
20 seeds per package.

price (plus Shipping Costs)
seed package 2985 € 4,99
Gladiolus maculatus

Gladiolus maculatus

30 (50)cm, a nice species with creamy-white petals heavily dotted and marked with reddish to brownish-red spots. For any rich, well drained substrate in full sun. Requires some good winter protection (e.g. thick dry mulch layer). In colder regions preferably grow in pots under frostfree conditions in a cool greenhouse or wintergarden. USDA Climate Zone 8. VII-VIII.
20 seeds per package.

price (plus Shipping Costs)
seed package8871 € 7,99
Gladiolus marlothii

Gladiolus marlothii

80 (110)cm, most ornamental, slightly fragrant pale bluish-mauve flowers with small lilac spots and lower petals with a lemon base. V-VII.
20 seeds per package.

price (plus Shipping Costs)
seed package 0062 € 4,99
Gladiolus meliusculus

Gladiolus meliusculus

15 (20)cm, a dwarf species with narrow, grass-like leaves and honey scented pink, salmon-red to brick red flowers and yellow lower petals edged with purple. For any rich, well drained soil in full sun. Requires a very good winter protection (e.g. thick dry mulch layer), alternatively grow in an unheated wintergarden or greenhouse. USDA Climate Zone 9. VI.
20 seeds per package.

price (plus Shipping Costs)
seed package2986 € 5,99
Gladiolus miniatus

Gladiolus miniatus

15 (25)cm,, has salmon red, pink or yellowish cream flowers with darker stripes on short upright stems. Native of coastal rocky soils from Hermanus to Agulhas. For any rich, well drained soil in a sunny spot. Requires a good winter protection (i.e. dry mulch layer). Best grown in pots under frostfree conditions in a cool greenhouse or wintergarden with reduced watering and a winter minimum of some 5°C. VII-VIII.
20 seeds per package.

price (plus Shipping Costs)
seed package 4991 € 4,99
seed package
Gladiolus ochroleucus

Gladiolus ochroleucus

30 (50)cm, evergreen leaves under frostfree conditions and pale rose flowers. In the open garden, leaves will die down from freezing, yet it will usually emerge again in late spring. For any rich, well drained soil in full sun. In colder regions give some good winter protection (e.g. a thick dry mulch layer) or grow in pots in a coll, yet frostfree wintergarden or greenhouse. USDA Climate Zone 8. VIII-IX.
20 seeds per package.

price (plus Shipping Costs)
seed package 2987 € 4,99
Gladiolus oppositiflorus ssp. salmoneus

Gladiolus oppositiflorus ssp. salmoneus

80 (150)cm, native to the north-eastern Cape (Barkely Pass) and S Natal growing in moist rocky mountain grassland. Has very attractive large (10cm) salmon-pink flowers from the E Cape, growing in cliffs. V-VII.
20 seeds per package.

price (plus Shipping Costs)
seed package 2988 € 4,99
Gladiolus palustris (Marsh Gladiolus)

Gladiolus palustris (Marsh Gladiolus)

90 (120)cm, Marsh Gladiolus is native of semi-moist meadows in central and NW Europe. As the related Gladiolus communis ssp. communis it has bright pink flowers with a white throat and stripes. Very similar to Gladiolus italicus, yet the seeds of Gladiolus palustris are smaller and winged, whereas those of Gladiolus italicus are larger and not winged. In contrast to Gladiolus communis ssp. communis the winged seeds of Gladiolus palustris are about twice the size. Easily cultivated in any humus rich, slightly moist, yet very well drained soil in partial shade to full sun. Completely winter hardy in Central Europe. The seeds are from true-to-type plants. USDA Climate Zone 6. V-VI.
20 seeds per package.

price (plus Shipping Costs)
seed package 3521 € 4,99
seed package
Gladiolus patersoniae

Gladiolus patersoniae

30 (50)cm, a medium tall species from the South-Western Cape region with showy, rather closed and almost bell-shaped mauve flowers. For any rich, well drained substrate in full sun. Requires some good winter protection (e.g. thick dry mulch layer). In colder regions preferably grow in pots under frostfree conditions in a cool greenhouse or wintergarden. USDA Climate Zone 8. VII-VIII.
20 seeds per package.

price (plus Shipping Costs)
seed package8870 € 7,99
Gladiolus permeabilis

Gladiolus permeabilis

25 (35)cm, makes small pale beige and mauve to pale mauve-green flowers on upright stems. Native of rocky soils from Caledon through South Africa and Zimbabwe. For any rich, well drained soil in a sunny spot. Requires a good winter protection (i.e. dry mulch layer). Best grown in pots under frostfree conditions in a cool greenhouse or wintergarden with reduced watering and a winter minimum of some 5°C. VII-VIII.
20 seeds per package.

price (plus Shipping Costs)
seed package 4989 € 7,99
seed package
Gladiolus pulcherrimus

Gladiolus pulcherrimus

30 (40)cm, a medium sized, most ornamental species with rather large, salmon-orange flowers with a greenish central zone on the lower tepals. For any rich, well drained substrate in full sun. Requires some good winter protection (e.g. thick dry mulch layer). In colder regions preferably grow in pots under frostfree conditions in a cool greenhouse or wintergarden. USDA Climate Zone 8. VII-VIII.
20 seeds per package.

price (plus Shipping Costs)
seed package8869 € 4,99
Gladiolus quadrangularis

Gladiolus quadrangularis

50 (90)cm, makes red to orange flowers on upright stems. Native of rocky and sandy soils from Cold Bokkeveld to Koo. For any rich, well drained soil in a sunny spot. Requires a good winter protection (i.e. dry mulch layer). Best grown in pots under frostfree conditions in a cool greenhouse or wintergarden with reduced watering and a winter minimum of some 5°C. VII-VIII.
20 seeds per package.

price (plus Shipping Costs)
seed package 4987 € 4,99
Gladiolus robertsoniae

Gladiolus robertsoniae

20 (35)cm, a smaller species with narrow, grass-like leaves and white to occasionally pale rose-shaded flowers. For any rich, well drained substrate in full sun. Requires some good winter protection (e.g. thick dry mulch layer). In colder regions preferably grow in pots under frostfree conditions in a cool greenhouse or wintergarden. USDA Climate Zone 8. VII-VIII.
20 seeds per package.

price (plus Shipping Costs)
seed package8868 € 4,99
Gladiolus rogersii var. rogersii

Gladiolus rogersii var. rogersii

30 (60)cm, makes beautiful blue, mauve or purple flowers with darker streaks or dots on lower perianth tubes. For any rich, well drained substrate in full sun. Requires a good winter protection (thick mulch layer), preferably grow in pots under frostfree conditions in a cool wintergarden or greenhouse. VIII-IX.
20 seeds per package.

price (plus Shipping Costs)
seed package 2991 € 7,99
Gladiolus saccatus

Gladiolus saccatus


20 seeds per package.

price (plus Shipping Costs)
seed package8605 € 4,99
Gladiolus scullyi

Gladiolus scullyi

20 (45)cm, makes showy cream, white and greenish flowers with purplish spots on upright stems. Native of clay rocky soils from Namaqualand and western Karoo to Klawer. For any rich, well drained soil in a sunny spot. Requires a good winter protection (i.e. dry mulch layer). Best grown in pots under frostfree conditions in a cool greenhouse or wintergarden with reduced watering and a winter minimum of some 5°C. VII-VIII.
20 seeds per package.

price (plus Shipping Costs)
seed package 4985 € 4,99
Gladiolus sericeovillosus

Gladiolus sericeovillosus

150 (200)cm, a very tall species with yellow-ribbed leaves, cream to pink or wine red flowers with yellow or green marks. For any rich, well drained substrate in full sun. Requires some good winter protection (e.g. thick dry mulch layer). In colder regions preferably grow in pots under frostfree conditions in a cool greenhouse or wintergarden. USDA Climate Zone 8. VII-VIII.
20 seeds per package.

price (plus Shipping Costs)
seed package 2992 € 4,99
Gladiolus splendens

Gladiolus splendens

70 (100)cm, makes sword shaped leaves and very attractive bright scarlet red flowers with very large lower petals. For any rich, well drained substrate in a sunny spot. Preferably grow in pots under frostfree conditions in an unheated wintergarden or greenhouse. During dormancy reduce watering to a minimum. VI-VIII.
20 seeds per package.

price (plus Shipping Costs)
seed package 2993 € 4,99
Gladiolus stellatus

Gladiolus stellatus

35 (70)cm, a showy species with fragrant, white to white and pale mauve streaked flowers. For any rich, well drained substrate in a sunny spot. Best grown under frostfree conditions in a cool greenhouse or cold wintergarden. During dormancy greatly reduce watering and in winter keep plants at a minimum of some 7°C. V-VI.
20 seeds per package.

price (plus Shipping Costs)
seed package9566 € 7,99
Gladiolus undulatus

Gladiolus undulatus

100 (150)cm, long-tubed pinkish cream to greenish-white flowers with markings on each lower petal. For any rich, well drained soil in full sun. Needs a good winter protection /mulch layer). Ideal for a frostfree cultivation in the unheated greenhouse or cool wintergarden. Zona Climática USDA 8. VII-VIII.
20 seeds per package.

price (plus Shipping Costs)
seed package 2995 € 4,99
seed package
Gladiolus vinosomaculatus

Gladiolus vinosomaculatus

70 (110)cm, a tall species with sjowy creamy-white flowers and maroon spots on upright stems. For any rich, well drained soil in a sunny spot. Requires a good winter protection (i.e. dry mulch layer). Best grown in pots under frostfree conditions in a cool greenhouse or wintergarden with reduced watering and a winter minimum of some 5°C. VII-VIII.
20 seeds per package.

price (plus Shipping Costs)
seed package 4997 € 7,99
Gladiolus virescens var. virescens

Gladiolus virescens var. virescens

15 (25)cm, a dwarf species with narrow leaves and quite large, sweetly scented yellowish-green to rose flowers. For any rich, well drained substrate in full sun. Requires a good winter protection (thick mulch layer), preferably grow in pots under frostfree conditions in a cool wintergarden or greenhouse. V-VII.
20 seeds per package.

price (plus Shipping Costs)
seed package 0063 € 5,99
Gladiolus watermeyeri

Gladiolus watermeyeri

15 (35)cm, a medium sized species with most ornamental, strongly fragrant, cream flowers with prominent brownish-purple veins and a lower greenish yellow petal. V-VII.
20 seeds per package.

price (plus Shipping Costs)
seed package 0064 € 9,99