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How to Grow Gladiolus

Reviewed by MyLocalPlanting Editorial Team Updated Sources
Gladiolus (Gladiolus × hortulanus)

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🛠️ Supplies You'll Need

🌍 Flower Garden Soil ✂️ Pruning Shears 🧤 Garden Gloves 🚿 Watering Can

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🌿 Plant Overview

Scientific Name Gladiolus × hortulanus
Category flower
Type Corm (spring-planted)
Days to Maturity 80 days
Starting Method Plant Bulbs

☀️ Growing Requirements

☀️

Sun

Full Sun (6+ hours)

💧

Water

Regular (1 inch/week)

↔️

Spacing

6" apart

🌱

Depth

4" deep

📏

Height

36-60"

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Companion Planting Guide for Gladiolus

Discover which plants grow well with Gladiolus and which to keep at a distance for a healthier garden →

🌾 Seed Saving Guide

🪴 Vegetative propagation

Propagate vegetatively, not by seed

Lift corms after frost kills foliage, cure 2–3 weeks, then store cool and dry; replant cormels to grow new stock.

🪴

Raised Bed Planting Guides

A 4×8 bed fits 4 per sq ft of Gladiolus. See plant counts, spacing grids, and companion pairings for every bed size →

Gladiolus Planting Calendar by Zone

Zone 1a Zone 1b Zone 2a Zone 2b Zone 3a Zone 3b Zone 4a Zone 4b Zone 5a Zone 5b Zone 6a Zone 6b Zone 7a Zone 7b Zone 8a Zone 8b Zone 9a Zone 9b Zone 10a Zone 10b Zone 11a Zone 11b Zone 12a Zone 12b Zone 13a

Gladiolus Planting Calendar by State

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Frequently Asked Questions

When should I plant Gladiolus? +

Plant Gladiolus bulbs directly in the garden 1 weeks after your last frost date. Use the search on this page to find exact dates for your location.

How long does Gladiolus take to grow? +

Gladiolus typically matures in about 80 days from planting. Exact timing varies by variety, soil conditions, and local climate.

Should I start Gladiolus indoors or direct sow? +

Gladiolus is planted as dormant bulbs directly in the garden — no indoor seed starting needed. Plant at the appropriate time based on your local frost dates.

How much sun does Gladiolus need? +

Gladiolus requires full sun (6+ hours) to thrive.

How far apart should I plant Gladiolus? +

Space Gladiolus plants 6 inches apart to allow adequate airflow and root development.

How much water does Gladiolus need? +

Gladiolus has regular (1 inch/week) water needs. Consistent moisture is important especially during germination and early growth.

Can you save seeds from Gladiolus? +

Gladiolus is not typically propagated by seed. Lift corms after frost kills foliage, cure 2–3 weeks, then store cool and dry; replant cormels to grow new stock.

About Gladiolus

Tall summer flower spikes from tender corms planted after the last spring frost. Perennial in zones 7+; north of zone 7, lift corms after first frost and store indoors over winter.

Expect your Gladiolus to be ready for harvest in approximately 80 days from planting.

Use the search above or browse by zone or state to find the perfect planting dates for your location.