Gladiolus

Cultivation practices of Gladiolus
(Gladiolus spp)

INTRODUCTION
 Gladiolus belongs to the family Iridaceae.
 The name gladiolus was originated from the latin word gladius,
meaning a sword, on account of the sword-like shape of the foliage.
 The common name of gladiolus is ‘sword lily’ because of its sword-
shaped foliage.
 Gladiolus is popularly known as green of bulbous ornamental plants
and is native to mediterranean region & tropical South Asia.
 Gladiolus are grown in all parts of the world. In temperate countries the
most important period is summer, in tropical and subtropical climate
,it is grown in winter and spring.

Important and Uses
 Gladiolus is a very popular flowering plant in international cut flower
trade.
 Its magnificent inflorescence with a variety of colours has made it
attractive for use in herbaceous borders, beddings, pots and for
cutflowers.
 For cutflowers, primulinus types are better as more spikes often come
out from a corm and they may be planted in isolated borders.
 Grandiflorus and primulinus types look very attractive in mixed flower
borders , but primulinus types are preferred as these do not need
staking, and so, are also good for bedding.

Types and Classification
A total 23 species have so far been used in the development of
modern gladiolus cultivers.
Classification:
1. Grandiflorus or large flower hybrids:
These are large or exhibition type gladioli.
The plants are vigorous bearing long spikes with large
flowers. Florets are 10-20 cm wide, arranged closely
and symmetrically on 90-150 cm spikes.
2. Primulinus hybrids:
They are also vigorous. The stem grow upto
a height of 70-105 cm, flowers 5-10 cm across and are
well spaced on 40-45 cm long spikes. The upper most
inner petals are attractive ,anthers& stigma appear
above the petals.

3. Butterfly hybrids:
The plants grow to a height of 75-120
cm. Spikes are shorter than 45 cm. The florets
are 7.5 -10 cm across. Having some markings
or blotches on the petals. Florets are arranged
symmetrically & closely of the spikes.
4. Miniature hybrids:
These hybrids are of relatively recent
origin. The plant height varies from 75-105
cm. The florets are 2.5-5 cm across born on
about 40 cm spike. Many of these hybrids
have raffled sepals, they produce very small
corms and multiply very slowly.

5) Face up:
The stem is dwarf, usually 60-90 cm
tall. Florets are nearly 5-6 cm wide and face
upward.
6) Colvillei Hybrids:
The plant grow hardly more than 60
cm tall. Flowers are 5-7 cm across and star
shape. These are early flowering hybrids
and are more suitable for growing under
Greenhouse.
7) Orchideala hybrids:
The new growth of gladiolus is dup
in Israel. Spikes are light in weight with
smaller florets on shorter stem.

8) Double gladiolus:
Normal gladiolus florets consists
of 6 tepals. Any gladiolus > 6 tepals are
known as double gladiolus.
9) Dragons:
These group has long twisted
tepals with attractive colours.
10) Fragrant :
Some South African sp. Of
gladiolushave fragrance and the quality
of fragrance varies from apple blossom
to rose smell.The first scented gladiolus
variety was named as lucky star.

Varieties
The most promising varieties of gladiolus
are....
American Beauty( Red), Friendship (pink), Novalux
(yellow) , Peterpears (orange), Pricilla ( white & light
pink), Spic & Span (orange ), Oscar (red), White Prosperity
(white), Her Majesty ( purple) ,Red candyman ( rani
colour) , Dhannawanti (purple), Sunny Boy (purple).

Propagation
 Commercially gladiolus is vegetatively
propagated through corm and cormels.
 For cutflower production gladiolus is
propagated by corms however for generation
of the planting materials it is propagated by
cormels.
 Gladiolus is propagated by corms of at least
4-5 cm diameter.
 It should be healthy and disease free.
 Conical shaped corms preferred over flat
one as it gives better flowers.
Gladiolus Corm
Gladiolus Cormels

SOIL AND CLIMATE
SOIL:
 Gladiolus can be grown wide range of soils from a light sandy to a clay
loam but deep, well drained, friable, rich in organic matter and
nutrients are preferable.
 For best result they require a slightly acidic soil of ph 5.5 to 6.5 where
most of the nutrients become available to plants.
 Liu et al (1998) found that cormel germination was suprresed when
soil ph more than 7.8.

CLIMATE:
 For successful cultivation of this crop, mid climate is ideal
while very hot and too cold atmospheric conditions are
harmful.
 The day temperature should range between 15 ⁰ and 20 ⁰ C.
Temperature falling below 6 ⁰C may cause frost injury to
the plant.
 At the time of planting, the soil temperature should not be
less than 10 ⁰C.

Time of planting and spacing
 Under North Indian condition the gladiolus is planted in the
month of oct- nov.
 For flower production and for any corm sizes a spacing of 30-45
cm from row to row and 15-20 cm corm to corm is maintained.
Depending upon the soil condition & size of the corm the
spacing may vary.
 The corm should not be planted too dip nor too shallow.
 The depth of planting should be 2-5 cm from the ground level.
 Croms are to be planted in staggard manner at an interval of 7-15
days to get continuous flower for a long period .

 Nutritional Requirements:
5 kg of FYM/ square metre should be will incorporated at
the time of land preparation. NPK@ 1:2:2 should be
applied 56 gm/ square metre. Half of these nitrogen in the
entire dose of P and K should be applied at the time of
land preparation. The remaining half N should be applied
30-35 days after planting because at that stage the plant
use to produce the spike.

Interculture operation
Irrigation:
 The frequency of irrigation depends largely on the type of soil
and prevailing weather conditions.
 During warm weather, watering should be done twice a week
sufficiently to wet the roots.
 A gladiolus crop must not be allowed to suffer from water stress
especially when spiles are emerging.
 Regular irrigation at the intervals of 7 to 10 days depending upon
weather is necessary. Over watering should be avoided.

Mulching:
 Mulching is important for conserving the moisture and reducing
the weed populations.
 Its effectiveness is depends on the type of materials and
thickness of mulch used.
 Mulching is done between and across the rows.
 Care should be taken to mulch the beds only when there is
sufficient moisture, otherwise it will not serve any purpose.
 Fresh manure, chopped straw, dried grass, clippings, saw dust,
peat, husk, bark and strips of black polythene may effectively be
used as mulching materials.

Earthing up:
 Usually gladiolus corm need 12-15 days for sprouting .Initial few days
the corm should not be disturbed except the removal of the initial
weeds.
 Once the plant attain to a height of about 15-20 cm a light earthing up
should be provided from both side of the row.
 At this stage if the weather is dry amount of water to be applied.
 Occasionally the weeds should be removed and the soil should be
loosened with the help of a fork.
 When the plant will be a 5-6 leaf stage the second earthing up should
be done.
Staking:
 At 5-6 leaf stage, the plant should be stake with the help of a bamboo
stick.
 During staking care should be taken to avoid any damage to the
underground corm and cormels.

Diseases and Pests management
Diseases:
Fusarium rot and yellow: Commonly known as ‘vascular
disease’, ‘dry rot’ or ‘core rot’ is caused by Fusarium spp.
Roots may show discrete brown lesions or a general rotting,
leaf infection is basal and associated with corm rot. Leaf
yellowing starting with oldest leaves.
Control Measures:
1.Treat the corms by dipping in carbendazim
(1 g/L water) or captan (2 g/L water) for
60minutes after harvesting and before
storage.
2. Use disease free corm stock

2. Grey mould (Botrytis chinerea) :
On leaves, large oval to round, brown spots appear. spots
occur on flowers and stems also. At first the spots are pale
brown and then become dark. A soft, brown rotting at the
base of florets may develop after rainfall. In a moist,
cool atmosphere, the whole flower becomes covered with
brownish grey growth of the fungal spores.
Control Measures:
1. Remove old flowers spikes and destroy.
2. Hot water treatment (52 ⁰C)of corms with carbendazim (1
g/L water) added to the water is effective in eradicating the
pathogen from planting stock.

Pest:
1. Thrips : Thrips are small insects and are normally
not visible naked eye. They feed on leaves, spikes and
the florets. Silver and brown stick are noticed on the
affected leaves.
This insect can be controlled with malathion
0.1% spray.
2.Aphids: Aphid suck the sap from tender leaves and
emerging spikes as well as florets.
This can be controlled by spraying with
monocrotophos at 0.05% can effectively controlled.

3. Mites : Mites also present in soil and attack the
corms. They occur in hot season and damage leaves
and buds which gave a pale appearance.
Mites can be controlled by application of
kathane 0.5%.
4. Caterpillars and various cut worms: These
ocassionally feed on foliage at spikes.
Manual collection & destruction in early stages
can check the infestation .

Harvesting and Yield
Harvesting of flower spikes:
 For local market gladiolus is harvested when the lower
most pair of floret is fully opened.
 For distant market harvesting is usually done when the
lower most pair of floret has just shown the colour.
 For local market harvesting is usually done in morning
hours. Immediately after harvesting the spike should be
kept in a bucket of a plain water.
 For local market it is advisable to sent the flower in the
bucket of water itself.

 However for distant market these are packed gently in
some suitable card board boxes wrapping with a loose
papers. It is advisable to provide some cotton ball soaked
in water at the base of the spikes.
Yield of flowers:
 The flower spike yield in gladiolus is very according to the
cultivar, corm size , planting density and management
practices etc.
 Approximate yield of flower spike would be around
2,00,000 per hectare.

Grading
Grade Spike length Number of
florets
Fancy >107 cm 16
Special > 96 to 107 cm 15
Standard > 81 to 96 cm 12
Utility < 81 cm 10

Harvesting of the corms and cormels
 Generally, the corms and cormels required 30-35 more days
after harvest to get properly matured.
 After harvesting of the spikes water should be withheld and
allow the plants to remain in the field itself .
 When the lower leaves starts turning yellow the corm
should be harvested.
 With the help of a hoe the entire plant along with corm
and cormels should be turned upside down.
 Then with the help of secateurs the plant should be detach
from the corms. These materials are dried under shed.

 After that they are completely cleaned, graded at the size
and packed in marketing bags after mixed with bavistin
powder.
Yield of corm and cormals:
 The yield of gladiolus corm and cormals is influenced by
cultivars, corm size and other factors.
 Approximately 41.3 t/ha.

Storage of Corm
 Proper storage of corm and cormels are very important , as
otherwise storage rot of corm may occur due to fungal infection.
 Corms are stored in single layers in wooden trays having a wire
bottom.
 The scales over the croms are not removed during storage.
 Before storage corm/cormals should be treated with fungicides,
than air dried and stored.
 For gladiolus 4-10 ⁰C cold temperature are required.

Gladiolus

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