Gladiolus — Package of Practices
A bulbous cut-flower crop — plant graded corms, earth up and stake the tall spikes, and cut them just as the lowest florets show colour.
Overview
Gladiolus is a leading bulbous cut-flower crop, grown for its tall, showy flower spikes used in bouquets, vases and decoration.
It is grown from underground corms. Each corm produces one spike and then multiplies into new corms and tiny cormels for the next crop. By staggering planting dates, spikes can be supplied over a long window. Types differ in spike length, floret number and colour. No specific cultivar is named here.
Climate & season
Gladiolus needs mild, cool, sunny weather (about 15–25 °C) and full sun. Frost damages spikes, so planting is timed so flowering misses both peak heat and frost.
- In the plains, plant in the cool season for winter spikes.
- Stagger plantings every 10–15 days for a continuous supply.
- Full sun gives strong, straight spikes.
Soil & land preparation
A deep, well-drained sandy loam to loam suits gladiolus best, at a pH of 6.0–7.0. Corms rot in heavy, wet soil.
- Form raised beds for excellent drainage.
- Mix in plenty of well-rotted farmyard manure before planting.
- Work the soil deep and fine so corms seat well.
- Rotate to keep soil-borne corm rots low.
Choosing a type & material
Select by spike length, number of florets, colour and days to flower. The corm is the planting unit and its size and health decide spike quality. No specific cultivar is named here.
Planting material
- Use healthy, medium–large corms (about 4–6 cm), firm and free of rot.
- Plant only after the natural dormancy is broken and corms have begun to sprout.
- Field stands carry roughly 1.5–2 lakh corms/ha.
- Grow on the small cormels to build your own planting stock.
Preparation
- Break dormancy before planting.
- Dip corms in a fungicide plus bio-agent against rot and thrips.
- Plant 5–7 cm deep on the prepared beds.
- Avoid planting damaged or undersized corms for flower production.
Planting & spacing
- Prepare raised beds and incorporate farmyard manure.
- Plant graded, treated corms about 30 × 20 cm, 5–7 cm deep.
- Irrigate lightly to start growth.
- Earth up around the plants as they grow to support the spikes.
- Provide stakes or support netting to keep tall spikes straight.
- Stagger plantings every 10–15 days for a continuous supply of spikes.
Nutrient management
Figures below are a general guide per hectare for one crop — adjust to soil test. Avoid excess nitrogen, which gives weak spikes.
| Input | Dose (per ha) | Notes |
|---|---|---|
| Farmyard manure | 20–25 t | Mix in at land preparation Basal |
| Nitrogen (N) | 100–150 kg | Splits at the 2–3 leaf and spike-emergence stages Split |
| Phosphorus (P₂O₅) | 60–100 kg | Full dose basal Basal |
| Potassium (K₂O) | 100–150 kg | Strengthens spikes and corms Split |
| Foliar / micronutrient | as needed | Balanced spray during growth Foliar |
Water management
Gladiolus needs even moisture; both drought and waterlogging hurt the crop.
- Keep the soil evenly moist through growth and flowering.
- The most critical stages are the 3-leaf, spike-emergence and flowering stages.
- Never waterlog — standing water causes corm rot.
- Reduce watering as the foliage yellows, before lifting the corms.
- Drip or careful furrow irrigation works well on the raised beds.
Intercultural & corm management
- Earth up around plants and provide support to keep spikes straight.
- Weed regularly and mulch between rows to conserve moisture.
- Remove side cormels early if you want to build up corm size.
- After spike harvest, let the foliage mature to feed the new corms.
- When leaves dry, lift, cure and store the corms and cormels in a cool, dry, airy place for the next season.
Plant protection
| Problem | Type | Watch for | Manage |
|---|---|---|---|
| Thrips | Pest | Silvery streaks on leaves and deformed, discoloured florets — the key pest | Blue sticky traps, corm treatment, a recommended insecticide at threshold |
| Aphids | Pest | Clusters on tender growth; honeydew; virus spread | Yellow sticky traps, neem, a recommended insecticide |
| Cutworms | Pest | Young shoots cut at the base near the soil | Clean beds, hand-collect at night, a recommended soil treatment |
| Mites | Pest | Stippled, bronzed leaves in hot dry weather | Neem, a recommended miticide; avoid dust stress |
| Fusarium corm rot / wilt | Disease | Yellowing, wilting plants; rotting corms in store | Corm treatment, good drainage, crop rotation, sound storage |
| Botrytis | Disease | Water-soaked spots on leaves and florets in cool, humid spells | Airflow, keep foliage dry, recommended fungicide |
| Leaf spot | Disease | Brown spots that spread on the leaves | Sanitation, recommended fungicide |
| Scab | Disease | Sunken, dark lesions on corms and lower leaves | Healthy corms, drainage, crop rotation |
IPM-first routine
- Start with healthy, treated corms and a well-drained bed.
- Keep beds tidy — remove debris and rogue out diseased plants.
- Scout weekly; use sticky traps for thrips and aphids.
- Favour natural enemies; use neem and bio-agents first.
- Spray recommended chemicals only at threshold, rotating modes of action.
- Cure and treat corms before storage to break the pest and disease cycle.
Use crop-protection inputs safely
Always read the product label and follow it. Use the correct dose — more is not safer or better. Wear protective clothing (gloves, mask, full sleeves) while mixing and spraying, and respect the pre-harvest interval before you pick. Put IPM and cultural methods first and treat chemical sprays as a last resort.
Harvesting & yield
Spikes are cut young so they open in the vase, and corms are harvested later.
- Cut spikes when the 1–2 lowest florets just show colour or begin to open, in the cool early morning.
- Leave at least four leaves on the plant so the new corm can develop.
- Keep cut spikes upright in water — lying flat makes the tips curve upward.
- Lift, cure and store corms and cormels once the foliage has dried down.
- Typical yield: a large number of marketable spikes per hectare, plus a fresh harvest of corms and cormels for the next crop.
Explore related crops
Gladiolus — Package of Practices
A bulbous cut-flower crop — plant graded corms, earth up and stake the tall spikes, and cut them just as the lowest florets show colour.
Overview
Gladiolus is a leading bulbous cut-flower crop, grown for its tall, showy flower spikes used in bouquets, vases and decoration.
It is grown from underground corms. Each corm produces one spike and then multiplies into new corms and tiny cormels for the next crop. By staggering planting dates, spikes can be supplied over a long window. Types differ in spike length, floret number and colour. No specific cultivar is named here.
Climate & season
Gladiolus needs mild, cool, sunny weather (about 15–25 °C) and full sun. Frost damages spikes, so planting is timed so flowering misses both peak heat and frost.
- In the plains, plant in the cool season for winter spikes.
- Stagger plantings every 10–15 days for a continuous supply.
- Full sun gives strong, straight spikes.
Soil & land preparation
A deep, well-drained sandy loam to loam suits gladiolus best, at a pH of 6.0–7.0. Corms rot in heavy, wet soil.
- Form raised beds for excellent drainage.
- Mix in plenty of well-rotted farmyard manure before planting.
- Work the soil deep and fine so corms seat well.
- Rotate to keep soil-borne corm rots low.
Choosing a type & material
Select by spike length, number of florets, colour and days to flower. The corm is the planting unit and its size and health decide spike quality. No specific cultivar is named here.
Planting material
- Use healthy, medium–large corms (about 4–6 cm), firm and free of rot.
- Plant only after the natural dormancy is broken and corms have begun to sprout.
- Field stands carry roughly 1.5–2 lakh corms/ha.
- Grow on the small cormels to build your own planting stock.
Preparation
- Break dormancy before planting.
- Dip corms in a fungicide plus bio-agent against rot and thrips.
- Plant 5–7 cm deep on the prepared beds.
- Avoid planting damaged or undersized corms for flower production.
Planting & spacing
- Prepare raised beds and incorporate farmyard manure.
- Plant graded, treated corms about 30 × 20 cm, 5–7 cm deep.
- Irrigate lightly to start growth.
- Earth up around the plants as they grow to support the spikes.
- Provide stakes or support netting to keep tall spikes straight.
- Stagger plantings every 10–15 days for a continuous supply of spikes.
Nutrient management
Figures below are a general guide per hectare for one crop — adjust to soil test. Avoid excess nitrogen, which gives weak spikes.
| Input | Dose (per ha) | Notes |
|---|---|---|
| Farmyard manure | 20–25 t | Mix in at land preparation Basal |
| Nitrogen (N) | 100–150 kg | Splits at the 2–3 leaf and spike-emergence stages Split |
| Phosphorus (P₂O₅) | 60–100 kg | Full dose basal Basal |
| Potassium (K₂O) | 100–150 kg | Strengthens spikes and corms Split |
| Foliar / micronutrient | as needed | Balanced spray during growth Foliar |
Water management
Gladiolus needs even moisture; both drought and waterlogging hurt the crop.
- Keep the soil evenly moist through growth and flowering.
- The most critical stages are the 3-leaf, spike-emergence and flowering stages.
- Never waterlog — standing water causes corm rot.
- Reduce watering as the foliage yellows, before lifting the corms.
- Drip or careful furrow irrigation works well on the raised beds.
Intercultural & corm management
- Earth up around plants and provide support to keep spikes straight.
- Weed regularly and mulch between rows to conserve moisture.
- Remove side cormels early if you want to build up corm size.
- After spike harvest, let the foliage mature to feed the new corms.
- When leaves dry, lift, cure and store the corms and cormels in a cool, dry, airy place for the next season.
Plant protection
| Problem | Type | Watch for | Manage |
|---|---|---|---|
| Thrips | Pest | Silvery streaks on leaves and deformed, discoloured florets — the key pest | Blue sticky traps, corm treatment, a recommended insecticide at threshold |
| Aphids | Pest | Clusters on tender growth; honeydew; virus spread | Yellow sticky traps, neem, a recommended insecticide |
| Cutworms | Pest | Young shoots cut at the base near the soil | Clean beds, hand-collect at night, a recommended soil treatment |
| Mites | Pest | Stippled, bronzed leaves in hot dry weather | Neem, a recommended miticide; avoid dust stress |
| Fusarium corm rot / wilt | Disease | Yellowing, wilting plants; rotting corms in store | Corm treatment, good drainage, crop rotation, sound storage |
| Botrytis | Disease | Water-soaked spots on leaves and florets in cool, humid spells | Airflow, keep foliage dry, recommended fungicide |
| Leaf spot | Disease | Brown spots that spread on the leaves | Sanitation, recommended fungicide |
| Scab | Disease | Sunken, dark lesions on corms and lower leaves | Healthy corms, drainage, crop rotation |
IPM-first routine
- Start with healthy, treated corms and a well-drained bed.
- Keep beds tidy — remove debris and rogue out diseased plants.
- Scout weekly; use sticky traps for thrips and aphids.
- Favour natural enemies; use neem and bio-agents first.
- Spray recommended chemicals only at threshold, rotating modes of action.
- Cure and treat corms before storage to break the pest and disease cycle.
Use crop-protection inputs safely
Always read the product label and follow it. Use the correct dose — more is not safer or better. Wear protective clothing (gloves, mask, full sleeves) while mixing and spraying, and respect the pre-harvest interval before you pick. Put IPM and cultural methods first and treat chemical sprays as a last resort.
Harvesting & yield
Spikes are cut young so they open in the vase, and corms are harvested later.
- Cut spikes when the 1–2 lowest florets just show colour or begin to open, in the cool early morning.
- Leave at least four leaves on the plant so the new corm can develop.
- Keep cut spikes upright in water — lying flat makes the tips curve upward.
- Lift, cure and store corms and cormels once the foliage has dried down.
- Typical yield: a large number of marketable spikes per hectare, plus a fresh harvest of corms and cormels for the next crop.