Gladiolus
Iridaceae HERB OUTDOOR Placement

Gladiolus

Gladiolus

Identified By Unknown Guest

Gladiolus is a genus of perennial bulbous flowering plants in the iris family. Known for their tall spikes of brightly colored flowers, they are popular favorites in gardens and floral arrangements.

Also known as: Sword Lily Corn Flag

Safety Warnings

Toxic to Pets: Ingestion of gladiolus corms can cause drooling, vomiting, lethargy, and diarrhea in cats and dogs.
Toxic to Humans: Ingestion of the bulbs can cause gastrointestinal irritation such as nausea, vomiting, and diarrhea in humans.

Growth & Dimensions

Height 60 - 150 cm
Width 15 - 30 cm
Growth Rate Moderate
Care Level Easy
Lifespan Perennial

Ideal Environment

Temperature 10°C - 35°C
Sunlight Hours 6 - 8 hrs/day
Sun Exposure Full sun
Soil pH 6 - 7
Watering Interval 5 - 10 days
Humidity 40.00% - 60.00%
USDA Zone 7 - 10

Mediterranean and Temperate Climates

Climate: Warm summers and mild winters with moderate rainfall.

Soils: Loam Sandy Loam
Annual Rainfall: 500 - 1200 mm

Native Regions

South Africa (ZA – Africa)
Tropical Africa
Mediterranean Europe

Care Guide

Watering

Water deeply once a week, providing about 2.5 cm of water. Increase frequency during hot, dry spells. Keep the soil moist but not waterlogged.

Sunlight

Plant in a location that receives full sun, ideally 6 to 8 hours of direct sunlight daily for optimal flowering.

Soil and Fertilizer

Grow in well-drained, sandy loam soil. Fertilize with a low-nitrogen, high-phosphorus and potassium fertilizer when shoots reach about 15 cm tall.

Pruning

Cut back flower spikes once the blooms have faded, but leave the foliage intact until it yellows and dies back naturally to nourish the corm for next season.

Propagation Methods

Division

Separate the new cormels from the mother corm during the winter storage period and plant them in spring.

Seed

Sow seeds in spring in a cold frame. Note that plants grown from seed may take 2 to 3 years to flower.

Common Diseases & Pests

Fusarium Yellows

Fungal
Symptoms:

Yellowing of leaves, stunted growth, and rotting of the corm.

Treatment:

Discard infected plants and corms. Use disease-free corms for future planting.

Prevention:

Rotate crops and plant in well-drained soil with a slightly acidic pH.

Thrips

Pest
Symptoms:

Silver streaks or white patches on leaves, and deformed or discolored flowers.

Treatment:

Apply insecticidal soap or neem oil at the first sign of infestation.

Prevention:

Inspect corms before planting and treat or discard any suspicious bulbs.

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