Magnum Calla Lily Bulbs (Pack of 1)

Zantedeschia 'Magnum'

Magnum Calla Lily is an impressive calla variety prized for its oversized, deep-colored blooms and bold tropical foliage. These premium calla lily bulbs produce dramatic, chalice-shaped flowers in rich shades of crimson to burgundy, set against lush green leaves speckled with white. A favorite among floral designers and home gardeners alike, this variety adds unmatched elegance and structure to garden beds, borders, containers, and cut flower arrangements. Blooming prolifically from early to mid-summer, it brings refined beauty and color to your garden or indoor displays.

• USDA Zones: 8–10 (lift bulbs in colder zones)
• Bloom Time: Late Spring–Summer
• Height: 24–36"
• Planting Depth/Spacing: 3–4"/12"
• Deer Resistant: Yes

To learn more about the bulbs’ upkeep and maintenance, please visit our blogs and videos below.

Whether you're designing a formal garden or looking to enhance your floral displays, Magnum Calla Lilies are a luxurious choice that delivers vibrant color and sophisticated form. These high-performing plants offer long-lasting blooms and strong stems, making them an ideal solution for ornamental gardens and professional flower arrangements.

Key Characteristics and Benefits of Growing Magnum Calla Lily Bulbs

• Striking Bloom Color: Deep burgundy to crimson hues offer dramatic impact in any planting design.
• Versatile Garden Use: Perfect for containers, borders, mass plantings, or indoor pots.
• Extended Bloom Season: Consistent flowering from late spring into mid-summer with proper care.
• Florist Favorite: Excellent choice for fresh-cut arrangements thanks to sturdy stems and long vase life.
• Easy Maintenance: Adaptable to a range of soil conditions and climates within suitable USDA zones.

How to Plant Calla Lily Bulbs

Learning how to plant calla lily bulbs is easy and rewarding. Choose a location that receives full sun to partial shade and offers rich, well-draining soil. Plant the bulbs 3–4 inches deep, spaced about 12 inches apart. Water thoroughly after planting and keep soil consistently moist during active growth. In zones 7 and below, lift bulbs before frost and store in a dry, frost-free location for replanting next season.

Soil and Climate Considerations

Magnum Calla Lilies grow best in loose, organic-rich soil that retains moisture but drains well. These bulbs thrive in USDA zones 8–10, where they can be left in the ground year-round. In colder climates, treat them as annuals or lift and store them to replant the following year.

Sunlight and Watering

Calla lilies prefer full sun in cooler climates and partial shade in hotter regions. Provide regular watering to maintain moist, but not soggy, soil. Avoid overhead watering to prevent rot and fungal issues.

Fertilization and Care

Apply a balanced liquid fertilizer every 4–6 weeks during the growing season. Deadhead spent flowers to encourage continued blooming and prevent seed formation, which can sap plant energy.

Multiple Trusted Brands at Grow Organic

At Grow Organic, we offer Magnum Calla Lily Bulbs from multiple trusted, high-quality brands. This ensures that our customers have more choices in terms of price, bulb size, and cultivation preferences—so you can select the perfect option for your unique garden vision with confidence.

Additional Calla Lily Growing Tips

For more insights and seasonal care instructions, explore our comprehensive Flower Bulb Growing Guide.

Explore even more spring favorites in our Annual Flower Seeds Collection.