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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 5°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 abbreviatus

Gladiolus abbreviatus

40 (60)cm, makes salmon red to orange flowers with very short green to blackish lower petals. For any rich, well drained soil Requires a good winter protection (e.g. thick mulch layer), better in pots in an unheated wintergarden or a cold greenhouse. USDA Climate Zone 8. VI-VII.

price (plus Shipping Costs)
seed package 2965 € 4,99
Gladiolus alatus

Gladiolus alatus

20cm, dwarf species with scented orange flowers and yellow to lime green lower lobes. For inorganic soils. USDA Climate Zone 8. VI-VII.

price (plus Shipping Costs)
seed package 2966 € 7,99
Gladiolus angustus

Gladiolus angustus

25cm, makes long-tubed white or yellow flowers, the lower lobes show dark red or purplish red markings. Very easily cultivated. 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. VII-VIII.

price (plus Shipping Costs)
seed package 2967 € 5,99
Gladiolus appendiculatus

Gladiolus appendiculatus

40 (60)cm, makes rather long leaves and white to pale rose flowers with dark rose spots on the lower tepals. 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. V-VI.

price (plus Shipping Costs)
seed package9543 € 4,99
Gladiolus aquamontanus

Gladiolus aquamontanus

70 (100)cm, a tall, beautiful species with arching leaves and mauve to rose flowers. For any rich, well drained substrate in full sun throughout the year. In colder regions grow in pots under frostfree conditions in a cool greenhouse or wintergarden. USDA Climate Zone 9. VII-VIII.

price (plus Shipping Costs)
seed package8873 € 4,99
Gladiolus arcuatus

Gladiolus arcuatus

15 (20)cm, dwarf Gladiolus species with pubescent leaves and grayish-purple to brownish-purple flowers on nodding stalks. For any well drained soil in full sun. Provide some good winter protection (thick mulch layer) or cultivate in pots in an unheated wintergarden. USDA Climate Zone 8. VII-VIII.

price (plus Shipping Costs)
seed package 2968 € 4,99
Gladiolus brachyphyllus

Gladiolus brachyphyllus

50 (70)cm, has showy, rich pink flowers with a dark pinkish-red throat. 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. V-VI.

price (plus Shipping Costs)
seed package9544 € 4,99
Gladiolus brevifolius var. brevifolius

Gladiolus brevifolius var. brevifolius

20 (50)cm, makes rose to lilac flowers on upright stems. Native of sandy to rocky soils from Clanwilliam to Riviersonderend and Bredsdorp. 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.

price (plus Shipping Costs)
seed package 4996 € 4,99
Gladiolus brevitubus

Gladiolus brevitubus

30cm, a medium sized species with narrow leaves and rich orange flowers. 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. V-VI.

price (plus Shipping Costs)
seed package9545 € 4,99
Gladiolus carinatus

Gladiolus carinatus

25 (40)cm, makes showy, sweet violet-fragrant (!), usually pale mauve flowers with a nicely contrasting yellow throat on upright stems. Native of sandy to rocky soils from Namaqualand to Knysna. For any 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.

price (plus Shipping Costs)
seed package 4998 € 7,99
seed package
Gladiolus carmineus

Gladiolus carmineus

25 (40)cm, Cliff Gladiolus, ornamental rich pink flowers above arching leaves. Growing in rock crevices in nature. For any rich, well drained, preferably rocky soil in a sunny, protected spot with some good winter protection (mulch layer) or for the unheated greenhouse or cool wintergarden. USDA Climate Zone 7. VI-VII.

price (plus Shipping Costs)
seed package 3192 € 4,99
Gladiolus carneus

Gladiolus carneus

1m, variable colored flowers, either white to mauve with or without markings. Outstanding and easy species. Für any rich, well drained substrate in full sun. Require a good winter protection (e.g. thick dry mulch layer), preferably frostfree cultivation in a cool wintergarden or unheated greenhouse. USDA Climate Zone 8. VI-VII.

price (plus Shipping Costs)
seed package 2970 € 4,99
Gladiolus ceresianus

Gladiolus ceresianus

30cm, fragrant dull purple to brownish flowers with dark narrow veins. USDA Climate Zone 8. VII-VIII.

price (plus Shipping Costs)
seed package 2971 € 5,99
Gladiolus crassifolius

Gladiolus crassifolius

1m, native from E Cape to Lesotho and Zimbabwe at 2.500m. Makes pink to mauve flowers with darker markings. USDA Climate Zone 7. III-IV.

price (plus Shipping Costs)
seed package 2974 € 4,99
Gladiolus cunonius

Gladiolus cunonius

30 (50)cm, a small species with narrow leaves and bright red, narrow flower tubes with a longer upper petal. V-VII.

price (plus Shipping Costs)
seed package 0060 € 3,79
seed package
Gladiolus dalenii

Gladiolus dalenii

1m, a striking, tall growing species with bright orange and yellow flowers. Easily grown in any rich, well drained soil in full sun. A good winter protection (e.g. dry mulch layer) is recommened, alternatively grow in pots under frostfree conditions in a coll wintergarden or greenhouse. USDA Climate Zone 7. VII-VIII.

price (plus Shipping Costs)
seed package 2975 € 5,99
seed package
Gladiolus densiflorus

Gladiolus densiflorus

30 (50)cm, makes several white to pale rose, small flowers with reddish spots on upright stems. For any 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.

price (plus Shipping Costs)
seed package 4993 € 4,99
Gladiolus ecklonii

Gladiolus ecklonii

30cm, dwarf species from north-eastern Cape to the Drakensberg on grassy slopes at up to 2.300m. For the alpine garden, very attractive white speckled flowers with red or purple. USDA Climate Zone 7. V-VII.

price (plus Shipping Costs)
seed package 2976 € 7,99
Gladiolus ferrugineus

Gladiolus ferrugineus

30 (60)cm, a medium sized, winter dormant species with channeled leaves and multicolored flowers in cream to pale pink. For any rich, well drained soil in a sunny, protected spot outside. In winter give some protection (e.g. a dry mulch layer). Alternatively grow in pots in a cool wintergarden or frostfree greenhouse, keep dormant corms dry at a minimum of some 5°C. VI-VII.

price (plus Shipping Costs)
seed package 1029 € 4,99
Gladiolus floribundus ssp. floribundus

Gladiolus floribundus ssp. floribundus

30cm, up to 7 firm and broad leaves, very elegant light pink to cream flowers. For any rich, well drained soil in a sunny spot. Requires a good mulch layer as winter protection or it can be grown alternatively under cold glass or in the unheated greenhouse or wintergarden. USDA Climate Zone 8. VI-VII.

price (plus Shipping Costs)
seed package 2977 € 4,99
Gladiolus geardii

Gladiolus geardii

40cm, makes stiff erect foliage and has variable large and very showy pink 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. VII-VIII.

price (plus Shipping Costs)
seed package 2978 € 7,99
Gladiolus gracilis

Gladiolus gracilis

25cm, slightly scented pale sky-blue flowers, a rarely seed flower color. For any rich, well drained soil in a very sunny spot. Requires a good winter protection (thick mulch layer), preferably for pots in the unheated greenhouse or wintergarden. USDA Climate Zone 8. VI-VII.

price (plus Shipping Costs)
seed package 2979 € 7,99
Gladiolus gueinzii

Gladiolus gueinzii

30 (50)cm, an almost evergreen species from sandy soils with very fleshy leaves and spikes of pink to purple flowers. For any rich, well drained, preferably sandy to rocky soil in a sunny, protected spot in the unheated greenhouse or cool wintergarden. USDA Climate Zone 8. VI-VII.

price (plus Shipping Costs)
seed package 3193 € 4,99
Gladiolus hirsutus

Gladiolus hirsutus

60cm, usually 3 hairy leaves and pink to mauve flowers with dark spots and streaks. USDA Climate Zone 8. VII-VIII.

price (plus Shipping Costs)
seed package 2980 € 4,99