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How to Grow and Care for Black garlic

Black garlic, also known as Broad-leaved leek, Broadleaf garlic, Ornamental onion

Black garlic requires minimal maintenance, thriving in well-draining soil and full sun exposure. Special attention should be given to avoid waterlogging, which can lead to bulb rot. During the growing season, adequate watering and the occasional application of a balanced fertilizer support its development. Post flowering, black garlic's foliage should be allowed to die back naturally, ensuring energy is returned to the bulbs for the next season's growth.

Watering schedule: Every week

Sunlight Requirements: Full sun

In This Article

Planting and Growing Black garlic

Toughness	High
Care Level	Medium
Care Difficulty	Easy
Lifespan	Perennial
Watering Schedule	Every week
Sunlight Requirements	Full sun
Soil Type	Garden Soil
Soil pH	6-7.5
Planting Time	Early spring
Hardiness Zones	7-10

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Varieties of Black garlic

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Black garlic 'Silver Spring'

Black garlic 'Silver Spring' is a rare and much coveted A. nigrum cultivar, professionally grown in the Netherlands. Dr. Rina Kamenetsky, Professor of Horticulture and Plant Physiology, discovered the cultivar in 1999. Black garlic 'Silver Spring' has a ivory-colored, wide, composite flower with a pink tint. As the flower matures, it begins to glisten white and becomes dotted with raspberry starbusts. Gardeners also enjoy its pleasant, honey fragrance.

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Onions 'Jackpot'

You really do win the jackpot with this one. Just look at its immense lilac-colored, globe-like blooms. Onions 'Jackpot' is an Allium cultivar of unknown parentage. Because of this, experts are unsure exactly how this plant differs from its parent, but it definitely isn't like the common onion, which is another species of this genus!

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Onions 'Mars' is an ornamental onion that bears round clusters of, compact star-shaped flowers in a dark purple-red color. It is a hybrid cultivar of Allium ‘Stipitatum’ and Allium ‘Purple sensation.’ It is easy to grow in well-drained soil and full sun. Looks stunning when grown in drifts amongst other ornamental grasses.

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Onions 'Globemaster'

Onions 'Globemaster' is a type of ornamental onion, which produces spherical, shaggy purple flowers on tall stalks. The flowers of this cultivar are remarkably large, measuring 25 cm in diameter, hence its name - they are like large globes. Unlike other types of flowering onions that tend to produce an 'oniony' smell, these flowers generally lack a fragrance.

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Onions 'Pinball Wizard'

Onions 'Pinball Wizard' displays a striking presence in the garden with its large, spherical clusters of star-shaped purple flowers. This ornamental onion variety thrives in full sun, where its tall stems rise above many other plants, providing a layer of visual interest at middle to rear borders. Its strong, upright growth and distinctive floral globes attract pollinators while resistive to deer and most pest pressures, making it an appealing choice for diverse garden settings.

Common Pests & Diseases

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More General Info About Black garlic

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Full Care Guide

Common Pests & Diseases

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